jsmasterbuilders — builders in London

What jsmasterbuilders does — and what it typically costs in London

Every job below can be priced from this page. The ranges are what London homes typically pay, from Locufy's price guides. jsmasterbuilders confirms the exact figure in a written quote — asking is free, with no obligation.

Building & extensions

BuilderGeneral building work

£180–400per dayprice guide →

House extensionSingle or two-storey

£1,800–4,000per m²price guide →

Loft conversionAttic into a usable room

£30,000–95,000per projectprice guide →

Garage conversionGarage into living space

£10,000–30,000per projectprice guide →

Conservatory installerSupplied and built

£8,500–32,000per projectprice guide →

BricklayerWalls, piers and repairs

£200–380per dayprice guide →

GroundworksFoundations, drainage and levels

£2,500–15,000per projectprice guide →

Kitchens, bathrooms & interiors

Kitchen fitterUnits, worktops and appliances

£6,000–25,000per kitchenprice guide →

Bathroom fitterStrip out and full refit

£4,000–15,000per bathroomprice guide →

Wet room installerTanked and fully tiled

£5,000–15,000per roomprice guide →

TilerFloors and walls

£30–100per m²price guide →

PlastererSkimming and patch repairs

£200–700per roomprice guide →

Carpenter & joinerDoors, frames and fitted joinery

£180–400per dayprice guide →

Flooring installerWood, laminate and vinyl

£18–70per m²price guide →

Roofs, walls & windows

RooferPitched roofs and repairs

£150–2,000per jobprice guide →

Flat roofingFelt, rubber and fibreglass

£1,200–6,500per roofprice guide →

Roof repairSlipped slates and leaks

£150–1,000per repairprice guide →

Guttering installationNew gutters and downpipes

£400–1,600per jobprice guide →

Fascias & soffitsReplace rotten timber boards

£1,400–4,500per jobprice guide →

Window & double glazing installerSupplied and fitted

£350–1,500per windowprice guide →

Damp proofingSurvey and treatment

£500–4,000per jobprice guide →

Typical prices from Locufy's UK 2026 price guides — each guide explains what the job involves and what moves the price. Rendering and insulation installer are also offered, priced on survey.