Single storey rear extensions with open-plan living and full-width glazing.
Design & build · Groundworks · Drainage · Structural engineering across South West London & Surrey
Design & build · Groundworks · Drainage · Structural engineering across South West London & Surrey
AMTA ARGC · House Extensions
Rear, side return, wraparound and double storey extensions, designed, engineered and built by one team.
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Fully insured
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Overview
Our house extensions in London are designed by our own engineers and built by our own site team. We handle the drawings, structural calculations, planning or permitted development checks and building control, then build the extension from groundworks to final finishes.
We cover 9 councils across South West London and Surrey, and every project is run by one team from survey to sign-off. It is often combined with groundworks and structural & architectural engineering.
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What is included
01
We measure the house, check the ground and talk through layout, budget and timescales.
02
Architectural drawings and structural calculations prepared in-house.
03
Planning or permitted development, building regulations and party wall notices where needed.
04
Foundations, drainage, structure, roof, glazing and finishes, then building control sign-off.
How we work
One team, one point of contact and one programme, from the first site visit to the completion certificate.
01
We visit, measure up and agree the brief, budget and timescales.
02
Drawings and structural calculations by our own engineers.
03
Planning or permitted development, building regulations and party wall help.
04
Our site team builds, with one contact throughout.
05
Final inspections, completion certificate and handover.
Types
Single storey rear extensions with open-plan living and full-width glazing.
Infill the side passage of a terraced house to create a wide, bright kitchen.
Side return and rear extension combined into one L-shaped living space.
Extra space on two floors: bigger ground floor plus a new bedroom or bathroom.
Open-plan kitchen extensions with structure, services and finishes in one contract.
Recent projects
Epsom & Ewell · Rear Extensions
A single storey rear extension with an open-plan kitchen and living space, opening onto a new terrace.
Costs and timescales
Every project is priced after a survey, because ground conditions, structure and finishes vary from house to house. We give you an itemised quote and a written programme, so you know what you are paying for and when each stage happens.
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Areas we cover
We work across nine councils in South West London and Surrey. Choose your area to see local projects, planning notes and how we work there.
Richmond, Twickenham, Teddington, Barnes, Kew
Kingston, Surbiton, New Malden, Tolworth
Wimbledon, Merton Park, Raynes Park, Morden, Mitcham
Tooting, Balham, Wandsworth, Putney, Earlsfield
Epsom, Ewell, Stoneleigh
Hounslow, Chiswick, Isleworth, Brentford
Ealing, Acton, Southall, Hanwell
Dulwich, Peckham, Camberwell, Bermondsey
Croydon, Purley, Coulsdon, South Croydon
Related services
Site clearance, excavation, foundations and basement dig-outs for homes and developments.
Structural calculations, beam design and architectural drawings for planning and building regs.
New foul and storm drainage, inspection chambers and sustainable drainage systems.
FAQs
Straight answers to common questions. See all our FAQs or ask an engineer.
Many single storey rear extensions fall under permitted development, but it depends on size, property type and conservation area status. We check this at the survey.
Usually yes. We keep the existing house weather-tight and plan the noisy work so you can live at home for most of the project.
It depends on size and approvals. We give you a written programme with your quote covering design, approvals and each build stage.
Richmond, Kingston, Merton, Wandsworth, Epsom & Ewell, Hounslow, Ealing, Southwark and Croydon.
Free, no-obligation quote
Send a few details and one of our engineers will call you back to arrange a survey. Prefer to talk now? Call 020 3857 3805.