Increase space & light
We reconfigure your layout to create a larger kitchen-diner or living area. Rooflights, bifold doors and wider openings help bring daylight deep into the home.
London rear extension specialists
Rear Extensions London
Create a brighter, larger and more valuable London home with a bespoke rear extension designed around open-plan living, natural light and a stronger connection to the garden.
Londonrear extension specialists
Designbespoke layouts for your home
Buildmanaged construction and trades
Freequote and project advice
Bespoke home extensions
Rear Extensions London – bespoke home extensions
A rear extension is one of the most effective ways to add modern living space without moving.
Looking to expand your London home? By building out to the garden, you can create a bright open-plan layout that floods with natural light and seamless indoor-outdoor flow. Our London design-build experts specialise in custom rear extensions that add space, light and long-term value.
We handle everything from initial concept to construction, including design, planning approvals, permitted development checks, structural calculations, Building Regulations and project management.
- Open-plan kitchen and living areas designed around your lifestyle
- Rear, single-storey, double-storey and garden-facing extension options
- Planning permission, permitted development and Party Wall support
- Complete design & build service with one clear point of contact
Why choose a rear extension?
More space, natural light and stronger garden connection
Rear extensions are popular with London homeowners because they improve the rooms used every day: kitchens, dining areas, family rooms, playrooms, home offices and garden-facing living spaces.
Modernise your home
A well-designed rear extension can bridge old and new, giving period London homes a better flow while respecting the original character.
Add value
Quality extensions can improve resale appeal and daily lifestyle. In high-demand London boroughs, a thoughtful rear extension can be a valuable investment.
Custom use
Whether you need a larger kitchen, family room, playroom, utility, office or lounge, we tailor the rear extension design to how you live.
Our services
Rear extension services in London
We provide a full design & build package to make your extension stress-free. One dedicated team manages every stage from architectural design and planning through to construction and finishing.
Design & build services
From day one, our experts work on your vision. We start with a detailed site survey and create a design that maximises space, natural light and garden connection.
Planning & permitted development
We assess whether your project can proceed under Permitted Development or if it needs a full planning application, saving you time and uncertainty.
Project management & construction
Once approved, our project managers schedule and supervise skilled trades from start to finish, giving you one clear point of contact.
Structural calculations
Opening a rear wall often requires steel beams and accurate calculations. Our engineers ensure structural work is correctly sized and ready for approval.
Building Regulations
We coordinate drawings and details for insulation, glazing, drainage, electrics, structure and Building Control sign-off.
Finishing & handover
We complete the extension with careful finishing, snagging and handover so your new space is ready to use.
Open-plan rear extension design
Design focused on light, flow and everyday living
Modern rear extensions typically feature large skylights, roof lanterns, folding or sliding glass doors and wider structural openings. This fills the new space with daylight and connects your kitchen, dining or living area to the garden.
A well-designed rear extension becomes the new heart of the home, allowing for spacious family living, entertaining and better use of the ground floor.
- Large glazed doors to connect the home with the garden
- Rooflights or roof lanterns to bring light deep into the plan
- Open-plan kitchen, dining and family layouts
- Materials and finishes chosen to complement the existing property
Our process
How we manage your rear extension
We keep your project organised from the first conversation through to final handover, with clear communication, careful planning and transparent pricing.
Free consultation & survey
We begin with a site visit and 1-to-1 consultation. We discuss your goals, layout ideas and budget, then provide clear advice and a detailed quote.
Tailored design
Our architects draft bespoke plans incorporating bifold doors, skylights, roof lanterns, kitchen layouts and other features you request.
Permits & approvals
We check permitted development, planning permission, Party Wall requirements, structural calculations and Building Regulations before work begins.
Construction phase
With approvals in hand, we manage foundations, structure, roofing, glazing, insulation, drainage, electrics and all main trades.
Finishing details
We coordinate plastering, flooring, decorating, joinery, kitchen installation or other finishes required for a polished result.
Final checks and handover
We complete snagging, provide relevant certificates and hand over a move-in-ready rear extension.
Planning & regulations
Rear extensions built on the right approval route
Many single-storey rear extensions can fall under Permitted Development, but every London property must be checked carefully. Conservation areas, boundary positions, height, depth, materials and previous extensions can all affect the answer.
- Planning permission checks for larger or sensitive extensions
- Permitted Development advice for qualifying rear extension projects
- Prior Approval and neighbour consultation guidance where required
- Party Wall, Building Regulations and structural calculations coordination
Trusted London experts
Rear extensions with clear pricing and careful delivery
Our team combines local knowledge with proven experience. We focus on transparent quotes, strong project management and high-quality workmanship from first survey to final handover.
Local London knowledge
We understand London terraces, tight access, period properties, conservation areas, Party Wall matters and borough-by-borough planning issues.
Fixed quote approach
You receive a detailed written quote before work begins, helping reduce surprises and control your budget.
One point of contact
A dedicated project manager keeps communication clear and coordinates trades, deliveries, inspections and progress.
Design & build package
Architectural design, planning, structural support, construction and finishing can all be coordinated through one team.
Quality workmanship
We build for long-term durability, from foundations and steels to glazing, insulation, drainage and finishes.
Peace of mind
We follow strict quality controls and can provide relevant documentation, certificates and handover support.
Related services
Joined-up support for your full rear extension project
A rear extension often needs planning checks, structural calculations, building regulations drawings and site management. We coordinate these services so the project stays clear and buildable.
Explore our related services for a complete London home extension route.
Questions homeowners ask
Rear extensions London FAQs
How much does a rear extension cost in London?
Costs vary by size, design and finish. As a rule of thumb, expect around £3,000–£5,000 per m² in London. Smaller projects may cost less overall, while larger or higher-specification extensions can cost significantly more. Our free quote will give you exact figures for your specific property.
Do I need planning permission for a rear extension in London?
Many single-storey rear extensions qualify as Permitted Development, meaning no full planning application is required. Deeper extensions may need Prior Approval neighbour consultation. Two-storey extensions or work in conservation areas usually need a full planning application.
How long does a rear extension take to build?
Timeline depends on complexity. Construction alone is often around 10–16 weeks. Including design and approvals, a straightforward permitted development build may take around 4–5 months, while full planning and Party Wall processes can take longer.
Will a rear extension add value to my home?
Yes. A well-designed rear extension, especially one creating an open-plan kitchen-diner, can improve both property value and day-to-day living. The exact increase depends on design quality, finish level, location and how naturally the extension works with the home.
What is included in your design & build service?
Our package can cover the full journey: survey, consultation, architectural drawings, planning checks, Building Control, structural calculations, Party Wall guidance, construction, finishing and handover.
Can you manage Party Wall matters?
Yes. Rear extensions in London often sit close to neighbouring properties. We can advise on likely Party Wall requirements and help coordinate the correct notices and process before construction starts.
Can I live at home during the build?
In many cases, yes, but there will be disruption during structural openings, foundations and service changes. We plan access, safety, temporary arrangements and communication to make the build as manageable as possible.
Start your rear extension
Request a free rear extension quote
Tell us about your home, your garden space and the new living area you want to create. We will advise on design options, planning route, likely build stages and next steps.
- Free no-obligation first conversation
- Advice on design, planning and build feasibility
- Support with quotations, regulations and project management
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Speak with our London team about your rear extension, from early design and planning through to construction and final handover.