HMO fire safety costs
Fire safety is the part of an HMO conversion investors most often under-budget — and the part a valuer and licensing officer scrutinise most. Estimate yours below, including the alarm grade that 3+ storeys triggers, then build it into a full schedule of works.
Grade D1 (mains interlinked) suits smaller 2-storey HMOs; Grade A (panel, sounders, certified) is typical for 3+ storeys. Confirm with your council and BS 5839-6.
What HMO fire safety involves
- 1Fire doors & compartmentation
FD30(S) fire doors to bedrooms, kitchen and the protected escape route, with intumescent strips, smoke seals and self-closers, plus fire-stopping between compartments.
- 2Detection to the right grade
An interlinked system under BS 5839-6 — Grade D1 (mains, battery back-up) for smaller HMOs, Grade A (panel, sounders, certified) for larger or 3+ storey properties.
- 3Emergency lighting & signage
Emergency lighting on escape routes where borrowed light is inadequate, plus fire action notices, door signage, a kitchen fire blanket and extinguishers.
- 4Fire risk assessment
A competent-person FRA of the completed HMO — a legal requirement before letting, and something a lender will expect to see.
The single biggest budgeting mistake on HMO fire safety is assuming a domestic interlinked smoke-alarm package will do. On a three-storey conversion you are usually into Grade A territory — a panel, sounders and call points, commissioned and certified — which can be several thousand pounds more than a Grade D1 system. Get this wrong and the valuation or licence can stall.
ScopeWise lets you pick the alarm grade explicitly and builds the rest of the compliance pack around your room count and storeys, so the fire-safety line in your schedule reflects what the property actually needs. These figures are guidance — always confirm the specification with your council and a competent fire-risk professional.
HMO fire-safety cost guide (indicative)
| Item | Indicative cost | Notes |
|---|---|---|
| FD30(S) fire door, fitted | £320–£650 each | Incl. seals, closer, ironmongery |
| Fire alarm — Grade D1 | £900–£1,600 | Smaller 2-storey HMOs |
| Fire alarm — Grade A | £3,500–£6,000 | 3+ storey / larger HMOs |
| Emergency lighting | £80–£180 per fitting | Escape routes |
| Fire-stopping / compartmentation | £400–£2,500 | Varies with construction |
| Fire risk assessment | £150–£500 | Competent person |
| Signage, blanket & extinguishers | £120–£400 | Per property |
Indicative — requirements follow BS 5839-6, LACORS guidance and your council's standards. Confirm locally.
Frequently asked questions
What grade of fire alarm does an HMO need?+
It depends on the size and number of storeys. Smaller, lower-risk HMOs (e.g. two-storey, up to ~6 occupants) typically need a Grade D1 interlinked system; larger or 3+ storey HMOs generally need a Grade A system with a control panel, sounders and certification. The category (LD1/LD2/LD3) sets which rooms are covered. BS 5839-6 and your council's standards govern.
How much does HMO fire safety cost?+
For a typical mid-size HMO, budget roughly £3,000–£8,000+ across doors, alarm, emergency lighting, fire-stopping, FRA and signage — with the alarm grade (D1 vs A) being the biggest single swing factor. The estimator above tailors this to your room count and storeys.
Do all internal doors need to be fire doors?+
Not all — but bedroom doors, the kitchen door and any door onto the protected escape route generally need to be FD30(S). Your fire risk assessment and council standards confirm exactly which doors and to what standard.
Is emergency lighting always required?+
Not always. It's generally required where escape routes lack adequate natural or borrowed light — most common in three-storey-plus HMOs and properties with internal corridors. The FRA determines the need.
Related tools & guides
Cost figures shown are indicative estimates, not quotations. You are responsible for verifying all costs (obtain contractor quotes) and any figures submitted to a lender. ScopeWise is a documentation tool, not financial, tax, structural or planning advice. HMO compliance prompts are guidance only — confirm requirements with your local council, as standards and licensing vary by authority.