Quantity surveyors in London. Budgets and cost plans, priced line by line by our in-house quantity surveyor.
We do not publish prices for panic rooms.
No two briefs are the same. A price without a brief would mislead you.
What we can tell you is what moves the cost.
What sets the price
The threat comes first. Who it is built against sets everything else.
The room comes next. Converting a dressing room costs less than building a new room.
The security door is often the largest single item. Its rating follows the brief.
Walls and ceiling depend on the existing structure. The engineer decides the reinforcement.
Air and power add cost: fresh air in, its own power and alarms.
An outside line that does not rely on the house is part of it.
How hidden it must be
A room you would never notice takes more joinery.
The finished room should give no hint of what it is.
That care shows in the price, and in the result.
When it is built
Built during a wider renovation, it costs less than added afterwards.
The walls are already open, and the trades are already on site.
Design takes 4 to 6 weeks. The build takes 8 to 12 weeks.
These are typical timescales. Every house is different.
How we price it
After a private brief and a site visit, we price the agreed specification.
An NDA is available on request.
The location and security details stay private.
Read more in why London homes are adding panic rooms.
Thinking about a protected room in a London home?Fill out the contact form or call 020 7731 6841. Every conversation is private.
This is the work we do. Quantity surveyors in London, or ask for a cost estimate.
Published 14 November 2026. Written by the NU Projects studio, edited since for house style and accuracy.
