Builders in Chelsea, Fulham & Kensington

Excel Construction carries out extensions, loft conversions, basements and high-specification refurbishments in Chelsea, Fulham and Kensington, with one main contractor responsible from design to handover.

Building work we do in Chelsea, Fulham and Kensington

• Rear and side return extensions.
• Loft conversions and dormers.
• Basement and lower-ground-floor work where policy allows.
• Full refurbishments to a high finish.
• Structural alterations and open-plan reconfigurations.

Building on local homes

Chelsea, Fulham and Kensington are mostly Victorian and Edwardian terraces, mews houses and period townhouses, with a high number of flats. Space is tight, access is difficult and neighbours are close, so careful logistics, noise control and party wall planning matter as much as the build itself.

Area notes: what we see in each town

Chelsea

Period terraces, mews houses and townhouses, with many streets in conservation areas. Access, parking and neighbours need careful planning.

Fulham

Victorian and Edwardian terraces that suit side return extensions, rear dormers and full refurbishments.

Kensington

Large period houses and flats, some listed. Basement and roof work are tightly controlled, so check what is allowed before design.

Planning and permitted development

The Royal Borough of Kensington and Chelsea has dozens of conservation areas, and it applies its own policy to basement development, which limits their size and extent. Fulham is covered by Hammersmith & Fulham. We check the planning position at the start so there are no surprises later.

For more detail, read our guide to loft conversion planning permission in London and Surrey.

How a project works with us

1. Free site visit. We look at the house, listen to what you want and talk through options.
2. Design and approvals. Drawings, structural design, planning where needed, building control and party wall notices.
3. Fixed written quote. A clear price, with a named project manager.
4. Build. Our own team carries out the work, managed by one main contractor.
5. Handover. A final check with you before you move back in.

What does it cost?

Every project is priced after a site visit, but our guides explain typical 2026 costs. See the house extension cost guide, the new build cost guide, the flat roof cost guide, the loft conversion cost guide and the kitchen extension cost guide. You can also read about our extensions, loft conversions and new builds.

Why homeowners choose Excel Construction

• One main contractor, so there is no chasing separate trades.
• Around 20 years of experience and a team of around 24 operatives.
• Clear written quotations and a named project manager.
• Party wall notices, drawings and building control handled for you.

Questions homeowners ask

Can I add a basement in Kensington or Chelsea?

Possibly, but the Royal Borough has specific policies that limit the size and extent of basements. We advise on what is realistic before you spend on design.

How do you manage disruption on tight London streets?

We plan deliveries, skips and working hours early and keep the site tidy, in line with council and neighbour requirements.

Get a free quote in Chelsea

Planning work in Chelsea, Fulham and Kensington? Contact us for a free site visit and quote, or see all the areas we cover.

Nearby areas we cover: Clapham and Kennington, Putney and Richmond, Battersea and Wandsworth.