Removing a load-bearing wall

Most prime London homes were built as a series of rooms.

Most owners now want fewer, larger rooms. That usually means taking out a wall.

In a period house, that wall is often holding something up.

Here is what has to happen before it comes out.

Start with what the wall carries

A structural engineer must assess what the wall supports.

That can be floors, other walls, a chimney breast or the roof.

The engineer then decides how those loads reach the ground without it.

The answer is often a new beam with new bearings at each end.

Chimney breasts follow the same rule. Their removal needs the same assessment.

Open up before you design

Period houses hide a great deal. Earlier owners made alterations nobody recorded.

Hidden construction can change the assumptions behind the design.

So targeted opening up is often needed before the design is final.

That means exposing bearings, joists or foundations in a few planned places.

Agree what is opened, who records it and how it is made safe.

Check for asbestos before strip-out

Older houses can contain asbestos in places nobody expects.

Plaster, floor finishes, boxing and old services can all hide it.

Where the work could disturb it, a suitable survey must come first.

A quick walk round is no substitute for an intrusive survey.

Ask a competent surveyor to set the scope around the planned works.

Only then should the strip-out begin.

Temporary works hold the house in the meantime

A building needs support while it is being altered.

This is true even when the final structure is simple.

Props carry the load while the wall comes out and the beam goes in.

That temporary condition must be designed and managed as carefully as the permanent work.

Ask who designs it, who checks it and who coordinates it on site.

Approvals that apply

Internal alterations can need building regulations approval.

Structural changes can fall within building regulations even without planning permission.

Check the scope with the building control provider before work begins.

In a listed house, the wall itself may also need consent.

Inspections do not replace the duties of the design team. Our guide to building control explains who signs what.

The neighbours may have a say

Neighbour matters must be checked before any structural removal.

A beam bearing into a shared wall can bring in the Party Wall Act.

Notices and awards take time, so start early. Party wall agreements explained covers costs and timing.

Open plan changes the fire strategy

Removing the walls around a stair can affect how people escape in a fire.

So can moving where people sleep.

The answer belongs in the design, agreed with the building control route.

Testing the plan early is better than adding safety measures at the end.

Keep the evidence

Structural work leaves a paper trail, and you will need it.

Agree an inspection and evidence schedule at the start.

Name who obtains each certificate and who keeps it.

Engineer calculations, inspection records and completion certificates belong in the handover file.

A future buyer and their surveyor will ask for them.

One sequence, one team

The engineer, the builder and the building control provider must work to one plan.

Each has a defined responsibility. Record who holds which.

At NU, structural work sits inside the same programme as the finishes.

That keeps the sequence safe, and the open room arrives as designed.

Thinking of opening up a period house?Fill out the contact form or call 020 7731 6841 and let’s get you booked in for a free call with Nick.