Do you need a warranty for an HMO?
Whether an HMO needs a warranty depends on who funds it, who buys it and who refinances it - not on the law. Here is how it usually works, project by project.
- Instant response
- Insurer quotes usually within one working day of your proposal
- UK FCA Regulated Broker
- Structural and non-structural cover
- We fill in the proposal form with you
The short answer
There is usually no law that says an HMO must have a structural warranty. You will usually need one when a lender, a buyer's lender or an investor asks for it - which is common after a conversion or significant structural work, and less common for a light refurbishment you are paying for yourself and keeping.
The law versus lenders
Not a legal requirement - but often a lending one
Planning, building regulations and HMO licensing are legal requirements. A structural warranty is not one of them - it is insurance. What makes it necessary in practice is money: most residential mortgage lenders expect a property built or converted in recent years to have a new home warranty from a provider they accept, or in some cases a professional consultant's certificate. Development lenders and investors often make one a condition of their funding.
So the real questions are who is lending, who might buy the HMO later and what your investors want. Ask them early - it is far easier to arrange cover before work starts than after.
Scenarios
Do I need a warranty? Project by project
A general guide to how often a warranty is needed, by project and by how the HMO is funded or sold. It reflects what lenders commonly ask for - your lender's own rules always come first.
| Project | Cash, and keeping it | HMO mortgage or refinance after the work | Development or bridging finance | Selling within about 10 years |
|---|---|---|---|---|
| House to HMO conversion with structural work | Your choice | Often asked for | Often a condition | Usually needed - a PCC may do |
| Refurbishing an HMO with structural work | Your choice | Sometimes asked for | Often a condition | Often needed - a PCC may do |
| Refurbishment with no structural work | Usually not needed | Rarely asked for | Depends on the facility | Rarely needed |
| New build HMO | Your choice | Usually needed | Usually a condition | Usually needed |
Your choice means nobody is likely to insist, but you may still want cover to protect your investment - see below.
When a certificate may do
When a professional consultant's certificate may be enough
Some lenders accept a professional consultant's certificate - signed by an architect, surveyor or engineer who monitored the work - instead of a warranty. They usually attach conditions: the consultant must have been involved from the start, the development must be small, and a certificate written after the event is often refused.
If you are planning to rely on one, check with your lender before work starts and make sure the consultant is appointed to monitor the work from day one. See finished HMOs and refinancing for how warranties and certificates compare.
Worth it?
Is a warranty worth it if you are keeping the HMO?
That is your decision - we give information, not advice. The things landlords usually weigh up are these:
- Refinancing later - a lender in two or three years may ask, and cover is much easier to arrange before the work than after.
- Selling later - a buyer's lender may want a warranty if the conversion is still recent.
- Protecting the work - if the builder ceases trading, their own guarantee goes with them; a warranty is backed by an insurer.
- Cost - as a rough guide around 1.25% of the rebuild cost for a structural warranty registered before work starts (plus a modest broker fee, only charged if we arrange your cover). See HMO warranty costs.
Whichever way you go, a warranty does not replace building control sign-off, your HMO licence or landlord insurance.
Do I need one? Questions
Do I need a structural warranty to convert a house into an HMO?
Not by law. You will usually need one if a lender, a buyer's lender or an investor asks for it, which is common after a conversion with structural work.
Is a structural warranty a legal requirement for an HMO?
No. Planning, building regulations and HMO licensing are legal requirements; a structural warranty is insurance that lenders and investors often ask for.
Is a warranty worth it if I am keeping the HMO and not selling?
It depends on how you will fund it later and how much you want the work protected. A future refinance or sale is the most common reason landlords who planned to keep an HMO end up needing one.
Last reviewed 30 October 2026 by the HMO Warranties team. General information only - not advice. Your cover is set by the policy wording.
Not sure if you need one? Ask us
Tell us about the HMO, how it is funded and what you plan to do with it. We will tell you what is usually needed and the providers likely to cover it.
- Takes under a minute
- Instant reply by email with your reference
- Insurer quotes usually within one working day of your completed proposal
- HMOs anywhere in England, Scotland, Wales and Northern Ireland
- Free and no obligation
Already filled in a proposal form? Email it to us or send it on WhatsApp with any drawings you have and we will take it from there.
