Design and planning
Survey, layouts and drawings, with any planning application prepared by our appointed architect and coordinated by us.
Home extensions · London
Home Extensions for Houses Across London
We design, gain approval for and build home extensions in London, from single-storey rear and side-return extensions to wraparound and double-storey additions.
4–6 monthsTypical build time
24 monthsWorkmanship defects period
5-starGoogle, Houzz & Trust A Trader
Home Extension Services We Provide
An extension brings together design, planning, structure, neighbours and many trades. We coordinate all of it, so you deal with one team.
Approvals and engineering
Structural calculations, Building Regulations approval and Party Wall matters arranged through the specialists we work with.
Groundworks and structure
Foundations, drainage, steels, walls and roof, built to the approved drawings and inspected at each stage.
Fit-out and finishing
Glazing, electrics, plumbing, heating, kitchen installation, plastering and decoration through to handover.
Typical timescales: design and approvals 3–5 months, then 4–6 months on site.
DISCUSS YOUR EXTENSIONExtension types
Extension Types We Build
We build extensions for terraced, semi-detached and detached houses across London, designed to suit the property and the planning position.
Single-storey rear
The ground floor extended into the garden, often for a larger kitchen and living space.
Side return
The narrow passage beside a terraced house used to widen the ground floor.
Wraparound
Side-return and rear extensions combined into one L-shaped space.
Double-storey
Space added on two floors, such as a kitchen below and a bedroom above.
Kitchen extensions
An extension planned around a new kitchen, with layout, services and glazing designed together.
Extension with loft conversion
Both projects designed and built together, sharing approvals, structure and programme.
Our Home Extension Process
Tell us about the property
Send the address, photographs, any existing plans and a description of the space you want to add.
We review the requirements
We assess the site, access, drainage and the likely route to approval, and recommend a measured survey where needed.
Scope and quotation
You receive a written scope and quotation covering design, approvals, specialist input and construction.
Design and approvals
Our appointed architect prepares the drawings and any planning or prior approval application, while we coordinate structural engineering, Building Regulations and Party Wall matters.
Groundworks and structure
We set up the site, lay the foundations and drainage, and build the walls, steels and roof to the approved drawings.
Fit-out
Glazing, electrics, plumbing, heating, plastering and any kitchen installation are completed in sequence.
Completion and handover
We walk through the finished extension with you, hand over the Building Control sign-off and our 24-month workmanship defects period begins.
Why Work With Innovate Home Solutions?
15 years' construction experience behind every extension.
- A defined scope before work begins
- Design, approvals and build coordinated
- Structural engineer and Party Wall surveyor arranged
- One point of contact throughout
· £10m Employers' Liability and £5m Public Liability cover
· 5-star rated on Google, Houzz and Trust A Trader
24-month workmanship defects period
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Verified Client Feedback
What London homeowners say about working with us, from the first drawings to the finished project.
We had a great experience from start to finish. The team delivered an excellent standard of work on our extension, supported by clear planning and effective communication throughout the project. The work was completed on time, within budget, and with minimal disruption. The final result is outstanding, and we are extremely satisfied. We would confidently recommend their services and would use them again in the future.
Absolutely delighted with the work from Innovate Home Solutions. They built a rear extension for us and the results were even better than we hoped. The team was always on time, tidy, and polite. Would highly recommend.
Aldas was an absolute lifesaver for our rear kitchen extension and open-plan kitchen project! Seriously, he was incredibly helpful every step of the way, from sorting out the planning application right through to the very end. We couldn’t recommend him more highly to all our friends.
A job well done. My experience with Refresh Renovations was exceptional from beginning to end. Aldas was a pleasure, not only did he make me feel comfortable with the outlay of the work, he was also able to offer alternatives at a higher, mid range and lower cost for my newly installed extension with my extended kitchen! I’d mentioned I spend a lot of my time in the kitchen and Aldas recommended under heated flooring. With my new porcelain tiles it works a treat. Recommendations are clearly Aldas’s strong point and any future works will be awarded to him and his team. Highly recommended.
Request a quote
Request a Home Extension Quote
Tell us about the property, the space you want to add and what stage you've reached. We confirm the likely route to approval and quote a defined scope before any work begins.
- 01
Send us the details
Tell us about the property and the space you want to add, and add photographs or plans if you have them.
- 02
We review the site
We check the site, access, drainage and the likely route to approval.
- 03
You receive a written quotation
It covers design, approvals, specialist input and construction, before anything begins.
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Home Extension FAQs
Answers to the questions London homeowners ask most before extending their home.
How long does a home extension take?
For an average extension, design and approvals typically take 3–5 months and construction 4–6 months. The programme depends on the size and type of extension, the site and the approval route, and we confirm yours in writing.
Do I need planning permission for an extension?
Some single-storey rear extensions can be built under permitted development, and some larger ones through the prior approval process. Others need a householder planning application, and flats, listed buildings and conservation areas have more restrictions. We confirm the right route, and our appointed architect prepares and submits the application.
Do I need a Party Wall agreement?
If you are building on or near a shared boundary, or digging foundations close to a neighbour's property, the Party Wall Act is likely to apply. We work with an established Party Wall surveyor and coordinate the process for you.
Who handles structural engineering and Building Regulations?
We do. We have structural engineers we regularly work with, and we coordinate Building Regulations approval and inspections through to the Building Control sign-off on completion.
Can we stay at home during the build?
Many clients do. Most of the structural work happens outside the existing house until the extension is connected. We plan the programme to limit disruption and let you know in advance when rooms or services will be affected.
How much does a home extension cost?
Cost depends on the size and type of extension, groundworks and drainage, glazing, the kitchen or fit-out and the level of finish. We review the project first and provide a written scope and quotation, so you know what is included before work begins.
What guarantee and insurance do you provide?
Our workmanship is covered by a 24-month defects period from completion, and products we supply carry the relevant manufacturer's warranty. We hold Employers' Liability cover of £10 million, Public Liability cover of £5 million and Contract Works insurance.
Still have a question? Send us the property details and we will advise.
Request a Quote