How much does it cost to knock down an internal wall?
Removing a standard non-load-bearing stud wall costs 400 to 800 pounds, including removal, making good the ceiling and floor, and waste disposal. The job usually takes a day. If the wall is load-bearing, the cost increases substantially — budget an additional 1,500 to 3,500 pounds for a steel beam, installation, propping, and building control sign-off.
Always confirm whether the wall is load-bearing before any work starts. A structural engineer's inspection costs around 300 to 500 pounds and is money well spent.
Non-load-bearing walls
If the wall is blockwork rather than timber stud, add another 200 to 300 pounds because the demolition is heavier and produces more waste. Building regulations approval is not usually required for removing a non-load-bearing partition, but check with your builder.
Load-bearing walls
A structural engineer will design a steel beam (RSJ) or concrete lintel to carry the load above. Building regulations approval is required for any structural alteration, and your builder should submit a building notice or use an approved inspector. Do not skip this — it will cause problems when you come to sell the property and cannot produce a completion certificate.
Hidden costs
Walls often contain electrical cables, radiator pipes, or gas supplies that need rerouting before demolition. Budget an extra 200 to 600 pounds for first-fix electrical and plumbing alterations. Plastering to make good the adjoining walls and ceiling typically costs 300 to 500 pounds depending on the area. Flooring is another consideration — if the rooms either side had different floor coverings, you will need to match or replace the flooring across the new open-plan space.
What this means for a quote
A wall-removal quote should itemise every element: structural engineer fees, the beam and its installation, building control, making good, service rerouting, and waste removal. If you use TailoredQuote, you can generate a scope that covers all these elements so the customer sees the full cost before work starts.
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