Builders in London — Construction & Refurbishment Contractor
A single accountable London contractor for home renovations, extensions, commercial fit-outs and planned maintenance across every borough.
Haarth is a CHAS-accredited London builder delivering home renovations, kitchen and bathroom fit-outs, extensions and commercial refurbishment across every London borough. Every project runs with an in-house team, a named project manager, a fixed written quote and a 12-month workmanship guarantee.
London builders you can trust
Working in London brings its own challenges: parking suspensions, restricted access, listed buildings, leasehold consents, party walls and neighbours on every side. Haarth's London teams work across the capital every day and know how to plan projects around those constraints — from securing footway permits and skip licences through to phasing works so shared entrances stay usable.
Whether you're a homeowner in Chelsea, a landlord in Hackney, an office tenant in the City or a school in Croydon, you get the same accountable delivery model: one project manager, in-house trades, a fixed price and a written programme.
Areas of London we cover
We work across all 32 London boroughs and the City of London, with regular projects in:
- Central London — Westminster, Camden, Islington, City
- North London — Barnet, Enfield, Haringey
- East London — Hackney, Tower Hamlets, Newham, Havering, Barking & Dagenham
- South London — Southwark, Lambeth, Wandsworth, Lewisham, Greenwich, Croydon
- West London — Kensington & Chelsea, Hammersmith & Fulham, Ealing, Hounslow
Services delivered across London
Every service Haarth provides nationally is available across London, delivered by London-based teams:
- Home renovations and full house refurbishments
- Kitchen and bathroom renovations
- Loft conversions, extensions and side-returns
- Commercial refurbishment and office fit-outs
- Planned maintenance and responsive repairs
- Fire safety works and passive fire protection
- Void property refurbishment for landlords and housing providers
Why London clients choose Haarth
Every project runs under a single fixed quote with no charge for parking, permits or waste — all included from the start. Our London site teams are directly employed, DBS-checked where relevant and inducted on Haarth's safe systems of work.
We're CHAS accredited, fully insured, and every project is signed off with a 12-month workmanship guarantee alongside any manufacturer warranties on materials and appliances.
Our process
- 1EnquiryCall, WhatsApp or request a quote — we respond within one working day.
- 2Free London surveyOn-site survey within 5 working days across any London borough.
- 3Fixed quoteWritten, itemised quote — parking, permits and waste included.
- 4DeliveryIn-house London teams under a named project manager, weekly written updates.
- 5HandoverJoint snagging walk-through and 12-month workmanship guarantee.
Frequently asked questions
Which London boroughs do you cover?
Haarth covers all 32 London boroughs and the City of London, from Havering and Bexley in the east to Hillingdon and Richmond in the west.
Do you handle parking permits and skip licences?
Yes. Every Haarth London quote includes parking suspensions, footway permits and skip licences where needed — you never receive a separate bill for site access.
How quickly can you start a project in London?
Small refits typically start within 2–4 weeks of quote acceptance. Larger renovations start within 4–8 weeks depending on design, consents and lead-times.
Do you work on listed buildings and leaseholds?
Yes. We regularly work on listed and conservation-area properties, and we routinely obtain landlord's consent for leasehold flats.
Are you CHAS accredited and insured?
Yes. Haarth Ltd is CHAS accredited, holds full public liability, employers' liability and contract works insurance, and every project is backed by a 12-month workmanship guarantee.
Ready to start your project?
Book a free on-site survey. Fixed written quote within 48 hours.