Home/Landlord Services/Guides/Smoke & CO Alarm Compliance — UK Landlord Cost Guide

Comply with alarm regs.

Smoke alarms on every storey, CO alarms in rooms with combustion appliances — fitted to 2022 regs.

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Gas Safety Certificate (CP12) annual.

Every let with gas needs an annual Gas Safety Cert. £80–£140. Without it, you face £6k fines and possible prosecution.

EICR every 5 years (England).

Electrical Installation Condition Report — legally required since 2020 for English rentals. £150–£300 per property.

EPC E+ for lettings.

MEES rules require EPC E or above to legally let. Below E, you can't let. Plan upgrades before listing.

Right to Rent checks.

England-only: check tenant immigration status before move-in. Penalties up to £20k per illegal tenant if you skip this.

Costs & timeline

Know what it costs. Know when it ends.

Indicative UK ranges and what affects price.

Cost range

By job type

Inc. VAT · 2026
Source: NMT quotes
Gas Safety Cert (CP12)
£80–£150
EICR (5-yearly)
£150–£300
EPC (10-yearly)
£60–£120
Inventory (3-bed)
£100–£250
End-of-tenancy clean
£250–£600
Full management (% rent)% of monthly rent
£10–£15
!

Quote spread is typically ± 18% — always get 3 quotes.

At a glance

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Smoke & CO Alarm Compliance — UK Landlord Cost Guide infographic
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Landlord Services explained

Smoke and CO alarm compliance — mandatory for all rentals since 2022. Mains-wired or sealed 10-year battery. Expect to pay £50–£300 for UK landlord alarm install.

What Does the Work Involve?

NICEIC electrician installs interlinked alarms. Smoke alarm every storey. CO alarm every room with fixed combustion appliance. Mains-wired Grade D1 or interlinked sealed 10-year. Test annually.

Typical Costs

ItemLow (£)High (£)Notes
Sealed 10-year battery smoke alarm1550Per alarm
Mains-wired interlinked smoke alarm40120Plus install
CO alarm (single)1560Per alarm
Annual smoke + CO test30100Per visit
3-bed house full install1504003 smoke + 1 CO
Mains-wired upgrade200600Per house
HMO comprehensive system5003,000BS 5839 Grade D1

UK Regulations

Smoke and Carbon Monoxide Alarm (England) Regs 2015 amended 2022. Every storey smoke. Every room with combustion CO. BS 5839-6 standard. Annual test by tenant, landlord ensures working at tenancy start.

Frequently Asked Questions

Mains-wired or battery?

Either complies. Mains: more reliable, £400-£600 install. 10-year sealed: cheaper.

Interlinked essential?

Recommended for multi-storey. Required for HMO and Scottish rentals.

Scotland different?

All homes (not just rentals) must have interlinked since Feb 2022.

Penalties for non-compliance?

Up to £5,000 fine + criminal liability. Insurance void.

Annual test required?

Tenant tests. Landlord ensures working at start. Tenancy agreement clause.

Best UK brands?

Aico, Kidde, FireAngel. BS 5839 Grade D1 certified.

This guide was written with AI assistance and is intended for general information only. Prices are estimates based on UK averages and may vary by region. Always get at least three quotes and consult a qualified professional before starting any work.

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