Knocking through to create an open plan kitchen or living space is one of the most popular home improvements in Brighton and Hove, and one of the most misunderstood. The short answer is yes, removing a load bearing wall almost always needs Building Regulations approval, even though it rarely needs planning permission. Here is how the process actually works, what it costs and where people get caught out.
Removing or altering a load bearing wall is classed as a structural alteration under the Building Regulations 2010, so it must be signed off by building control regardless of whether the wall is internal or external. This applies to every house and flat in England, and it is separate from planning permission, which you will not normally need for internal works unless the property is listed.
Plenty of people confuse the two and assume that because no planning application is required, no paperwork is required at all. That mistake usually surfaces years later when a solicitor asks for a completion certificate during a sale. Without one, buyers' lenders can refuse to proceed, and you may end up paying for a regularisation application plus opening up work so an inspector can see the beam.
For a straightforward knock through, most builders use the building notice route. You notify building control at least 48 hours before work starts, pay the fee, and an inspector visits at key stages, typically once the beam is in and its bearings are visible, and again at completion. In Brighton and Hove you can apply through the council's building control team or use a private approved inspector; both routes end with the same completion certificate.
Before anyone picks up a breaker, you need structural calculations from a structural engineer. These specify the beam, usually a steel, its size, the padstones it sits on and any temporary propping. Expect to pay roughly £300 to £700 for calculations on a single opening in the Brighton area, and £250 to £500 for the building control fee depending on the route and the scope of work.
The work itself means propping the floors and walls above with adjustable steel props, cutting out the wall, lifting in the beam onto padstones, then making good the plaster, flooring and skirting where the wall stood. In a typical Victorian or Edwardian terrace, of which Brighton has thousands, a single storey knock through usually takes two to four days on site.
Costs depend on the span, whether the beam needs a crane or can be handled in sections, and how much making good is involved, but a realistic range for a standard opening in this area is £1,500 to £4,000 including the steel, labour and plastering. Wide spans, walls carrying two storeys, or chimney breast complications push that higher. Fire protection matters too: an exposed steel normally needs plasterboarding or intumescent treatment to give it 30 minutes fire resistance, and the inspector will check for it.
If you live in one of Brighton's many converted flats, there are extra layers. You will usually need your freeholder's consent under the lease, and if the wall sits on or near the boundary with a neighbouring flat or house, the Party Wall etc. Act 1996 may require you to serve notice on your neighbours before work starts. Party wall matters are a civil issue between owners, so building control will not police them, but ignoring them can lead to an injunction stopping the job.
Listed buildings, common in the city's conservation areas around Kemptown, Clifton Hill and the North Laine, need listed building consent for internal structural changes on top of Building Regulations approval. If in doubt, a quick call to the council's heritage team before commissioning drawings can save a lot of wasted money.
Walls that run perpendicular to the floor joists above, sit directly under another wall, or support the roof structure are usually load bearing, but appearances can deceive, especially in altered older houses. A structural engineer or experienced builder can confirm it, often within a short visit.
Legally no, and practically it is a false economy. The council can require you to open up or reverse unauthorised work, and the missing completion certificate will complicate any future sale or remortgage.
Many builders, including us, will arrange the engineer's calculations, submit the building notice and book the inspections as part of the job. Always confirm this is included in your quote and make sure the completion certificate is issued in your name at the end.
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