Covering Horsham
We work in Horsham (RH12) and the places around it, including Crawley, Horley and Haywards Heath.
Homes in the South East
The South East has a lot of 1930s and post-war semi-detached housing, well suited to rear extensions and hip-to-gable loft conversions, alongside period properties in conservation areas that need a more careful design.
What do you get with a structural alteration?
Structural alterations change the load-bearing parts of a house, most often removing a wall between two rooms and putting in a steel beam to create an open-plan layout. The work needs a structural engineer’s design and building regulations approval.
- Building control application and inspections
- Temporary works and propping
- Steel beam installation on padstones
How much should I budget for a structural alteration?
Use these ranges to budget for structural alterations; the survey turns them into a fixed price for the agreed specification.
| Structural alterations | Guide price incl. VAT |
|---|---|
| Single load-bearing wall removal with steel | £3,000 to £7,500 |
| Chimney breast removal with support | £1,800 to £4,500 |
| Multiple walls or full open-plan remodel | £8,000 to £20,000 |
What approvals does a structural alteration need in England?
Projects in England go through two separate checks. Planning (or confirmation that the work is permitted development) comes from the district, borough or unitary council, and building regulations approval comes from the council’s building control team or a registered building control approver. Where work touches a shared wall or digs near a neighbour’s foundations, the Party Wall etc. Act 1996 applies.
Internal work like this does not usually need planning permission unless the house is listed or your permitted development rights have been removed.
What can affect a structural alteration?
- The beam size can mean a downstand in the ceiling unless it is set flush within the floor.
- Removing walls can affect the fire escape route on open-plan ground floors in three-storey houses.
From first call to completion
- Start with a conversation. A short call or the online form is enough for us to understand what you want to build.
- We visit and measure. A surveyor checks the house, the boundaries and the ground, and discusses what is realistic.
- Design and fixed price. You get drawings and a written price for the agreed specification before anything is ordered.
- Construction and completion. One site lead co-ordinates every trade through to the building control certificate.
Your questions answered
Do I need building regulations approval to remove a wall?
Yes, for any load-bearing wall. Non-structural partitions usually do not need approval.
How long does it take?
The structural work is usually done in a few days, with one to three weeks including making good.
Can you visit a house in Horsham to quote?
Yes. After a short call we arrange a site visit to measure up and agree what the design needs to do, then send a written price.
Also covering
- Structural alterations in Crawley
- Structural alterations in Horley
- Structural alterations in Haywards Heath
- Structural alterations in Burgess Hill
Learn more about structural alterations, or see every project we cover in Horsham.

