A professional fire risk assessment in 2026 typically costs £200–£450 for a small HMO or a straightforward set of common parts, rising to £500–£900 or more for a larger HMO, a converted block, or anywhere with genuinely complex escape routes — and past £1,000 for large, high-risk or specialist buildings. That's the fee for a competent assessor to inspect the premises, walk every escape route, and produce a written report with a prioritised action plan.
But the number that matters more than the price is whether you're legally required to have one at all. For a large share of the private rental sector — ordinary single-let houses and flats, let on an assured shorthold tenancy with no shared common parts — the honest answer is you aren't, under the law that actually governs this. Where the duty does apply — HMOs, blocks of flats, anything that isn't a single private dwelling — it isn't optional. It's backed by a criminal offence with unlimited fines, and since October 2023 there's a specific legal duty to keep the assessment itself in writing, not just act on what it says.
I'm a building surveyor and energy assessor, not a registered fire risk assessor: I don't compile fire risk assessments or sign them off myself, a competent fire safety professional does that. What follows is 2026 pricing cross-checked against several UK fire-safety compliance firms' published figures, who the Regulatory Reform (Fire Safety) Order 2005 actually applies to, what changed after Grenfell, and what I'd want to see in a fair quote.
The short answer
Figures below were checked on 6 September 2026 against several independent UK fire-safety compliance firms' published 2026 price guides, cross-referenced against each other; the larger aggregator cost-guide sites return the same broad bands. As with the rest of this series, London and the South East — Dom’s patch included — commonly run 20–40% above the national figures quoted here.
| Property / building | Typical cost (2026) | What's included |
|---|---|---|
| Single-let house or flat (no shared parts) | Not required under the FSO | No statutory duty; a voluntary review runs roughly £100–£200 if you want one done anyway |
| Small HMO (up to ~6 tenants, 2–3 storeys) | £200–£450 | Site visit, common parts & escape routes inspected, written report with an action plan |
| Larger HMO or converted block (4+ storeys / high sleeping risk) | £500–£900+ | Full common-parts assessment, complex escape route and compartmentation analysis |
| Block of flats, mixed-use or commercial premises | £300–£900+ (scales with size & hazard) | Common parts, external walls/cladding since the Fire Safety Act 2021; Type 1–4 scope for commercial |
The row that surprises people most is the first one. A landlord letting an ordinary house or flat to a single household, with no shared hallway, stairwell or other common part, sits outside the Fire Safety Order altogether — no assessment, written or otherwise, is a legal requirement. The moment there's a shared landing, a shared front door, or more than one household with independent access to a corridor they don't own — an HMO, a converted block, flats above a shop — the duty applies in full, and applies specifically to the common parts, not automatically to the inside of each individual let.
What drives the price
Sleeping risk. A premises where people sleep — any HMO, any flat, a hotel or care home — needs a materially more careful assessment than an office or shop, because escaping a fire while asleep is a different and harder problem than escaping one while awake and dressed. This is the single biggest driver of both price and professional judgement in this list.
Storeys and escape route complexity. A simple two-storey house with one obvious route out costs far less to assess properly than a five- or six-storey converted block with multiple staircases, protected corridors and compartmentation to check.
Specialist features. Commercial kitchens, cladding or render systems, communal laundries, battery storage and shared boiler rooms all add time and specialist knowledge the assessor has to bring, which shows up in the fee.
Assessor qualification and report depth. A template desktop review and a report built to a recognised methodology, with numbered findings, photographs and a costed action plan, are not the same product, even when they're both called a “fire risk assessment” and priced within a few pounds of each other.
Region. London and the South East trend 20–40% above the national figures quoted here, in line with most trades in this series.
Do you actually need one?
The operative law is the Regulatory Reform (Fire Safety) Order 2005. It applies to virtually every non-domestic premises and to the common parts of every building containing two or more domestic premises — it does not apply to a single private dwelling. That single distinction decides most of what follows.
If you let an ordinary house or flat as one self-contained unit, with no common parts shared with another household, the Order simply doesn't reach you. You still have duties around smoke alarms, and carbon monoxide alarms where there's a solid fuel or other relevant appliance, but a formal fire risk assessment isn't one of the boxes you need to tick. Plenty of firms will happily sell a “single-let fire risk assessment” anyway — there's nothing wrong with commissioning one voluntarily as good practice, but don't let a quote imply it's a legal requirement when it isn't.
An HMO is a different position entirely. The Order applies regardless of licensing status, but the licensing framework doubles down on it: a compliant fire risk assessment by a competent person is a mandatory condition of an HMO licence, and a council can ask to see it at any point, refuse to renew the licence, or serve a prohibition notice if it's missing or inadequate.
If you own a flat within a block, the common parts — stairwells, corridors, the entrance lobby — are usually the freeholder's or managing agent's responsibility as the building's “responsible person,” not yours individually. It's worth confirming who holds that document, and when it was last reviewed, before paying someone to duplicate it for a building you don't control.
Can you do it yourself? For a genuinely simple premises — a small office or shop, no sleeping risk, a straightforward layout — the government's own sector-specific guides are written to support exactly that. The moment sleeping accommodation is involved, that DIY route gets much harder to defend, because escape-while-asleep is precisely the scenario the guidance flags as needing a more careful, arguably professional, judgement call. In practice, nobody I'd trust to hand an HMO fire risk assessment is doing it as a spare-time project.
What changed after Grenfell — and the record-keeping trap
The Fire Safety Act 2021 clarified that the Order's scope explicitly includes a building's structure and external walls — cladding, balconies, windows — and the entrance doors to individual flats that open onto common parts. That's a genuine widening of what has to be assessed, not a technicality, and it's the reason a common-parts fire risk assessment on an older block now routinely includes a look at the external wall system that a pre-Grenfell assessment wouldn't have touched.
The Fire Safety (England) Regulations 2022 followed in two stages. From 23 January 2023, responsible persons for multi-occupied residential buildings had to start sharing fire safety information with residents, including personal emergency evacuation information for vulnerable residents in high-rises, and installing wayfinding signage in buildings of 11 metres or more. From 1 October 2023, a further duty landed that catches out more landlords than any other change in this area: the responsible person must record the fire risk assessment in full, and record the identity of whoever carried it out or reviewed it. That's a materially broader duty than the old rule, which only forced written records where an employer had five or more staff, a licence was in force, or an alterations notice required it. A landlord who's had “a chat with someone about fire safety” but has nothing written down is no longer in a defensible position, even for buildings that would previously have sat below that older threshold.
What I'd watch for in a quote
- Competent-person credentials, not a self-description. Look for membership of a recognised register — the National Fire Risk Assessors Register or the Institution of Fire Engineers — or a report that visibly follows a recognised competency framework, rather than someone who "does a bit of everything."
- A structured methodology with numbered findings and a prioritised, costed action plan, not a narrative letter that concludes "generally fine."
- Photographs of what was actually inspected — common parts, escape routes, fire doors, service risers — not a template with your address dropped in.
- Sleeping risk assessed as its own category, not folded into a generic layout review — this is exactly the detail a cheap desktop assessment skips.
- A stated review trigger — change of occupancy, layout, or fire safety works — not just a date stamped a year in the future.
- No guaranteed pass before the site visit. An assessor who tells you the building will be fine before they've walked it is telling you what you want to hear, not what's actually there.
Questions I get asked
Do I need a fire risk assessment for an ordinary single buy-to-let house? No, not under the Fire Safety Order, provided it's genuinely a single letting with no shared common parts — hallway, stairwell or communal entrance — used by another household. You still have separate duties around smoke alarms and, where relevant, carbon monoxide alarms, but a formal fire risk assessment isn't one of them. The moment the property is an HMO, or shares a common part with another unit, that changes completely.
How often does a fire risk assessment need to be renewed? There's no fixed statutory interval — the law requires it to be reviewed whenever there's reason to think it's no longer accurate. In practice most assessors and enforcing authorities treat that as at least annually for HMOs and other sleeping accommodation, and up to every two years for simple, low-risk commercial premises with no significant changes. Any change to the building, its occupancy, or a near-miss triggers an earlier review regardless of the date on the last one.
What happens if I can't produce one when the council asks? For an HMO, a missing or inadequate fire risk assessment is a breach of a mandatory licence condition, and a council environmental health officer can serve an improvement or prohibition notice, refuse to renew the licence, or refer the case for prosecution — offences under the Fire Safety Order carry an unlimited fine and, in the most serious cases, up to two years' imprisonment. Insurers have also refused fire-damage claims where a required assessment simply didn't exist.
Can I do my own fire risk assessment to save the fee? For a genuinely simple, low-occupancy commercial unit with no sleeping accommodation, the government's own sector-specific guides are designed for exactly that, and plenty of small business owners use them. The moment there's anyone sleeping on the premises — any HMO, any flat — I'd want a competent third party doing it, both because the judgement calls get harder and because doing it yourself is a weak position to be defending if a council or an insurer ever asks who the competent person was.
If you're taking on a rental property — buying a house to let out, or inheriting a shared house that might already be an HMO without you realising it — my Buy to Let Survey reviews the property against all 29 HHSRS hazard profiles, fire among them, alongside the physical condition of the building. It's a genuinely useful early warning if a property's layout or occupancy looks like it's drifting into HMO territory, but it isn't a substitute for the FSO-compliant fire risk assessment an HMO or a block's common parts actually need — that has to come from a competent fire risk assessor. It sits alongside the wider landlord compliance picture I cover in EICR cost and gas safety certificate cost. Call 07946 618203 or get in touch for a straight read on a property before you commit.
Small print. This guide is general information, not advice on a specific property, and it doesn’t replace a proper fire risk assessment by a competent person and a written quote for your own building. Prices were researched and correct to the best of my knowledge on 6 September 2026; costs move and vary by region and property. Always get at least three written quotes, and check the assessor's competence and registration before you instruct them — for anywhere with sleeping accommodation, it isn't optional.