We support your project from survey, feasibility and drawings through planning, structural design, construction, snagging and handover.
West London rear extension builders
Rear Extensions in West London
Design-and-build rear extensions for West London homes, planned around brighter kitchen diners, family living space, better garden connection and a clear route from survey to handover.
West LondonFulham, Acton, Chiswick & nearby
Design & Buildsurvey to completion
Planningclear local guidance
Free Surveyquote-ready review
Rear extension builders for West London homes
Rear Extension Builders for West London Homes
We help homeowners create practical rear extensions that improve everyday living, add natural light and make the ground floor work harder for cooking, dining, relaxing and entertaining.
Victorian terraces, Edwardian semis and 1930s houses
West London homes often need careful rear-extension design because of tight gardens, shared boundaries, drainage, access and period property details. We plan the structure, layout and finish around your property type.
Open-plan kitchens, family rooms and utility space
A rear extension can create an open-plan kitchen diner, a family room facing the garden, a larger kitchen island, a downstairs WC or a practical utility room.
Why choose us?
Why Choose House Extensions London for Your Rear Extension?
Your rear extension needs clear planning advice, structural coordination, realistic pricing and project management from the first visit to the finished space.
Once scope and drawings are confirmed, we provide clear pricing, inclusions and a build programme so you know what is covered.
We help you understand planning permission, permitted development, lawful development certificates, Building Control and Party Wall matters.
We understand the rear-extension challenges of terraced streets, Edwardian homes, 1930s houses and tight-access urban builds.
Rooflights, glazing, kitchen islands, flooring, heating, lighting, utility rooms and worktops are planned together for a better final result.
Send your postcode, drawings or garden photos and we can advise on likely options, budget drivers and the next step.
Rear extension types
Rear Extension Types We Build
Every home is different, but most West London rear extensions fall into one of these practical layouts.
Rear kitchen extensions
Create a brighter kitchen diner with rooflights, a kitchen island and a stronger connection to the garden.
Full-width rear extensions
Open up the full back wall of your home for a wider kitchen, dining and living space with large sliding doors.
Single-storey rear extensions
A popular option for terraced and semi-detached homes where extra ground-floor space is the priority.
Double-storey rear extensions
Add ground-floor living space and first-floor accommodation where planning, structure and property type allow.
Costs and timelines
Rear Extension Costs and Timelines in West London
Rear extension costs depend on size, foundations, drainage, structural steel, access, glazing, roof design, insulation, heating, kitchen specification and finishes. A survey and drawings are needed for accurate pricing.
What affects the cost
Major cost drivers include the width of the opening, steelwork, excavation, drainage alterations, rooflights, sliding or bifold doors, underfloor heating, kitchen units, worktops and the level of decoration.
What is included in your quote
| Project item | Typical inclusion |
|---|---|
| Design and preparation | Survey, feasibility, specification review and quote preparation |
| Structure and shell | Groundworks, foundations, drainage, steelwork, walls, roof and insulation |
| Glazing and light | Rooflights, roof lanterns, bifold doors or sliding doors depending on design |
| Interior finish | Electrics, plumbing, plastering, flooring, heating, kitchen fit-out and decoration where agreed |
Final costs vary by property, access, design, specification and approval route.
Can you live at home during the build?
Many homeowners stay at home during the work, but it depends on disruption, temporary kitchen arrangements, service changes and the stage of the project.
Planning Permission for Rear Extensions in West London
Some rear extensions can be built under permitted development, but larger projects, conservation areas, listed homes, flats and previous extensions can change the route. We check the planning position before the design is finalised.
Useful official guidance: Planning Portal extension guidance, Planning Portal Building Regulations guidance, GOV.UK permitted development guidance, GOV.UK lawful development certificates, GOV.UK party wall guidance.
- Permitted development: rear extensions may qualify if they meet strict height, depth, boundary and property-type rules.
- Conservation areas and listed homes: West London boroughs often require more sensitive design, matching materials and planning checks.
- Lawful development certificates: many homeowners choose formal confirmation before starting work under permitted development.
- Borough-specific guidance: Hammersmith & Fulham, Ealing, Hounslow, Hillingdon, Kensington & Chelsea, Westminster and Richmond can each apply different local planning considerations.
- Building Control and Party Wall: structural steel, insulation, drainage, fire safety, electrics and neighbour notices must be handled correctly.
Process
Our Design and Build Process
A clear process keeps your rear extension moving from early idea to a finished, signed-off living space.
Survey and feasibility
We review your property, access, garden depth, drainage, boundaries, planning route, budget and preferred layout.
Design and drawings
We help coordinate drawings, layout options, glazing, rooflights, utility/WC planning and kitchen design requirements.
Planning and structural coordination
We help coordinate planning, lawful development, Building Regulations, structural calculations, Building Control and party wall requirements.
Build, snagging and handover
Your project is managed through demolition, foundations, steelwork, shell, roof, glazing, services, finish, snagging and handover.
Project proof
Recent Rear Extension Projects in West London
Explore examples of rear extension layouts across West London, from brighter kitchen diners to full-width garden-facing living spaces.
Shepherd’s Bush Victorian terrace
Before-and-after rear extension transformation with a brighter garden-facing kitchen diner.
Hounslow kitchen island extension
A kitchen-led rear extension with island seating, open-plan dining and glazed rear doors.
Acton garden-facing extension
Rear extension designed with large bi-fold doors, rooflight planning and a strong connection to the garden.
Ealing full-width opening
A garden-facing extension with full-width glazing and a wider family living space.
Chiswick rooflights
Rooflights used to bring daylight into the centre of an open-plan kitchen and dining space.
Hounslow double-storey extension
A rear extension layout that adds ground-floor space while creating extra first-floor accommodation.
Brentford steelwork stage
Structural steel installation and groundworks during a West London rear extension build.
Planning a similar project?
Tell us about your property, garden access and preferred layout, and we can advise on the best rear extension route for your home.
Book a free surveyRelated services
Related Rear Extension Services in West London
Explore related extension services, planning guidance and design-build support for West London homes.
Areas
Areas We Cover in West London
We serve homeowners across West London and nearby areas.
FAQs
FAQs About Rear Extensions in West London
How much does a rear extension cost in West London?
Costs vary by size, access, foundations, drainage, structural steel, glazing, roof design, kitchen specification and finish. A site survey and drawings are needed for a reliable fixed quote.
Do I need planning permission for a rear extension in West London?
Some rear extensions can be built under permitted development, but planning permission may be needed for larger designs, flats, conservation areas, listed homes or properties with previous extensions.
Can I build a rear extension under permitted development?
Possibly. It depends on property type, extension depth, height, eaves, boundaries, previous additions and whether the home has restricted permitted development rights.
Will I need a party wall agreement?
You may need party wall notices if excavation, steelwork or boundary works affect a shared wall or neighbouring property. This is common on West London terraces and semis.
How long does a rear extension take to build?
Site times vary by size and complexity, but planning, drawings, structural design, approvals and party wall matters should also be allowed for before construction begins.
Can I stay in the house during the work?
Many homeowners can stay, but it depends on kitchen downtime, dust, temporary services, safety, access and the level of disruption.
What is the best rear extension for a Victorian terrace?
A rear kitchen extension or rear-and-side-return layout often works well because it improves the narrow ground-floor plan, adds daylight and creates a better kitchen diner.
Do you handle design, structural drawings and Building Control?
Yes. We can help coordinate design drawings, structural calculations, Building Regulations information, Building Control and project management.
Which West London areas do you cover?
We cover Acton, Chiswick, Ealing, Fulham, Hammersmith, Shepherd’s Bush, Hanwell, Hounslow, Brentford, Isleworth, Hillingdon, Uxbridge, Notting Hill, Westminster, Kensington and nearby areas.
Do rear extensions add value?
A well-designed rear extension can improve space, layout and buyer appeal, especially when it creates a bright kitchen diner and better garden connection.
Book your quote
Book Your Free West London Rear Extension Survey
Tell us your postcode, property type and what you want to achieve. We will advise on layout options, planning route, structural work, Building Control, party wall issues and budget drivers.
- Free no-obligation first conversation
- Advice on rear kitchen, full-width and single-storey layouts
- Planning, structure, glazing, fit-out and finish guidance
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Complete the form and our team will contact you to discuss your West London rear extension.
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Ready to plan your West London rear extension?
Speak with a rear extension specialist about your planning route, structure, cost, timescale, kitchen layout and finish options.