Builders in Epsom, Ewell, Ashtead, Esher & Cobham

Excel Construction carries out extensions, loft conversions, new builds and refurbishments in Epsom, Ewell, Ashtead, Esher and Cobham, managed by one main contractor.

Building work we do in Epsom, Ewell, Ashtead, Esher and Cobham

• Large rear and side extensions on bigger plots.
• Loft conversions and dormers.
• New builds and knock-down rebuilds.
• Full refurbishments, including kitchens and bathrooms.
• Zinc and aluminium roofing and flat roof work.

Building on local homes

Homes here tend to sit on larger plots than in inner London. Epsom and Ewell have many interwar and 1930s detached and semi-detached houses, Ashtead has a mix of period and mid-century homes, and Esher and Cobham are known for substantial detached houses, which often prompts larger extensions or knock-down rebuilds. Some properties sit in or near the Green Belt, which affects how far a home can be enlarged.

Area notes: what we see in each town

Epsom and Ewell

Many interwar and 1930s detached and semi-detached houses on good-sized plots, which suit larger rear and side extensions and lofts.

Ashtead

A mix of period and mid-century homes. Ashtead falls under Mole Valley, so its planning policies apply rather than Epsom and Ewell.

Esher and Cobham

Substantial detached homes on large plots, where owners often choose major extensions or knock-down rebuilds. Elmbridge Borough Council is the planning authority.

Planning and permitted development

The planning authority depends on the town: Epsom & Ewell, Mole Valley (for Ashtead) and Elmbridge (for Esher and Cobham). Each has its own policies, and Green Belt rules, conservation areas and tree preservation orders can all apply. We check which ones affect your site before design work begins.

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 build a large extension in the Green Belt?

Green Belt policy limits how much a home can be enlarged, so size matters. We assess your site against the council’s rules before drawing.

Do you do knock-down rebuilds in Esher and Cobham?

Yes. We carry out new builds, and you can read our new build cost guide for typical budgets.

Get a free quote in Epsom

Planning work in Epsom, Ewell, Ashtead, Esher and Cobham? Contact us for a free site visit and quote, or see all the areas we cover.

Nearby areas we cover: Sutton, Cheam and Wallington, Kingston and Surbiton, Reigate and Tadworth.