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ABETA GROUP LIMITED11 BROOKWOOD ROADSOUTHFIELDSSW18 5BLLONDON, UNITED KINGDOM

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Home Extension – ABETA Group
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Residential & Commercial · London

Extensions

Home extensions across London designed to add space, value, and functionality.
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Fully insured & accredited
20+ years combined experience
Warrantied workmanship

What we deliver

ABETA Group designs and builds high-quality home extensions across London, creating additional living space while maintaining the character of your property. From rear extensions to side returns and multi-storey additions, our team delivers exceptional results across Chelsea, Kensington, Fulham and South West London.
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Home Extension – ABETA Group
What's included

Everything under one roof

01

Rear Extensions & Side Returns

Single-storey rear extensions and side return infills that square off Victorian and Edwardian floor plans, opening kitchen and dining space onto the garden.
House Extension in Clapham – ABETA Group
02

Wrap-Arounds & Upper Storeys

L-shaped wrap-arounds combining rear and side return, plus first-floor additions over existing rooms and garages where foundations and walls are verified to carry the load.
03

Structural Openings & Steelwork

Needling, propping and steel goalpost frames on padstones to remove rear walls and chimney breasts, turning cellular ground floors into open-plan living.
04

Glazing & Rooflights

Roof lanterns, structural rooflights, sliding and bifold doors and steel-framed internal screens, sized so the extension pulls daylight deep into the original house.
Home Extension – ABETA Group
05

Matched Brickwork & Roofing

London stock brick sourced to match, mortar mixed to the existing colour and joint, with warm-deck flat roofs in zinc or single-ply and proper parapet detailing.
06

Drainage & Services Integration

Relocated inspection chambers, diverted soil and rainwater runs, and heating, underfloor circuits and power extended from the existing house rather than bolted on.

A clear path from vision to handover

01

Survey & Feasibility

We measure the existing house, dig trial holes to establish foundation depth, trace the drainage runs, and check conservation area, Article 4 and listed building constraints on your address.
02

Design & Approvals

Architectural drawings and structural engineer's calculations are developed together, then submitted as a planning application or lawful development certificate, with a full plans application lodged with building control.
03

Neighbour & Sewer Consents

Party wall notices are served on adjoining owners with a schedule of condition recorded, and where the extension crosses a public sewer we obtain a build-over agreement.
04

Groundworks & Weathertight Shell

Foundations are taken to the depth trial holes and nearby trees dictate, drainage is diverted, openings are needled and propped for steel, then roof and glazing close the shell.
05

Fit-Out & Sign-Off

First and second fix services, insulation, plaster and finishes follow, with building control inspections at each stage and completion, electrical and gas certification issued with the warranty paperwork at handover.

Extensions we're proud of

House Extension in Clapham – ABETA Group
Home Extension – ABETA Group
House Extension in Clapham – ABETA Group
Home Extension – ABETA Group
Why ABETA

Built to a higher standard

Fully insured, with warranties on structural, electrical and gas work, and 20+ years of combined director experience behind every project.
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01

Approvals Run Start To Finish

We run the permitted development or planning route, lawful development certificates, building control submissions, party wall notices and sewer build-over consent, drawing on 20+ years of combined director experience so approvals are cleared before the extension needs them.
02

New Work That Reads As Original

Chelsea, Kensington and Fulham stock is unforgiving, so we match brick, mortar colour and joint, skirting and cornice profiles and floor levels between old and new: the details that decide whether an extension looks added on.
03

Opening Up The Existing House

Needling, propping, steel goal-posts and padstones transfer the load of the original house onto new structure. ABETA Group is fully insured, and warranties are provided on that structural work and on the electrical and gas alterations that follow it.
04

Weathertight Before Break-Through

The new shell is closed in and the break-through left late, with temporary screens and protection, so you keep living in the house while it is extended and one contractor, not three, stays answerable for keeping it dry.
Recent projects

Work across London

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House Refurbishment Fulham

This Fulham project stands as one of our most comprehensive full-property transformations to date. Commissioned as a complete overhaul, our team at Abeta Group managed every discipline from the ground up, expanding the loft, constructing a new basement level, and refurbishing the entire interior to an exceptional standard.
Carpentry ServicesHigh-End RefurbishmentsElectrical Services
Commercial Fit-Out: Estate Agency to Coffee Shop Conversion, Southfields

Coffee Shop Southfields

Brookwood Garden began as a blank canvas, a dated estate agency unit on our doorstep in Southfields that required a complete reinvention. Abeta Group was brought in to deliver an end to end commercial transformation, converting the space into a vibrant, fully operational coffee shop with a distinctive character and a seamless guest experience
Carpentry ServicesHigh-End RefurbishmentsElectrical Services

Extensions across London

Available throughout West, Central and South West London. Choose an area to see local expertise.
Balham
Barnes
Battersea
Central London
Chelsea
Clapham
Earls Court
Earlsfield
Fulham
Hammersmith

Extensions FAQs

We build extensions across Chelsea, Kensington, Fulham, South West and Central London, covering rear extensions, side return infills, wrap-arounds and upper-storey additions on period terraces, semi-detached houses and converted flats. If you are just outside these areas, it is still worth getting in touch.

Many single-storey rear extensions fall under permitted development, but conservation areas, Article 4 directions, listed buildings and flats change that. We review the constraints on your address first, then submit either a planning application or a lawful development certificate so the position is documented either way.

Usually, yes. Excavating near a neighbour's foundations or building off a shared wall triggers notices under the Party Wall etc. Act 1996. We prepare the drawings the surveyor needs, serve notices early and record a schedule of condition before any work starts on site.

It is common on London terraces and rarely a dealbreaker. Depending on the run, we either divert the drainage, relocate the inspection chamber, or apply for a build-over agreement with Thames Water. We trace the drainage during the initial survey, not once the foundations are open.

The programme depends on size, foundation depth and approvals such as party wall awards, so we issue dated milestones before starting rather than a guessed figure. Staying in the house is usually possible: we make the new structure weathertight before breaking through, with dust screens and protected access throughout.

We quote from measured drawings and structural calculations rather than a rough floor area, so the price reflects real foundation depths, steel sizes and glazing specification. The itemised quote separates groundworks, structure, roofing, services and finishes, with any variation priced and agreed before we proceed.

ABETA Group is fully insured, and warranties are provided on structural, electrical and gas work. At handover you receive the building control completion certificate along with the electrical and gas certification for the new circuits and pipework serving the extension.

Ready to start your project?

Tell us about your property and goals. We'll arrange a site visit and provide a detailed, transparent quotation with no obligation.
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+447715584977
Home Extension – ABETA Group