Our own trades · No subcontractors · 212 jobs since 2013Free survey in 48 h·Nothing added without your say-so·Same faces to the endOur own trades · No subcontractors · 212 jobs since 2013Free survey in 48 h·Nothing added without your say-so·Same faces to the end
HA1 to HA9 · surveyed inside 48 hours
House extensions in Harrow, drawn and built by one firm
Single storey, side return, loft and garage conversions across Harrow and the HA postcodes — surveyed inside 48 hours, drawn in-house and taken through Harrow Council building control by the people who build it.
Most of Harrow was built between the wars, and that decides what you can add
The HA postcodes are mainly interwar semis and short terraces on generous plots — which is why side returns and rear extensions do so well here, and why party wall work comes up on nearly every job. We survey the plot, the drains and the neighbour before anyone draws a line.
01Side returnFilling the alley beside the kitchen. The cheapest metre of floor you will ever buy on a Harrow semi, and it usually needs a party wall award.
02Rear extensionSingle storey across the back, often with the kitchen moved into it. Permitted development covers more than people expect — we check before suggesting a planning application.
03Wrap-aroundSide return and rear together. One programme, one invoice, and the drains usually need re-routing.
04Garage conversionThe quickest room in the house. Damp-proofing and a proper floor build-up are what separate a room from a cold store.
Do I need planning permission in Harrow?Often not. Single-storey rear extensions within the permitted development limits do not, unless you are in a conservation area or the house has had its rights removed. We check the title and the council record on the first visit and tell you which route you are on.
How long is a single-storey extension?Eight to fourteen weeks on site for most Harrow rear extensions, depending on groundworks and the kitchen. You get the programme on paper before we start.
Who deals with the neighbour?We do. Party wall notices, the award, and the schedule of condition. It is in the price, not an extra.
The yard is fifteen minutes away, not fifteen miles
Preston Hill, HA3. Materials come off our own racks, the skip is ours, and a foreman can be at your door the same week. We cover HA1 to HA9 — Harrow, Wealdstone, North and South Harrow, Harrow Weald, Pinner, Stanmore, Edgware, Kenton and Wembley — and we go further out — Watford, St Albans, Barnet and beyond — where the job is worth the drive. Ask, and Joe will tell you straight whether we can do it properly from here.
A JOB DOWN THE ROAD[ Street or area, month and year ][ Three or four lines from Ruth: what the house was, what we did, what it cost roughly, what the customer said. This is the part Google cannot get anywhere else — keep it specific and true. ]Slot to fill before this page goes live.
Where we workHarrow, north-west London and the rest of the capital, plus Herts, Bucks, Middlesex and Berks inside 40 miles of the yard.Registered office59 Preston Hill, Harrow HA3 9SB. Visits by appointment.The companyCraftBuilt is a trading name of GROVE TREECORE LTD, registered in England & Wales, company no. 16004706.CoverFully insured — certificates on request.
Free first visit and feasibility
