Building Control approval for a new or replacement staircase
Written by Scott Jones, The Stair Guys, independent staircase measuring and sourcing specialists·Last updated
Replacing or moving a staircase is not like changing a door handle. It is structural, safety-critical building work, so it needs Building Control approval and, at the end, a certificate confirming it meets the regulations. Simply repairing or re-covering an existing stair in the same position usually does not, but a new stair, a relocated stair or a stair as part of a loft conversion does. The process differs a little across the four nations.
How Building Control sign-off works
- Apply before you start. Submit details to Building Control (full plans) or give notice that work is beginning (building notice), or in Scotland apply for a building warrant.
- Build to the regulations. The stair is constructed to the rules for your nation: rise, going, pitch, headroom, handrails and guarding.
- Inspection. Building Control inspects the work at the appropriate stage.
- Certificate. On completion you receive a completion certificate (or in Scotland you submit a completion certificate for acceptance) confirming the work is approved.
How it works in each nation
England and Wales. You either make a full plans application (drawings assessed before work) or a building notice (work proceeds and is inspected). This can be handled by the local authority or by a private Registered Building Control Approver. In England the old "approved inspector" role was replaced from 6 April 2024 by Registered Building Control Approvers, working under the Building Safety Regulator.
Scotland. You must obtain a building warrant from the local authority before work starts, and submit a completion certificate for acceptance when it is finished. It is a stricter, warrant-first system than England.
Northern Ireland. Building Control is handled by the local district council, to which you apply before starting the work.
Work already done without approval
If a stair was put in without approval, it is not necessarily a disaster, but it does need fixing on paper. In England and Wales you can apply for regularisation, a retrospective approval, though Building Control may need to open parts up to inspect, and it costs more than doing it properly the first time. The reason it matters is simple: when you sell, your solicitor and the buyer's will ask for the Building Regulations completion or regularisation certificate. No certificate can hold up or reduce a sale. So the cheapest route is always to get it signed off as you go. The exact figures your stair must meet are in our UK staircase building regulations guide.
Frequently asked
Do you need Building Control approval for a new staircase?+
Yes. A new or relocated staircase, including one in a loft conversion, is building work and needs Building Control approval and a completion certificate. Simply repairing or re-covering an existing stair in the same position usually does not, but replacing or moving it does.
How do you get a staircase signed off by Building Control?+
In England and Wales, through a full plans or building notice application to the council or a Registered Building Control Approver. In Scotland you must get a building warrant before starting and submit a completion certificate at the end. In Northern Ireland you apply to the district council. The work is inspected and a certificate issued on completion.
What happens if a staircase was fitted without Building Control approval?+
It can usually be regularised retrospectively (in England and Wales, a regularisation application), but Building Control may need to open parts up to inspect, and it costs more than getting it approved as you go. It matters because your solicitor will ask for the certificate when you sell, and not having one can hold up or reduce a sale.
Why does my solicitor need a Building Regulations certificate for the stairs?+
Because it is the proof that the work met the regulations. When you sell, the buyer's solicitor checks that any new or altered staircase has a Building Regulations completion or regularisation certificate. Without it, the buyer may ask for indemnity insurance, a price reduction, or for the work to be regularised before completion.
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