Builders in Putney

The streets either side of the high street are mostly late Victorian and Edwardian terraces. Many have a narrow side return beside the back addition, a long garden and a roof with space to use. Further up the hill the houses get bigger, often semi detached or detached, with room to extend at the side as well as the back.

Older houses here hold the usual surprises once the walls are open: old wiring, lath and plaster ceilings, thin walled rear additions and, on the sloping streets, a change in level between the house and the garden. We survey properly at the start so these show up in the design and the price, not halfway through the build.

Most Putney kitchen extensions fill the side return, run across the back of the house, or do both as one wraparound room facing the garden. Our guides compare a rear extension or side return, show wraparound extension ideas and explain kitchen extensions on exactly this kind of terrace. On a larger semi there is often room for a side extension or a two storey extension as well.

Our house extensions page sets out how we take an extension from survey to handover, and you can try a side return, a rear extension or a loft on a home like yours in our free extension planner.

On a Putney terrace the usual loft conversion is a rear dormer, which adds a bedroom and a bathroom without taking any garden. On a semi detached house, a hip to gable loft conversion straightens the sloping side of the roof and makes room for a proper staircase. Our guides cover Victorian loft conversions and adding an en suite in the loft, and our loft conversions page explains which type suits which roof.

If you own a top floor flat in a mansion block, our guide to mansion block loft conversions explains what is involved before you speak to the freeholder.

Putney is in the London Borough of Wandsworth, so planning applications here go to Wandsworth Council. Several parts of Putney are conservation areas, and the rules there are tighter. A dormer loft conversion in a conservation area is not permitted development and needs planning permission, and the front of the house is looked at much more closely than the back. Flats and maisonettes have no permitted development rights at all, so any extension to a flat needs an application.

We check the position for your address at the start, prepare the drawings and supporting information, and manage the application. On a terrace or a semi the work usually needs party wall agreements with the neighbours as well, and we plan that into the programme.

Typical London jobs priced on our estimator in October 2026, ex VAT and indicative rather than a quotation:

• A single storey extension of about 20 m² of new floor, flat roofed, plus making good the room it joins: around £57,000.
• A rear dormer loft conversion: £68,000 to £81,000.
• New above ground space at a standard specification: £2,650 to £2,900 per square metre of new floor.

Kitchen units, worktops and appliances are priced separately. Our minimum for a complete extension project, including finishes and fittings, is around £85,000. The full breakdowns are in our house extension cost guide and loft conversion cost guide, and the free estimate prices your own project in two minutes.

Our office is in Chiswick, a short drive from Putney. Just across the river in Fulham we designed and built Ellerby Street, a 450 square metre Victorian house, and in Wimbledon we turned two flats back into one house and added a loft with three bedrooms and two bathrooms at Woodside. For homes nearer Wandsworth, see our page on builders in Wandsworth.

Every project runs as one design and build service, with a single team responsible from the first concept to the final finishes. We carry £10M public and employers' liability cover, plan each job in clear stages, and keep the site tidy and considerate, which matters on Putney's busy residential streets.