Structural Alterations Brent

From new openings to replacement joists and supported openings, GS Renovation carries out structural alterations throughout Brent's mansion blocks, period flats and houses. We build the steelwork to the engineer's design behind knock-throughs, widened doorways and reinforced floors in Wembley, Willesden and Kilburn, all inspected and signed off by building control.

In Brent, a simple new opening starts from £1,500, and underpinning a single elevation typically costs £6,000 to £21,000 (indicative London ranges, MyBuilder and Checkatrade, 2026). GS Renovation Ltd, a building contractor based in Potters Bar, does the work in Brent.

How the job runs

1. Free site survey at your Brent address and an itemised quote.
2. The engineer we appoint designs the work, and it 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 and any trial holes first, then the opening, joists or underpinning in the engineer's sequence.
4. Building control inspects each stage before it is covered, then issues the completion certificate.

Structural alterations for Brent period flats

Structural alterations in Brent cover far more than knocking through: new openings between rooms, replacement joists where old timber floors have deflected, supported openings for wider doorways, and occasionally underpinning where a ground-floor flat has movement. In the borough's purpose-built period flats, original floor structures can be a century old, so we always start with an engineer's inspection rather than assumptions about what lies behind the plaster.

When an alteration removes or reduces support, the engineer we appoint specifies the steel and the padstones it bears onto, and we prop the surrounding structure before any cutting begins. Openings are formed in staged sequence so nothing is ever left unsupported, and new joists are hung and levelled to carry the floor above. Every element is designed by the engineer to the Building Regulations and inspected by Brent Council's building control before completion.

Housing in Brent

On the valuation list Brent counts about 135,080 homes, 62% flats and 38% houses; 28% predate 1919, 32% are interwar and 40% post-war. Most homes here are flats, and structural repair to a block in Brent usually falls to the freeholder.

Lining up Brent approvals so none of them lapses

A structural alteration in Brent often mixes internal work with a change to the outside, such as a new opening in a flank wall or a rebuilt rear wall, and each part has its own clock. Where the outside changes, Brent's pre-application advice is a sensible first step, and Brent aims to respond to householder enquiries within 20 working days of receiving the enquiry and fee. That is advice, not permission, so any planning application the answer calls for comes next. The full plans application for the structure follows, and Brent Building Control aims to respond within three weeks. Run one after another, these steps take weeks, so start them before booking the trades.

The approval then has a shelf life. Approved building control plans in Brent are valid for three years, after which a new application and fee are needed if work has not started. That catches phased jobs: underpinning one summer, new openings a year or two later, a second phase put off again. Starting the approved work inside the three years keeps it alive. Leaving it means the structural engineer we appoint may have to reissue calculations against current rules, and Brent Building Control starts again from a fresh application, so put the start of the first phase in the diary on the day approval arrives.

Consents and neighbours in Brent

Internal structural alterations are governed by the Building Regulations, not planning permission, so there is no planning application for a new opening inside your NW6 or HA9 flat. Planning only enters the picture where the outside changes, but a listed home needs listed building consent for internal work too. What does apply to almost every Brent flat is the leasehold requirement for the freeholder's licence to alter, which we obtain before work starts.

Because flats sit above and below one another here, alterations near a party structure shared with a neighbouring home can be notifiable under the Party Wall Act, and you, as building owner, serve the notices where required, using the drawings we supply. We coordinate with the managing agent on access and working hours, protect communal areas, and keep dust contained. You are left with a sound structural change that respects the block and its residents.

• Steel goalpost and portal frames to the engineer's design
• Building control applications, inspections and the completion certificate
• New door and window openings in solid masonry

VOA Council Tax stock of properties, March 2025, for all 35 statistical areas in Brent. Counts rounded by the VOA.

If you are weighing up options for your Brent property, it is worth reading home renovation in Brent, our Brent area guide, a main building contractor in London, when a wall needs underpinning, structural alterations anywhere in London and Floor Joist Repair.

Why Brent Homeowners Choose GS Renovation

Brent homeowners choose GS Renovation for structural alterations because one team owns the whole job: engineer's design, freeholder consent and Brent Council building control, plus the hands-on steelwork and making good. Our founder's 30+ years of work mean tidy, staged working and a signed-off, properly supported result.

Reviewed jobs near Brent

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.