Open-Plan Conversions Wembley

GS Renovation creates open-plan living across Wembley, opening up the compartmentalised ground floors of 1930s and interwar semis into single, connected spaces. We take out the dividing walls, install the steelwork and turn the old front room, dining room and galley kitchen into the kitchen-diner these generous plots were made for.

In Wembley, a knock-through finished as one room typically costs £3,000 to £8,000 or more, including the steel beam (indicative London ranges, MyBuilder and Checkatrade, 2026). GS Renovation Ltd, a building contractor based in Potters Bar, does the work in Wembley: the structural engineer we appoint designs the steel, we install it, and building control signs it off.

How the job runs

1. Free site survey at your Wembley address, covering the walls, services and floor levels, and an itemised quote.
2. The engineer we appoint sizes the beam, and the work is registered with Brent Council building control or an approved inspector. On a shared wall you serve the party wall notice as building owner; we supply the drawings.
3. Props in, opening cut, beam on padstones; then floors, heating and electrics are joined up.
4. Building control inspects the steel before it is covered. We finish the room, and the completion certificate follows.

Open-plan conversions in Wembley semis

The interwar semis around Wembley were designed as a set of small, separate rooms, which suited the 1930s but leaves today's families short of connected space. The classic Wembley project is a knock-through: removing the wall between the front reception and rear dining room, then linking the kitchen to make one bright kitchen-diner. Where you want zones without a full knock-through, a broken-plan layout or a Crittall-style glazed divider keeps light flowing while defining a cosier snug.

The dividing wall between those rooms is usually the load-bearing spine, carrying the floor joists above, so it cannot simply come out. A structural engineer sizes a steel beam to span the new opening, and we set it onto padstones, prop the floor above temporarily, remove the wall in stages and lift the steel in before the props come away. The result is an open ground floor that stays structurally sound.

Housing in Wembley

Roughly 17,140 dwellings sit on the valuation list for Wembley. 29% are houses and 71% flats, and by age 12% predate 1919, 25% are interwar and 63% post-war. Where most homes are flats, opening up a flat in Wembley changes its fire escape route, which building control checks.

Opening up a Wembley flat without losing its protected hallway

71% of Wembley's homes are flats, and a newer flat is often already open plan, with the kitchen in the living room. The request is then usually the next step: taking in the entrance hall, or a second bedroom, to make one larger room. That is where fire safety changes. In many flats the hall is the protected route from the bedrooms to the front door, and removing its walls means the escape passes through the kitchen. Building control then needs another answer, such as a sprinkler or mist system or a different layout, and the building's fire strategy may not allow it.

So plan the paperwork first. Brent Building Control takes either a full plans application or, in certain circumstances, a building notice, and for a flat where the escape route changes, a full plans submission lets the fire approach be agreed before anything is removed. Brent aims to respond to a full plans application within three weeks. In a Wembley block, send the same drawings to the managing agent in parallel, because their fire consultant may have conditions, and a scheme that satisfies building control but not the freeholder still cannot be built.

Consents and sign-off across HA9

Opening up the inside of a Wembley semi is controlled under the Building Regulations, not planning permission. You do not need planning consent for an internal knock-through in HA9, conservation area or not, unless the house is listed, when listed building consent is needed. What matters is building control: Brent Council inspects the beam, the padstones and the bearings and issues the completion certificate that confirms the work was done properly.

Where the spine wall meets the party wall shared with the neighbouring semi, or a beam bears into that shared wall, the Party Wall Act applies and you serve notice on the neighbour as building owner before we start, using the drawings we supply. We coordinate the engineer's design, the steelwork and the building control inspections as one continuous job, keeping the dust down and the house liveable while your separate rooms become a single open-plan space.

• Utility and boot room space carved out of the new layout
• Steel beam installation to remove the dividing wall
• Knock-throughs between front and rear reception rooms

VOA Council Tax stock of properties, March 2025, for Wembley North, Wembley West, Wembley East and Wembley Park. Counts rounded by the VOA.

When comparing open-plan conversion in Wembley with other work, it helps to read home renovation in Wembley, open-plan conversion across Brent, builders in London, converting a garage into living space, open-plan conversion across London and Knock-Through Guide.

Why Wembley Homeowners Choose GS Renovation

Wembley homeowners choose GS Renovation for open-plan conversions because one accountable team delivers the whole thing. We appoint the structural engineer, install the steel to the engineer's sizing, give you the drawings for any party wall notice you serve, arrange Brent Council building control and finish neatly. You get a properly engineered, certified open-plan ground floor in your HA9 semi, with tidy working, backed by our founder's 30+ years on the tools.

Reviewed jobs near Wembley

1 MyBuilder review from Wembley, with each customer's own job title:

• Install new worktop, Wembley, 10 Jul 2024 (5 out of 5)

Read all 31 on our reviews page.

Checked by Abdelaaziz Saaid, founder and director of GS Renovation Ltd (Companies House no. 14611254). Structural design is by the consulting engineer appointed to your project.