Decent Homes Standard for the private rented sector: how tenants can use the new £40,000 fine and £7,000 instant Category 1 hazard penalty as leverage from 1 May 2026

The Renters' Rights Act 2025 brings the Decent Homes Standard into the private rented sector for the first time. Most of the substantive standard — the new rules that say a private rented home must be in a reasonable state of repair, free from damp and mould, and have working heating, ventilation, and core facilities — is being phased in to 2035. But two enforcement tools land tomorrow, on 1 May 2026, and they materially change the leverage a tenant has when a landlord is dragging their feet on a repair.

From tomorrow:

• The maximum civil penalty for failing to address a serious hazard following a council request rises from £30,000 to £40,000.
• A brand-new instant penalty of up to £7,000 can be issued by a council on the spot if a landlord hasn't taken practical steps to fix a Category 1 hazard.
• Local authority enforcement teams gain enhanced powers, including the ability to issue improvement notices, impose fines, and ultimately take action against landlords whose properties fall short.

This is a tenant-side guide to using those two penalties as leverage today. It does not require you to wait until 2035. It does not require the substantive standard to be in force. The penalty regime is the lever — and from tomorrow, every Category 1 hazard in a private rented home in England comes with a £7,000 immediate price tag attached if the landlord ignores it.

If your landlord is also threatening a rent increase that doesn't square with the condition of the property, RentSOS can analyse the Section 13 notice and tell you whether the proposed rent matches the home's current condition. Free to check, £14.99 only if grounds to challenge are found.

At a glance: the new penalty regime from 1 May 2026

Penalty	Trigger	Issued by	Cap
Instant Category 1 hazard penalty	Landlord hasn't taken practical steps to fix a Category 1 hazard	Local authority	£7,000
Improvement notice non-compliance	Landlord ignores improvement notice	Local authority	£40,000 (was £30,000)
Enforced repairs ("works in default")	Council does the work and bills the landlord	Local authority	Cost of works + admin
Civil penalty for housing offences	Specific Housing Act 2004 offences	Local authority	£40,000 (was £30,000)
Rent Repayment Order	Tenant-led tribunal application	First-tier Tribunal	Up to 12 months' rent back to tenant

These are existing legal mechanisms — the change is the size of the financial cap and the speed at which a council can act. The instant £7,000 penalty is genuinely new: it doesn't require an improvement notice first.

What is a Category 1 hazard?

The Housing Health and Safety Rating System (HHSRS) is the regulatory framework councils use to assess hazards in residential property. Hazards are scored, and the most serious ones are designated Category 1 — meaning they pose a serious risk of harm to occupants.

The 29 hazard categories include:

Hazard	Common form in rentals
Damp and mould	Black mould on bedroom walls, ceilings, around windows
Excess cold	No heating, broken boiler, inadequate insulation, single glazing
Excess heat	Failure to ventilate, overheating in summer
Carbon monoxide	Faulty gas appliances, missing CO alarm in any room with a flame
Fire	Missing/faulty smoke alarms, locked fire exits, dangerous wiring
Electrical hazards	Loose sockets, no EICR, overloaded circuits
Structural collapse	Subsidence, sagging ceilings, falling masonry
Falling on stairs	Loose handrails, missing balustrades, uneven steps
Falling between levels	No window restrictors, missing balcony rails
Falls on level surfaces	Damaged flooring, holes, uneven thresholds
Lighting	Insufficient natural and artificial lighting
Noise	Inadequate sound insulation between dwellings
Crowding and space	Inadequate space for occupants
Personal hygiene, sanitation, drainage	Broken toilet, no hot water, blocked drains
Water supply	No mains water, contaminated water

Whether a hazard is Category 1 (most serious) or Category 2 depends on the assessed likelihood of harm and the severity of harm. Damp and mould affecting a child's bedroom is typically Category 1. A single loose floor tile in a hallway is typically Category 2.

The full list and scoring methodology is set out in the Housing Health and Safety Rating System: enforcement guidance (HHSRS Operating Guidance, 2006, updated 2025).

The new £7,000 instant penalty — how it works

From 1 May 2026, a council inspector visiting your home and identifying a Category 1 hazard can issue a fixed civil penalty of up to £7,000 on the spot if the landlord cannot demonstrate that they have taken practical steps to fix the hazard.

Three things matter about this penalty:

1. No improvement notice required first. Previously, the council would issue an improvement notice giving the landlord a fixed period to fix the hazard, and the penalty only kicked in if they ignored the notice. Now, the penalty can be issued without that step if the inspector determines no practical steps have been taken.
2. It's a civil penalty, not a criminal prosecution. The civil standard of proof (balance of probabilities) applies, not the criminal one (beyond reasonable doubt). It is much easier for a council to impose.
3. The landlord can appeal, but the appeal must be made within 28 days, and the council retains the income.

The practical effect: a landlord facing a Category 1 hazard now has a fast, expensive penalty hanging over them. £7,000 is more than two months' rent on most properties. From a leverage standpoint, mentioning the penalty in writing changes the conversation.

A 5-step playbook: from "my landlord won't fix the damp" to leverage

Step 1 — document the hazard (today)

Before you ask the landlord for anything, lock down evidence. This is what you'll need both for the council if it escalates, and for your own records:

• Photo evidence with timestamp metadata (most phone cameras embed this in the file).
• Video walk-through showing the extent of the hazard.
• Written record of when you first noticed it.
• Health impact if any: GP letter mentioning respiratory symptoms in a damp/mould case is gold-standard evidence.
• Children or vulnerable occupants in the home: note ages and any health conditions.

Damp and mould, missing/faulty heating, faulty electrics, and missing safety alarms are the four most common Category 1 hazards in private rentals — and all four are visible to a phone camera.

Step 2 — written request to the landlord (Day 0)

Send an email (not a phone call) clearly identifying the hazard, attaching the photos, and asking for a fix within 14 days. Email creates a paper trail; phone calls don't.

Subject: Hazard report — [property address] — written request for repair

Hi [Landlord / Agent],

I'm writing to formally raise a hazard at [property address] that
needs repair.

The hazard: [description, e.g. extensive black mould in the master
bedroom, around the window and on the north-facing wall, affecting
my child's sleeping space]. Photographs are attached, taken on
[date].

Under the Housing Act 2004 and the Decent Homes Standard, this
appears to be a Category 1 hazard (excess cold / damp and mould /
[etc]). I'm asking you to inspect and arrange repairs within
14 days of this email.

If the hazard is not remedied within 14 days, I will report the
matter to [council name] Environmental Health team, who under the
new Renters' Rights Act regime from 1 May 2026 can issue a civil
penalty of up to £7,000 for unaddressed Category 1 hazards.

Please confirm receipt and the proposed repair date by reply.

Thanks,
[Your name]
[Property address]
[Date]

This email does several things at once. It dates the hazard report, names the legal framework, gives the landlord a reasonable window, and signals consequences. The £7,000 reference is the lever — it's the only sentence in the email that changes the financial maths for the landlord.

Step 3 — second chase + 7-day final warning (Day 14)

If the landlord has done nothing in 14 days, send a final written warning:

Subject: Final warning — hazard at [property address] — council
referral in 7 days

Hi [Landlord / Agent],

It has been 14 days since my email of [date] reporting a Category 1
hazard at [property address]. No inspection has been arranged,
no repair has been done, and I have not received a confirmation
that one is scheduled.

If repair work is not arranged within the next 7 days, I will refer
the matter to [council name] Environmental Health team for
inspection. From 1 May 2026, the council can issue a civil penalty
of up to £7,000 for unaddressed Category 1 hazards, and up to
£40,000 for ignoring an improvement notice.

[If a Section 21 has been served:] I note also that under
Section 33 Deregulation Act 2015, retaliatory eviction protections
apply where a landlord has been notified of a Category 1 hazard;
any Section 21 notice served after [date of original email]
may be unenforceable on retaliatory eviction grounds.

Please confirm by reply that repairs will be arranged within
7 days.

Thanks,
[Your name]
[Property address]
[Date]

Two new elements: the council referral threat with the £7,000 reference, and the retaliatory eviction angle if a Section 21 has been served. From tomorrow, Section 21 is gone — but if you're on this playbook today and a Section 21 was served before midnight, the retaliatory protection still applies.

Step 4 — council referral (Day 21)

Most councils have an online "report a hazard" form on the Environmental Health page. Submit it with all your photo evidence and the email trail showing the landlord was given two written warnings.

What happens:

1. Council assesses the case (timeframe varies — usually 5-10 working days for an initial inspection appointment).
2. Council inspector attends your property (you must be home, or arrange access).
3. Inspector scores the hazard under HHSRS.
4. If Category 1: from 1 May 2026, council can issue an instant £7,000 penalty if no practical steps have been taken by the landlord. They can also issue an improvement notice giving the landlord a deadline to fix it.
5. If the improvement notice is ignored, the penalty escalates to up to £40,000 and the council can do the works themselves and charge the landlord.

Three quick tips for the council referral:

• Be specific. "Damp and mould affecting bedroom of 4-year-old child" beats "the flat is damp."
• Include dates. "First reported to landlord on [date]; second written warning on [date]; no response."
• Mention any previous attempts. If the landlord has been to the property and dismissed the issue ("just open a window"), say so.

Step 5 — Rent Repayment Order (parallel route)

A Rent Repayment Order (RRO) is a tenant-led First-tier Tribunal application that can recover up to 12 months of rent from a landlord who has committed a specified housing offence. From 1 May 2026, the RRO regime under the Renters' Rights Act expands to cover more offences and increases the maximum recovery period.

For a Category 1 hazard case:

• If the council issues an improvement notice and the landlord fails to comply, that's a relevant housing offence.
• You (the tenant) can apply for an RRO regardless of whether the council has prosecuted.
• Filing fee: £300 (Help with Fees available if you're on a low income or qualifying benefit).

This runs in parallel with the council route. It's the most direct way for a tenant to recover money from a non-compliant landlord — the council penalty goes to the council, but the RRO goes to you.

Three response templates for landlord pushback

Template A — landlord blames you for the hazard

Subject: Re: damp claim — your response of [date]

Hi [Landlord],

I note your suggestion that I should "open the window more." For
clarity:

- The bedroom window has restrictor locks fitted and cannot open
  fully. (Photo attached.)
- I am running the dehumidifier I purchased at my own expense.
  (Receipt attached.)
- The mould is on the cold north-facing external wall, consistent
  with cold-bridging or insufficient insulation rather than tenant
  ventilation behaviour.

Under HHSRS guidance, persistent mould on cold external walls is
a structural / insulation issue, not a tenant behaviour issue.
I'd ask you to arrange an inspection and address the underlying
cause.

If you continue to take the position that tenant behaviour is the
sole cause, I will ask the council inspector to assess this when
they attend.

Thanks,
[Your name]

Template B — landlord offers cosmetic fix only

Subject: Re: paint job — not sufficient under HHSRS

Hi [Landlord],

I've received your offer to repaint the affected wall with anti-mould
paint. Unfortunately, repainting alone does not address a Category 1
damp and mould hazard under HHSRS — the paint will fail again within
months without addressing the underlying cause (cold-bridging,
ventilation, or insulation).

Could you arrange:

1. An inspection by a qualified surveyor to identify the cause.
2. Remedial work addressing the cause (insulation, ventilation,
   damp-proofing if relevant).
3. A schedule confirming the timetable.

I'd prefer to resolve this with you directly rather than through
the council. But the council route remains open, and the £7,000
instant penalty regime from 1 May 2026 changes the maths.

Thanks,
[Your name]

Template C — landlord threatens eviction in response

Subject: Re: notice received — retaliatory eviction concerns

Hi [Landlord],

I've received the [Section 21 / Section 8] notice you served on
[date]. I note that this was served [N] days after I formally
reported a Category 1 hazard to you on [date].

Under Section 33 of the Deregulation Act 2015, a Section 21 notice
served in response to a tenant's complaint about a Category 1
hazard can be unenforceable on retaliatory eviction grounds —
particularly where (a) the tenant complained in writing, (b) the
landlord did not address the hazard adequately, and (c) the
council served (or was likely to serve) an improvement notice.

[If pre-1 May:] I'm raising this as my position. I will be
seeking advice from Citizens Advice, Shelter, and the Housing
Loss Prevention Advice Service.

[If post-1 May:] Section 21 has been abolished. Any "Section 21"
served on or after 1 May 2026 is procedurally invalid.

Thanks,
[Your name]

Three worked scenarios

Scenario 1 — Damp and mould, working family, 14-month tenancy. Sarah lives in a Manchester terrace with her partner and two-year-old. North-facing bedroom has black mould around the window, on the wall, and on the ceiling. She emails the landlord on 1 May. Landlord ignores the email. She emails again on 15 May with the council penalty reference. Landlord offers to repaint (Template B response). She declines and refers to the council. Council inspects on 28 May, scores the hazard Category 1, issues an instant £7,000 penalty, and requires remedial works within 28 days.

Scenario 2 — No working heating in winter, professional couple, 10-month tenancy. Tom and Aiden's flat boiler has been broken for three weeks; landlord keeps "ordering parts." Outside temperature is 4°C. They email landlord with photo of the boiler error code and a CO alarm reading. Landlord misses the 14-day deadline. They submit to council Environmental Health. Council issues an emergency improvement notice (excess cold + working appliances both flagged). Landlord arranges replacement boiler within 5 days.

Scenario 3 — Faulty smoke alarm, single tenant, 8-month tenancy. Aisha's smoke alarm has been chirping low-battery for three months; landlord has ignored two emails. She replaces the battery herself but discovers the alarm is hard-wired and not functioning. She emails landlord with video evidence of the failed alarm test, references HHSRS fire hazard, gives 14 days. Landlord engages on day 12 and arranges electrician.

Edge cases

"My landlord says the property is fine — the hazard is in my head." Council inspectors apply HHSRS scoring objectively. Their view, not the landlord's, is what counts.

"The hazard is in a part of the building the landlord doesn't own (e.g., communal stairs)." The freeholder or managing agent is responsible. Your council Environmental Health team can still investigate; they will identify the responsible party.

"I'm on a temporary tenancy / Airbnb-style arrangement." The Decent Homes Standard penalty regime applies to private rented homes — not licenced HMOs (different regime), not Airbnb (different regime), not properties under specific exclusions. If you're unsure, the Citizens Advice housing team can clarify your tenancy type.

"My landlord lives abroad and never responds." Your tenancy agreement should name a UK service-of-process address. If they refuse to engage, that's actually fine for the council route — councils can serve notices on the registered address and act regardless of landlord engagement.

"I'm worried about losing the tenancy if I escalate." Pre-1 May 2026: retaliatory eviction protection under Section 33 Deregulation Act 2015 applies. Post-1 May: Section 21 is abolished, so the landlord cannot evict without a specific Section 8 ground with evidence. Reporting a Category 1 hazard is not a Section 8 ground.

Faqs

(See FAQs below.)

Where RentSOS fits

RentSOS analyses Section 13 rent increase notices for procedural defects. The Decent Homes Standard penalty regime is a separate route — for that, the council Environmental Health team is your first stop and the First-tier Tribunal is your second.

But the two often go together. A landlord who has been ignoring damp for six months and then serves a 12% rent increase notice is making themselves vulnerable on two fronts. RentSOS can flag whether the rent increase is procedurally invalid; the council route can flag whether the hazard is enforceable. Together, they tend to resolve cases faster than either alone.

If you're holding a Section 13 alongside a hazard issue, run the free RentSOS check first — it takes two minutes and tells you whether the rent increase is even valid before you engage the council route on the condition issue.