Landlords often think of planning permission as something that only matters when building an extension or changing the outside of a property.
That is a mistake.
Planning permission can also matter when the use of a property changes.
A property may still look like a house or flat from the outside, but the way it is occupied can change the planning position. This is particularly important for HMOs, short-term lets, serviced accommodation, company lets, flat conversions and properties used in ways that create more activity than an ordinary home.
The key message is simple: landlords should check the planning position before changing how a rental property is used.
Planning is not just about building work
Planning permission controls the development and use of land and buildings.
A landlord may need planning permission for physical works, but also for certain changes of use.
This can include moving from:
- a single household let to an HMO;
- a family home to short-term visitor accommodation;
- a standard residential let to serviced accommodation;
- one dwelling to several self-contained flats;
- residential use to mixed residential and commercial use;
- ordinary letting to a high-turnover guest accommodation model.
A landlord should not assume that because no walls are being moved, planning permission is irrelevant.
Use classes
Planning law groups many types of property use into use classes.
In simple terms, a standard house or flat occupied by one household is normally treated differently from a larger HMO, commercial use or visitor accommodation.
The use class matters because some changes of use may be allowed without a full planning application, while others may need permission.
However, the position can be affected by:
- the country the property is in;
- local planning policies;
- Article 4 directions;
- planning conditions;
- previous planning permissions;
- HMO rules;
- short-term letting rules;
- intensity of use;
- neighbour impact;
- whether the use has become materially different.
Landlords should check the local position rather than relying on broad assumptions.
HMOs
HMOs are one of the most common planning traps for landlords.
In England, changing a standard dwellinghouse into a small HMO may be permitted development in some areas. However, this is not always the case.
Planning permission may be needed where:
- the local authority has an Article 4 direction removing the permitted development right;
- the HMO is larger and falls outside the small HMO category;
- the property will be occupied by more people than the permitted use allows;
- the layout or occupation creates a materially different use;
- previous planning conditions restrict use;
- the property is in a sensitive area;
- local policy controls HMO concentration.
In Wales, landlords should be especially careful because planning rules around HMOs have been more restrictive. A change from a single household dwelling to an HMO with three or more unrelated occupiers may need planning permission.
Article 4 directions
Article 4 directions are a major issue for landlords in England.
An Article 4 direction allows a local planning authority to remove certain permitted development rights in a defined area.
For landlords, this often matters where councils have removed the right to change a single household dwelling into a small HMO without planning permission.
This means that two similar properties in different streets or council areas may be treated differently.
A landlord should check:
- whether the property is in an Article 4 area;
- what permitted development rights have been removed;
- when the direction came into force;
- whether it applies to HMOs, short-term lets or other uses;
- whether a planning application is needed;
- whether local HMO concentration policies apply.
Do not assume that because one landlord nearby has an HMO, permission is not required.
HMO licensing is not planning permission
HMO licensing and planning permission are separate.
This is one of the most common landlord mistakes.
A landlord may need:
- HMO planning permission;
- an HMO licence;
- building regulations approval;
- fire safety works;
- mortgage consent;
- insurance cover;
- leasehold consent.
Having one does not mean the others are covered.
A council may be able to grant an HMO licence, but that does not automatically confirm planning permission. Equally, planning permission does not remove the need for HMO licensing where licensing rules apply.
Landlords should check both.
Short-term lets
Short-term lets can also raise planning issues.
A property used occasionally for short stays may not be treated the same as a property run year-round as visitor accommodation.
Planning risk increases where there is:
- frequent guest turnover;
- bookings throughout the year;
- noise complaints;
- parties or events;
- impact on neighbours;
- loss of ordinary residential accommodation;
- parking pressure;
- commercial-style operation;
- staff, cleaners or management visits;
- advertising as holiday accommodation;
- whole-property visitor use.
The more the use looks like a business or visitor accommodation rather than ordinary residential occupation, the more carefully the planning position should be checked.
Short-term let registration and local control
Short-term letting is moving towards more formal regulation.
In England, a short-term let registration scheme is being developed and planning changes have been proposed to give local authorities more oversight.
In Wales, visitor accommodation registration is due to become a legal requirement from October 2026 for providers taking bookings for overnight stays.
Landlords should expect short-term letting to become more visible to local authorities, tax bodies and regulators.
The days of quietly switching a standard rental property to short-stay accommodation without scrutiny are disappearing.
London’s 90-night rule
London has specific rules for short-term letting.
In Greater London, residential premises cannot generally be used for short-term letting for more than 90 nights in a calendar year unless the relevant planning position allows it.
This matters for landlords using booking platforms.
A landlord should keep records of nights let and should not rely solely on the platform to manage compliance.
Where the landlord wants to operate beyond the limit, planning advice should be taken.
Serviced accommodation
Serviced accommodation is not always treated as ordinary residential letting.
A property marketed to contractors, business travellers, weekend visitors or short-stay guests may raise planning questions, especially where stays are frequent and the property is no longer used as a normal home.
Factors that may matter include:
- number of bookings;
- average length of stay;
- guest turnover;
- whether cleaning and linen services are provided;
- whether the property is advertised like a hotel or holiday let;
- impact on neighbours;
- whether staff attend regularly;
- whether there are complaints;
- whether the property is in a block of flats;
- whether the use is permanent or occasional.
Landlords should not assume “serviced accommodation” is just another tenancy label.
Company lets
Company lets can also affect use.
Some company lets are ordinary residential occupation by named employees. Others are closer to serviced accommodation, contractor accommodation or rotating occupation.
Planning questions may arise where:
- occupiers change frequently;
- the property is used for short stays;
- multiple unrelated workers occupy the property;
- the company sublets or manages occupation;
- the property becomes an HMO;
- the use becomes commercial in character;
- neighbours complain about turnover or disturbance.
A landlord should understand exactly how the company intends to use the property.
Rent-to-rent
Rent-to-rent arrangements can create planning risk.
A landlord may think the property has been let to one person or company, but the property may then be used as:
- an HMO;
- serviced accommodation;
- short-term accommodation;
- supported housing;
- temporary accommodation;
- company worker accommodation;
- room-by-room letting.
If the planning position changes, the owner may still face consequences.
Landlords should not allow another operator to change the use of the property without written permission and proper checks.
Flat conversions
Converting one property into several flats is a major planning issue.
A landlord may need planning permission, building regulations approval, lease changes, utility changes, fire safety design, sound insulation, mortgage consent and insurance changes.
Planning considerations may include:
- loss of a family house;
- parking;
- bin storage;
- amenity space;
- outlook;
- room sizes;
- local housing policy;
- impact on neighbours;
- design and layout;
- access;
- cycle storage;
- refuse collection.
Flat conversion should never be treated as ordinary refurbishment.
Subdivision and bedsits
Subdividing property into rooms, bedsits or self-contained units can also require planning permission.
The planning position may depend on whether the property remains one dwelling, becomes an HMO, becomes several flats or becomes another form of accommodation.
A landlord should be cautious before:
- adding locks to multiple rooms;
- creating kitchenettes;
- adding extra bathrooms;
- advertising rooms separately;
- creating separate entrances;
- installing separate meters;
- increasing occupancy;
- changing the layout for unrelated occupiers.
The physical work and the use need to be considered together.
Outbuildings and annexes
Landlords sometimes look at outbuildings, garages or annexes as additional rental space.
Planning issues may arise if an outbuilding is used as:
- a separate dwelling;
- a bedroom;
- holiday accommodation;
- an annexe let separately;
- office accommodation;
- staff accommodation;
- short-term guest accommodation.
Even where an outbuilding was lawfully built, using it as separate living accommodation may be a different planning matter.
Landlords should check before advertising it or including it in the rent.
Mixed use
A tenant may ask to run a business from the property.
Some home working may be acceptable and may not change the planning use. But more intensive business use can create problems.
Planning risk may increase where there are:
- customers visiting;
- deliveries;
- signage;
- staff;
- noise;
- equipment;
- stock storage;
- traffic;
- parking pressure;
- nuisance;
- commercial waste;
- use of outbuildings;
- change in the character of the property.
Landlords should not casually approve business use without checking the lease, mortgage, insurance and planning implications.
Planning conditions
A property may already be subject to planning conditions.
These can restrict how the property is used.
Conditions may relate to:
- occupancy;
- holiday use;
- student occupation;
- staff accommodation;
- agricultural occupancy;
- parking;
- short-term stays;
- hours of use;
- guest numbers;
- permitted occupiers;
- removal of permitted development rights;
- use of outbuildings.
Landlords should check historic planning permissions where the property has unusual use, recent conversion, previous enforcement history or restrictive conditions.
Lawful development certificates
Where the planning position is uncertain, a lawful development certificate may sometimes be useful.
This can provide formal confirmation from the local planning authority that an existing or proposed use is lawful.
A landlord might consider this where:
- an HMO has existed for many years;
- short-term letting has been operating for a long period;
- a use is disputed;
- a sale or remortgage requires certainty;
- enforcement risk is unclear;
- permitted development rights are being relied on;
- the landlord wants written confirmation before investing.
A certificate is not a shortcut. Evidence will be needed.
Planning enforcement
If a landlord changes use without permission, the council may investigate.
This can be triggered by:
- neighbour complaints;
- adverts;
- platform listings;
- council tax or business rates records;
- HMO licensing applications;
- waste complaints;
- noise complaints;
- parking complaints;
- inspections;
- local intelligence;
- fire service concerns.
Possible outcomes may include requests for information, planning contravention notices, enforcement notices, stop notices, refusal of retrospective permission or requirements to cease the use.
Enforcement can be expensive and disruptive.
Retrospective planning applications
A landlord may sometimes apply retrospectively for planning permission after a use has started.
But retrospective permission is not guaranteed.
The council may refuse, especially where the use conflicts with local policy, causes neighbour harm, breaches HMO concentration limits or creates parking, noise or amenity problems.
Landlords should not treat retrospective planning as a safety net.
It is usually far better to check before changing use.
Neighbour impact
Planning decisions often consider the impact on neighbours.
This can include:
- noise;
- disturbance;
- loss of privacy;
- parking;
- traffic;
- waste;
- comings and goings;
- pressure on communal areas;
- anti-social behaviour;
- intensification of use;
- loss of family housing;
- effect on local character.
A landlord may see a property as an investment. The planning authority may see the wider impact on the street, building or community.
Leasehold properties
Leasehold landlords need to check more than planning.
A lease may restrict:
- subletting;
- short-term lets;
- HMOs;
- business use;
- flat sharing;
- pets;
- alterations;
- flooring;
- use of common parts;
- guest access;
- key safes;
- signage.
A landlord may obtain planning permission and still breach the lease.
The lease, planning permission, mortgage and insurance all need to align.
Mortgage and insurance
Planning permission does not equal mortgage consent or insurance cover.
A lender may allow a standard buy-to-let but not an HMO, short-term let or serviced accommodation.
An insurer may cover a family let but not holiday guests, high occupancy or company worker accommodation.
Landlords should check:
- mortgage conditions;
- insurance policy wording;
- tenant type;
- occupation type;
- HMO status;
- short-term guest use;
- vacant periods;
- business use;
- lease restrictions.
A planning permission alone does not protect the landlord if the mortgage or insurance position is wrong.
Building regulations
Planning permission and building regulations are separate.
A landlord may need both.
For example:
- converting a loft may need building regulations approval and may raise planning questions;
- creating flats may need both;
- HMO layout changes may need fire safety and building regulation input;
- adding bathrooms may affect drainage and ventilation;
- changing windows may affect building standards;
- creating new bedrooms may affect escape routes.
Do not confuse permission to use the property with approval that the works are technically compliant.
Evidence and records
Landlords should keep planning records carefully.
These may include:
- planning permissions;
- lawful development certificates;
- planning decision notices;
- drawings;
- planning conditions;
- correspondence with the council;
- Article 4 checks;
- HMO planning confirmations;
- short-term let advice;
- enforcement correspondence;
- legal advice;
- building regulations approvals;
- completion certificates;
- lease consents;
- mortgage and insurance confirmations.
Planning paperwork can be important when selling, remortgaging, licensing or responding to complaints.
Common landlord mistakes
1. Thinking planning only applies to building work
Use changes can need permission too.
2. Assuming HMO licensing covers planning
HMO licensing and planning are separate.
3. Ignoring Article 4 directions
Local rules can remove permitted development rights.
4. Treating short-term lets as ordinary letting
High-turnover guest accommodation can raise planning issues.
5. Relying on what other landlords are doing
Nearby properties may have permission, historic use or may simply be non-compliant.
6. Forgetting Wales has different HMO rules
Landlords should check the country and council area.
7. Applying retrospectively after complaints
Retrospective planning permission is not guaranteed.
Practical checklist for landlords
Before changing the use of a rental property, landlords should ask:
- what is the current lawful use?
- what is the proposed use?
- does the change need planning permission?
- is the property in an Article 4 area?
- are there planning conditions?
- is the property in England or Wales?
- will the property become an HMO?
- how many occupiers will live there?
- will occupation be by one household or unrelated sharers?
- will the property be used for short-term lets?
- will there be high guest turnover?
- is serviced accommodation being proposed?
- will the property be subdivided?
- are outbuildings being used as accommodation?
- could neighbour impact increase?
- is building regulations approval needed?
- do mortgage and insurance terms allow the use?
- does the lease allow the use?
- should a lawful development certificate be obtained?
The key takeaway
Planning permission is not only about extensions, walls and rooflines.
For landlords, it can also be about how the property is used.
HMOs, short-term lets, serviced accommodation, flat conversions, rent-to-rent arrangements, business use and outbuilding accommodation can all change the planning position.
The safest approach is to check before changing the use, especially where occupancy increases, guest turnover rises or the property stops looking like an ordinary home in planning terms.
In rental property, the question is not just “can I let it?” It is also “can I lawfully use it in this way?”
NetRent does not provide legal advice, planning advice, building control advice, surveying advice, mortgage advice, insurance advice or tax advice. This article represents our understanding of rental property planning and compliance issues at the time of writing. Landlords should take professional advice where required.
Telephone: 01352 721300
Email: support@netrent.co.uk