London · Building & conversions

Builders in London

Phone numbers for builders covering London — extensions, loft conversions and refurbishment. Open a profile and call the business yourself. This site does not send your job.

Extensions and loft work need more than a day rate. The renovation budget tool can sit beside a local quote. In London, parking, access and conservation rules often sit beside the labour figure. London and the South East often sit 10–25% above a national cost band. Profiles show a name, the area they cover and a phone number. Public qualifications such as Gas Safe or NICEIC appear only when they are on the profile. Read the cost notes for a sourced national range; a figure on a card is not a quote.

Businesses on this list

30 businesses on this list.

Building & conversions · London

Grange Farm Cottages, Brigg Lane, Selby YO8 8HD

Full-package building with in-house trades

Advertised no deposit and no upfront payment. Free quotes.

01757 618067Open profile

Building & conversions · London

Bethnal Green / East London (E2 / E8)

Conversions and extensions, brickwork, plastering and tiling, painting, kitchens and bathrooms, roofs, drainage. Gas and electrical qualifications

Quote on request.

07307 209051Open profile

Building & conversions · London

London (west, north-west, south-west and central London)

New builds, conversions and extensions, brickwork, plastering and tiling, painting, kitchens and bathrooms, roofs, foundations and drainage

Quote on request.

07307 286232Open profile

Building & conversions · London

London E4 9EL (Waltham Forest)

Structural repairs, extensions and conversions, brick, timber, tile and paint, kitchens and bathrooms, roofs, doors and windows, NICEIC electrical

Quote on request.

07360 498708Open profile

Building & conversions · London

London (Finsbury / Bloomsbury / City)

New builds, extensions and conversions, brickwork, plastering and tiling, painting, kitchens and bathrooms, roofs, foundations and drainage

Quote on request.

07360 275460Open profile

Building & conversions · London

78 York Street, London W1H 1DP

Small plumbing and electrical jobs, boilers, installations, general handyman work. Same-day or next-day small jobs

First 30 minutes £60 + VAT, then £30 + VAT per 30 minutes. No call-out fee.

020 7099 9199Open profile

Building & conversions · London

Riverbank House, 1 Putney Bridge Approach, London SW6 3JD

Extensions, lofts, whole-house refurbishment, roofs, tiling and painting, electrical, plumbing, joinery and plastering

Quote on request.

020 8087 2697Open profile

Typical building & conversions costs

Extension and loft figures move with structure, access and finishes more than with a national average. Use the renovation budget tool to split labour, materials and contingency, then ask for a written package from a local firm.

A local rule to check in London

Many extensions, loft conversions and structural openings need building control, and some need planning. A listing is not an approval and not a party-wall agreement. Victorian terraces, mansion blocks and conversion flats are common, so access and waste often matter as much as the trade itself.

Questions before you phone

How do I find builders in London on this list?

This page is the London building & conversions list. Names, service areas and contact details sit on the cards. Open a profile and contact the firm yourself. Change the city or trade at the top to open a different list.

Does this page send my job to builders in London?

No. The names and contact details are printed here so you can make contact yourself. This site does not email or text anyone on your behalf.

What should I check before I phone a London building & conversions firm?

Many extensions, loft conversions and structural openings need building control, and some need planning. A listing is not an approval and not a party-wall agreement. In London, parking, access and conservation rules often sit beside the labour figure. London and the South East often sit 10–25% above a national cost band.