Design & build · Groundworks · Drainage · Structural engineering across South West London & Surrey

AMTA ARGC · Conversions

Garage and Basement Conversions in London

Garage and basement conversions that add usable living space to your home.

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Single storey garden building with aluminium bi-fold doors and gravel surround

Overview

Conversions: designed, engineered and built in-house

A garage conversion in London is one of the quickest ways to add a room without extending. We also convert existing basements and cellars. Our engineers check the structure, insulation and damp-proofing so the new room meets building regulations.

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 house extensions and basement excavation.

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What is included

What is included in our conversions service

01

Feasibility

We check the structure, floor levels and planning position.

02

Design

Layout, insulation, ventilation and structural changes.

03

Build

New walls, windows, insulation and services.

04

Finish and sign-off

Decoration and building control completion.

How we work

From first survey to building control sign-off

One team, one point of contact and one programme, from the first site visit to the completion certificate.

01

Survey

We visit, measure up and agree the brief, budget and timescales.

02

Design

Drawings and structural calculations by our own engineers.

03

Planning & building control

Planning or permitted development, building regulations and party wall help.

04

Build

Our site team builds, with one contact throughout.

05

Sign-off

Final inspections, completion certificate and handover.

Recent projects

Recent projects

Costs and timescales

Conversions 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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What affects the price

Areas we cover

Areas we cover for conversions

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

Related services

FAQs

Conversions FAQs

Straight answers to common questions. See all our FAQs or ask an engineer.

Often not, but some estates removed permitted development rights. We check before design starts.

No. We focus on garage and basement conversions, extensions and groundworks.

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

Get a free quote for conversions

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.