Your House Extension Experts

House Extension Builders in Hampshire, Surrey and London UK

Contact us regarding your extension

Looking for House Extension Experts near me?

At Home Build Extensions, we cover Hampshire, Surrey and London, we are your best choice for Quality House Extensions. Whether you are from Basingstoke, Camberley, Guildford, or Kensington, we have great qualities and experience in the building and construction industry.

House extensions typically cost between £1,500 to £3,500 per square meter. This will depend on many factors.

 Popular types include:

  1. Single-storey rear extensions
  2. Double-storey side extensions
  3. Loft conversions
  4. Garage conversions

Most extensions require planning permission. The process usually takes 8-10 weeks for approval. Permitted development rights may apply for smaller projects.

What type of home extension do you need?

Adding a home extension is a fantastic way to gain much-needed extra space without the hassle of having to move house. With so many options available, deciding on the right type of extension can feel overwhelming. This guide explores the most popular house extensions available, helping you find the perfect fit for your home and needs.

We also offer an all-in-one house extension service, this is if you need the planning permission, structural calculations and architectural drawings taken care of too. We will take the stress away from this process for you and cover all aspects of the legal and safety regulations required!

Home Build Extensions, specialist Builders in Hook, Hampshire
Side Return House Extension inside view of side extension in Surrey UK
New house extension interior view, simple modern room with a plant in view.


House Extension Experts

Your Trusted Builders

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At Home Build Extensions, our planning service ensures your project starts smoothly and efficiently. We manage all aspects of the planning process, from initial consultations to obtaining necessary permissions. Our team works closely with local authorities to navigate planning regulations and ensure your extension complies with all legal requirements. This thorough approach minimises delays and streamlines the approval process, allowing you to focus on the exciting aspects of your home extension.


Our quality design service at Home Build Extensions is crafted to bring your vision to life. We collaborate with you to create bespoke designs that reflect your style and meet your functional needs. Our experienced designers use the latest technology to produce detailed plans and 3D models, giving you a clear picture of the final result. Whether you’re looking for a modern open-plan layout or a traditional extension that complements your existing home, our design team is dedicated to delivering innovative and practical solutions.


The development phase is where your dream extension becomes a reality. At Home Build Extensions, we manage every aspect of the construction process, ensuring high standards of workmanship and attention to detail. Our skilled builders and project managers coordinate all activities on-site, from foundation work to final finishes. We prioritise clear communication and regular updates, so you’re always informed about the progress of your project. Our commitment to quality and customer satisfaction ensures that your home extension is completed on time, within budget, and to your exact specifications.

House Extension Calculator

The results provided by this home extension calculator are intended to give you a rough estimate only.

For a precise and tailored quote, we offer a free, no-obligation site survey and detailed quotation service.
Our experienced team will:
Assess your property in person
Discuss your specific requirements
Consider all relevant factors
Provide a comprehensive, accurate quotation
To arrange your free site survey and receive a free detailed quotation, please contact us directly.
We're here to help you turn your home extension plans into reality with confidence and clarity.

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House Extensions in Hampshire

House Extensions in Hampshire

Home Builders covering Hampshire
At Home Build Extensions, we specialise in transforming homes across Hampshire, offering high-quality house extensions that enhance your living space and add value to your property. Our expert team serves numerous towns throughout the county, bringing your vision to life with meticulous craftsmanship and exceptional customer service.
Bathroom extension and renovation in London
Popular Hampshire Towns We Serve

Popular Hampshire Towns We Serve

Just a few areas we have covered...
Winchester: Blending historical charm with modern living spaces

Basingstoke: Creating contemporary extensions in this thriving town

Southampton: Expanding homes in this bustling port city

Portsmouth: Enhancing properties in this vibrant coastal community

Farnborough: Delivering innovative extensions in this aerospace hub

Aldershot: Transforming homes in this historic military town

Andover: Bringing spacious living to this market town

Fareham: Crafting beautiful extensions in this coastal haven

Eastleigh: Expanding properties in this railway town

Gosport: Adding value to homes in this peninsula town

Havant: Creating additional space in this market town

Fleet: Enhancing residences in this commuter-friendly area

Alton: Extending homes near the South Downs National Park

Petersfield: Crafting extensions that complement the town's Georgian charm

Romsey: Adding character to properties in this historic market town

Lymington: Designing extensions with a coastal flair

Ringwood: Expanding homes on the edge of the New Forest

New Milton: Creating additional living space in this coastal town

Totton: Enhancing properties in this New Forest Gateway town

Hedge End: Delivering modern extensions in this growing community

All-in-One Home Extension Package - From permission to Completion

Are you worried and confused about where to start with your Home Extension idea?

Imagining a more spacious and functional home but daunted by the planning permission process, architectural drawings, and structural calculations?

At Home Build Extensions, we deal with the technical side of house extensions, by offering a comprehensive, all-in-one package.

  • Get in touch and let us know if you need help, we guide you through how it works. We will take the pressure away from you having to deal with authorities for permissions, or trying to understand the technical drawings from the architects.
We know its a daunting process!

We spent years getting our heads around it too!

But now we are experts with many years experience, and we know exactly what to do, and what not to do.

Do not take the cheapest option, take the safest option and do your research on whats needed when building a house extension.
Don’t accept a builder stating its ok to just go ahead and start building, sometimes the cheapest option ends up costing you more when correcting mistakes made prior to the build!
Seek expert advice about house extensions, and the process you need to go through before you pay to start any type of construction or building work.

Structural Calculations You Can rely on:

Our qualified structural engineers will ensure your extension is safe, sound, and meets all building codes.
The structural frame of the extension and removal of any existing walls, is a very important part of the project, the calculations to your extension need to be accurate to ensure safety of future use throughout the test of time.

Project Management 1-1:

We'll manage every aspect of the construction process, keeping you informed and involved every step of the way.
There for you when you need us, while your project is live, we will be available to come and talk or guide you through any process whenever you feel you need us, just let us know, we will be there to explain any questions or queries you may have.

Planning Permission Made Easy for your extension:

We'll navigate the planning permission process on your behalf, ensuring your project adheres to all regulations.
This could take 6 - 8 weeks, so allow a good time frame when planning your home extension project.

Architectural Drawings:

Our skilled architects will create detailed and professional drawings that bring your dream extension to life.
These will also be available throughout the project incase you may decide to make a change, or half way through you have noticed you would rather another approach on something that you could'nt see before we started.

The Ultimate Guide to House Extensions in Hampshire, Surrey & London

Discover which House Extension suits your home with our comprehensive home extensions guide! Whether you’re in Hampshire, Surrey, or London, find the perfect extension type for your home.

From single-storey extensions to loft conversions, explore design ideas, cost considerations, and planning regulations. Our expert guidance empowers you to make informed decisions and find reputable house extension builders in Hampshire, Surrey, and London. Unlock your home’s potential – Let’s get started!

Single Storey House Extensions

  • A classic choice: Perfect for extending your kitchen, creating a spacious living area, or adding a downstairs bathroom or utility room.
  • Cost-friendly: Generally less expensive than double-storey extensions due to simpler foundations and roof construction.
  • Design flexibility: Can incorporate large patio doors or bi-fold doors to seamlessly blend the extension with your garden.
Single Storey House Extension built in the UK

Single Storey Extensions: Seamlessly Expand Your Living Space

Imagine transforming your cramped kitchen into a culinary haven with ample workspace, or creating a dedicated playroom for the kids. Single storey extensions excel at seamlessly adding valuable square footage to your existing ground floor.

  • Ideal for: Extending kitchens, creating spacious living areas, adding downstairs bathrooms, or utility rooms.
  • Benefits:
    • Cost-friendly: Simpler foundations and roof construction make single storey extensions generally more budget-friendly compared to their multi-storey counterparts.
    • Design Flexibility: Large patio doors or bi-fold doors can be incorporated to create a light-filled and open-plan living space, seamlessly blending the extension with your garden.
    • Improved Functionality: Whether you crave a bigger kitchen, a dedicated laundry room, or a downstairs bathroom for added convenience, single storey extensions cater to a wide range of functional needs.
  • Considerations:
    • Size Limitations: Due to the single storey nature, these extensions might not be suitable for creating a significant number of additional bedrooms. If extra bedrooms are your top priority, consider a double storey extension or a loft conversion (explored later in this guide).
White exterior Double Storey Home Extension built in the UK

Double Storey Home Extensions

  • Maximise your space: Gain valuable square footage on both floors, creating additional bedrooms, bathrooms, or even a home office.
  • Ideal for growing families: Provides separate living areas for children and adults, increasing privacy and comfort.
  • Planning considerations: May require additional planning permission due to the larger build size.

Double Storey Extensions: Maximise Your Square Footage

For growing families or those yearning for substantial extra space, double storey extensions offer the ultimate solution.

  • Ideal for: Growing families who need extra bedrooms, bathrooms, or a home office.
  • Benefits:
    • Increased Space: Double storey extensions provide the most significant additional square footage compared to other extension options. This allows you to create extra bedrooms, bathrooms, or even a dedicated home office space.
    • Enhanced Functionality: Imagine having dedicated bedrooms for children, guest rooms, or even a home cinema on the upper floor, while maintaining spacious living areas downstairs. Double storey extensions significantly improve the functionality of your home.
    • Potential Investment Value: Creating more bedrooms can significantly increase the resale value of your property, especially in areas with high demand for family homes.
  • Considerations:
    • Planning Permission: Due to the larger build size and potential impact on the property’s footprint, double storey extensions might require more complex planning permission processes. Consulting a qualified architect or builder early on is crucial to ensure your design adheres to local planning regulations.
    • Cost: While not necessarily the most expensive option, double storey extensions typically cost more than single storey extensions due to the additional construction required for the upper floor.

Planning Permission for House Extensions in the UK:

Do you need planning permission for your home extension?

Some House Extensions do not require planning permission, the image below (or to the side, if you're on a computer), showing house extension sizes, is showing you that these sizes and below do not require planning permission in the uk. With sizes above these in the diagram, they do need planning permission, Obtaining this process can seem daunting, but it doesn't have to be! Here's a simplified breakdown of the process:

Planning Permission checklist

  • Permitted Development Rights: Many smaller extensions fall under permitted development rights, allowing them to be built without formal planning permission. Your local council’s website can provide more information on these regulations.
  • Pre-application Advice: Seeking pre-application advice from your local planning authority is highly recommended. This can save time and frustration in the long run by ensuring your project aligns with local guidelines. A planning officer can offer valuable insights and guidance specific to your project. To find your local council’s planning portal, head over to the GOV.UK planning permission website:
  • Submitting a Planning Application: If planning permission is required, you’ll need to submit a detailed application. This typically includes architectural drawings, structural calculations (depending on the project’s complexity), and a written explanation of your proposal.
  • All-in-One Planning Package: Get in touch with our experts in this department, Plan 2 Build it have come onto the scene and bought with them a very high level of knowledge and experience in the planning and regulations side of building, prior to building. Check out their website here if you require any professional planning application guidance, or a full building control project from permission to build. Planning Help

Planning Permission Process Timeline: Expect the planning authority to take 8-12 weeks to make a decision on your application.

Home Build Extensions, specialist Builders in Hook, Hampshire
which size for house extension does not need planning permission in the UK
These House Extensions do not require planning permission

Side Return House Extensions

  • Smart space utilisation: Perfect for adding a utility room, downstairs WC, or extra storage space without a significant footprint increase.
  • Cheaper option: Often a more budget-friendly way to gain additional functional space.
  • Design limitations: May not be suitable for creating large, open-plan living areas.
Side Return House Extension inside view of side extension in Surrey UK
Side Return House Extension for a client wanting to make maximum space from a small area.

Side Return Extensions: Smart Space Solutions

Don’t be fooled by their name! Side return extensions, although smaller in size, pack a powerful punch when it comes to adding valuable space to your home.

  • Ideal for: Adding a downstairs WC, utility room, or extra storage space without a significant footprint increase.
  • Benefits:
    • Budget-Friendly: Side return extensions are often a more cost-effective way to gain valuable functional space compared to larger extensions. Their smaller size typically translates to lower construction costs, making them a great option for homeowners working with a tighter budget.
    • Increased Functionality: Even a small side return extension can significantly improve your day-to-day life. You can gain a much-needed downstairs WC, a dedicated utility room for laundry and storage, or even a small boot room to keep your entryway clutter-free.
    • Minimal Disruption: Due to their smaller size, side return extensions generally cause less disruption during construction compared to larger extension projects. This can be particularly beneficial for those who want to minimise the impact on their daily routines.
  • Considerations:
    • Size Limitations: Side return extensions are ideal for adding functional rooms or storage space but may not be suitable for creating large, open-plan living areas. If an open-plan layout is your priority, you might need to consider a single or double storey extension.
Wrap-around Home Extension for a property in Farnborough in the UK

Wrap-around Home Extensions

  • L-shaped design: Combines a side and rear extension, ideal for detached or semi-detached properties with alley space.
  • Dramatic transformation: Creates a significant amount of extra space, perfect for open-plan living areas and improved indoor-outdoor flow.
  • Planning permission: May require more complex planning approval due to the larger footprint.

Wrap-Around Extensions: Dramatic Transformations

Yearning for a dramatic and impactful way to expand your home’s footprint? Look no further than the impressive wrap-around extension.

  • Ideal for: Detached or semi-detached properties with alley space, offering the potential to create a significant L-shaped extension.

  • Benefits:

    • Dramatic Transformation: Wrap-around extensions offer a visually striking way to transform your home. They allow you to create a sizable L-shaped extension, perfect for open-plan living areas and improved indoor-outdoor flow. Imagine a spacious kitchen seamlessly connecting to a dining area and a light-filled living space, all bathed in natural light and offering a connection to your garden.
    • Maximised Space: Wrap-around extensions provide a substantial amount of extra space, ideal for growing families or those who crave expansive living areas.
    • Enhanced Functionality: The L-shaped design allows for creative room configurations, catering to diverse needs. You can create a dedicated home cinema, a luxurious master suite, a playroom for the kids, or even a combination of these!
  • Considerations:

    • Planning Permission: Due to the larger footprint and potential impact on neighbouring properties, wrap-around extensions might require more complex planning approval processes. Consulting with a qualified architect or builder early on is essential to ensure your design adheres to local regulations.
    • Cost: The extensive construction involved in a wrap-around extension typically translates to a higher cost compared to smaller extension options.

Loft Conversions for home extension space

  • Unlock hidden potential: Utilise your loft space for a guest bedroom, playroom, or even a home cinema.
  • Cost friendly compared to ground-floor extensions: Avoids the need for additional foundations and extensive groundwork.
  • Height restrictions: Building regulations may limit the headroom available in a loft conversion.
Loft Conversion in the UK

Loft Conversions: Unlocking Hidden Potential

Looking to maximise your existing space without sacrificing valuable garden area? Loft conversions offer a brilliant solution.

  • Ideal for: Utilising unused loft space for a guest bedroom, playroom, home cinema, or even a home office.

  • Benefits:

    • Budget Friendly: Compared to ground-floor extensions that require additional foundations and groundwork, loft conversions can be a cheaper option for adding extra space.
    • Increased Functionality: Transform your underutilised loft into a valuable living space, perfect for a variety of uses depending on your needs.
    • Minimal Footprint: Loft conversions don’t alter the property’s existing footprint, making them ideal for properties with limited outdoor space.
  • Considerations:

    • Building Regulations: Building regulations may limit the headroom available in a loft conversion, impacting functionality. Structural work might also be required to ensure proper weight distribution.
    • Limited Natural Light: Unless strategically designed with skylights or roof windows, loft conversions can have limited natural light. Discussing natural light solutions with an architect or builder is crucial.
Basement Home Extension space for your home build.

Basement Conversions for your home

  • Subterranean space: Creates a unique additional living area, perfect for a home cinema, gym, or games room.


  • Planning considerations: Requires waterproofing and potential structural work, impacting cost.


  • Limited natural light: May necessitate the use of light tunnels or clever design solutions to brighten the space.

Basement Conversions (Cellar Conversions): Subterranean Living

For those seeking a unique and exciting way to expand their home, basement conversions offer intriguing possibilities.

  • Ideal for: Creating a unique additional living area, perfect for a home cinema, gym, games room, or even a wine cellar (depending on local regulations).

  • Benefits:

    • Unexpected Space: Basement conversions offer a surprising amount of additional space without impacting the existing property footprint.
    • Unique Character: A well-designed basement conversion can create a cool and unique living area with a distinct character.
    • Multifunctional Potential: The possibilities are endless! Imagine a dedicated entertainment space, a workout haven, or a cozy den – the choice is yours!
  • Considerations:

    • Cost: Waterproofing and potential structural work can significantly impact the cost of a basement conversion.
    • Limited Natural Light: Similarly to loft conversions, basements generally have limited natural light. Incorporating light tunnels or clever design solutions is crucial for a bright and inviting space.
    • Planning Permission: Depending on the extent of the conversion, planning permission might be required.

Conservatories for home extensions

  • Bring the outdoors in: Creates a light-filled space for relaxation or entertaining, offering beautiful garden views.
  • Planning exemptions: May benefit from simplified planning permission processes compared to traditional extensions.
  • Temperature control: Consider insulation and ventilation to ensure year-round comfort.
Conservatory house extension project in the UK

Conservatories: Bringing the Outdoors In

For those yearning to connect with nature and bask in abundant natural light, conservatories offer an idyllic solution. These glazed extensions seamlessly blend your home with the outdoors, creating a beautiful and versatile living space.

  • Ideal for: Creating a light-filled dining area, relaxing sunroom, or a playful garden room for children.

  • Benefits:

    • Increased Natural Light: Expansive windows and glazed roofs bathe the conservatory in natural light, creating a bright and uplifting atmosphere.
    • Indoor-Outdoor Connection: Imagine enjoying a morning coffee surrounded by greenery, or hosting a summer dinner party with a seamless flow between your home and garden. Conservatories foster a connection with the outdoors, enhancing your living experience.
    • Additional Space: While not physically extending the footprint of your home, conservatories provide valuable extra space for relaxation, entertaining, or even a dedicated workspace with a serene view.
  • Considerations:

    • Temperature Regulation: Conservatories can become very hot in the summer and quite chilly in the winter. Proper ventilation and potentially considering an integrated heating system are crucial for year-round enjoyment.
    • Planning Permission: In some cases, planning permission might not be required for smaller conservatories. However, it’s always best to check with your local planning authority to avoid any unforeseen complications.
    • Building Regulations: Conservatories must adhere to specific building regulations regarding energy efficiency and thermal performance. Consulting a qualified builder or architect ensures your conservatory design meets all necessary regulations.

This comprehensive guide has explored some of the most popular house extension options, empowering you to make an informed decision for your dream home transformation project. Remember, the perfect extension type depends on your specific needs, budget, and property. Consulting with a qualified builder or architect experienced in extensions within Surrey, Hampshire, or London is the first step towards creating your ideal home extension!

Choosing the Right Home Extension:

The best house extension type depends on your specific needs, budget, and property layout. Consider these factors:

  • Desired additional space: How much extra space do you need?
  • Functionality: What purpose will the extension serve?
  • Budget: Single-storey and side return extensions are generally more budget-friendly.
  • Planning regulations: Consult a local building professional to understand any restrictions.
  • Aesthetics: Ensure the extension complements the style of your existing home.

By carefully considering these factors and the different extension options, you can make an informed decision that transforms your home and fulfills your dreams!

Some of our recent Home Extension Projects in the UK

Our Extension builders take pride in their recent projects, which showcase a commitment to innovation and excellence in building and extending homes.

Our stunning home extensions that seamlessly blend with existing structures, our portfolio reflects the diverse needs and preferences of our Hampshire, Surrey and London clients. Here is just a few pictures of our recent extensions, ask for more detail if you would like a specific idea on a certain extension type.

We have hundreds of pictures and they are updated daily, check our social media for more details on recent home extension projects!

Loft Conversion in the UK
Side Return House Extension inside view of side extension in Surrey UK
Basement Home Extension space for your home build.
Loft Conversion for a Home Extension in the UK

Your House Extension Experts in Hampshire, Surrey and London

Your local trusted builder in Hampshire

A house extension is a fantastic way to achieve Value and Space. Here at Home Build Extensions, we specialise in creating bespoke house extensions in Hampshire, Surrey and London UK. our House Extensions are tailored to your unique needs and budget.

Frequently Asked Questions

Have more questions? Feel free to reach out to us directly. We're here to guide you through your House Extension journey in Hampshire, Surrey or London UK!

In some cases, you may not need planning permission for smaller extensions. However, regulations can vary depending on the size, location, and impact of the extension. It’s always best to check with your local planning authority or consult a building professional.

There’s a range of extension options to suit your needs and property! Popular choices include:

  • Single Storey: Perfect for kitchens, living areas, or downstairs bathrooms.
  • Double Storey: Maximise space with extra bedrooms, bathrooms, or a home office.
  • Side Return: Ideal for adding a utility room, WC, or extra storage.
  • Loft Conversion: Utilise unused loft space for a guest room, playroom, or even a home cinema.

We explore these options and more in detail on our website!

The cost of an extension varies depending on size, materials, complexity, and location. A single-storey extension might be more budget-friendly compared to a double storey but better investment on a double storey.

Get a free quote from reputable builders to get a more accurate idea for your project.

The timeframe depends on the size and complexity of the project, as well as planning permission approvals. A smaller extension might take a few months, while a larger project could take up to a year.

  • Experience: Look for builders with a proven track record and experience in similar projects.
  • Qualifications: Ensure they are qualified and insured.
  • References: Ask for references and check their online reviews.
  • Communication: Choose a builder who is clear, transparent, and easy to communicate with.

Experienced builders offer expertise in design, planning, construction, and project management. They can:

    • Help you navigate planning regulations.
    • Guide you through the design process.
    • Ensure high-quality construction that meets safety standards.
    • Manage the project efficiently, minimising disruption.

Contact us about your House Extension Project


Looking to expand your living space or extend your home in Hampshire, Surrey, or London? Home Build Extensions, located in Hampshire (tel: 07754 271410 | email:, is your one-stop shop for top-quality house extensions in the UK.

Your local trusted builder in Hampshire

Office / Service Area

Hampshire | Surrey | London UK



07754 271410

Extending your home to fit your future

Get in touch with us at Home Build Extensions, to discuss your house extension project and guide you through the best way to gain the most from your new open space extension, or an extra bedroom for your new born.

Feel free to contact us.