Building work in Edgware: area guide

This is our area guide to building work in Edgware (HA8, Barnet and Harrow): the housing, the council rules that apply (Barnet Council or Harrow Council for planning) and every service we offer here. For whole-house refurbishment go to Home renovation in Edgware.

Plots in Edgware are generous by London standards, and the semis and detached houses spreading out from Edgware station and towards Canons Park were built to regular spans with straightforward geometry. That makes the structural side of HA8 work more predictable than in an inner London terrace, so the job usually names itself: an opening, a rear room, a new kitchen. What is less predictable is what previous decades left inside the fabric. GS Renovation surveys properly before quoting, appoints the structural engineer where a design is needed, and coordinates the building control applications and inspections throughout.

Take the 18,930 or so homes the valuation list gives Edgware: 38% flats, 62% houses, 2% from before 1919, 57% interwar and 41% post-war. VOA Council Tax stock of properties, March 2025, for all 5 statistical areas in Edgware. Counts rounded by the VOA.

Opening up the ground floor of a suburban Edgware house starts at the spine wall

The change most Edgware owners want is the same one: lose the wall between the back rooms, bring the kitchen and dining space together, and get glazing across the rear. That is a load-bearing wall removal job before it is a kitchen renovation. The spine wall carries first floor joists and often a chimney breast above, so a structural engineer specifies the section, the bearing lengths, the padstones underneath and the temporary support used while the masonry comes out. We build to that drawing and nothing else. Regular spans mean the answer is usually clean, but it is still an answer that has to be calculated.

Two-leaf construction demands care that solid brickwork never asks for. The wall ties are checked wherever masonry is disturbed, any debris bridging the void at the base of a wall is cleared while it is accessible, and the moisture path around every new opening is resolved so the outer leaf keeps doing its job. Barnet Council building control, or Harrow Council's on the Canons Park side, sees the steelwork, the bearings and that weathering detail while they are still exposed, so those inspections are scheduled into the programme rather than squeezed around it.

What older suburban houses tend to hide before anything is built over them

Textured decorative coatings on ceilings, cement sheet roofing on a garage or outbuilding, old flue components and some floor tiles and bitumen adhesives from the middle of the last century may all contain asbestos. None of it is a reason to panic and most of it is harmless while undisturbed, but an opening or a home renovation disturbs things by definition. The correct order is to identify suspect materials at survey stage, have them tested where there is doubt, and arrange properly licensed removal where required, before demolition begins rather than in the middle of it.

The other recurring find is a rear addition or conservatory built cheaply somewhere between the sixties and the nineties, on foundations that would not be accepted today, with a flat roof patched more than once. A first floor house extension job over that structure is rarely possible without addressing what is underneath, and it is far better to know before the design starts. We open up and look, then tell you plainly what the structure will and will not support, so the decision gets made on evidence rather than optimism and the engineer has something real to design against.

Where to go next for work in Edgware: house extensions in Edgware, the Barnet area guide, building work in Stanmore, building work in Mill Hill and Building Regulations Explained.