Landlord Permitted Development Rights UK 2026, What You Can Do Without Planning Permission

PD rights for extending a dwellinghouse (Class A)

Under Schedule 2, Part 1, Class A of the GPDO 2015, landlords can extend a single detached, semi-detached, or terraced dwellinghouse under permitted development subject to size and height limits:

• Rear extensions (single storey): up to 3m from the original rear wall for a semi-detached or terraced house; up to 4m for a detached house. These limits are extended to 6m and 8m respectively under the 'larger home extension' scheme, subject to a prior approval process
• Rear extensions (two storey): up to 3m from the original rear wall, must be at least 7m from the rear boundary, cannot be taller than the roof
• Maximum height: single-storey extension — 4m at the eaves; no taller than the original roof ridge
• Side extensions: must be single storey and no wider than half the width of the original house. Not permitted on designated land (National Parks, AONBs, conservation areas) without prior approval
• Loft conversions: up to 40 cubic metres (terraced) or 50 cubic metres (detached/semi) of additional roof space. No extension forward of the principal elevation, no verandas or balconies
• Works must not result in more than 50% of the original garden being covered by buildings (including any existing extensions or outbuildings)

C3 to C4 — converting a family home to an HMO

In England, the most commercially significant PD right for HMO landlords is the permitted change of use from a C3 dwellinghouse (family home) to a C4 small House in Multiple Occupation (3–6 unrelated occupants sharing facilities):

• What it allows: you can let a C3 family home to 3, 4, 5, or 6 unrelated individuals sharing kitchen and bathroom facilities without applying for planning permission, as long as there is no Article 4 Direction in place
• HMOs with 7 or more occupants fall outside C4 and into the 'sui generis' use class — a full planning application is always required for these larger HMOs, regardless of Article 4
• Article 4 Directions: hundreds of local authority areas have made Article 4 Directions removing the C3 to C4 PD right. In those areas, you must apply for planning permission before converting a family home to any HMO. Councils impose Article 4 Directions to control concentrations of student and HMO accommodation in specific streets or wards
• Checking Article 4: search your local planning authority's website for 'Article 4 Direction HMO' or check the council's online planning map. Many councils publish a list of affected streets. Planning portals also show whether a property is in an Article 4 area
• HMO licensing is separate: PD rights determine whether you need planning permission — they do not affect the obligation to hold an HMO licence under the Housing Act 2004. Mandatory licensing applies to HMOs with 5+ occupants in 2+ households; local authority additional licensing schemes extend this to smaller HMOs

Class MA — commercial to residential conversions

Since August 2021, Class MA in Schedule 2, Part 3 of the GPDO allows certain commercial buildings (Class E uses: offices, retail, restaurants, light industrial) to be converted to dwellinghouses under a prior approval process:

• Eligibility: the building must have been in Class E use for at least 2 years continuously and vacant for at least 3 months before the prior approval application
• Prior approval required: Class MA is not unconditional PD — you must submit a prior approval application and the council has 56 days to decide. The council can only refuse on defined grounds (flooding risk, noise, contamination, transport impact, adequate natural light, and impact on the provision of services such as healthcare and education)
• Size limit: no upper size limit, but the local planning authority may impose conditions relating to the form of development
• Article 4 Directions on Class MA: in designated areas (London, many city centres) councils have removed Class MA rights to protect commercial premises — check the local planning authority's position
• Class MA conversions can produce good rental yields in suburban town centres but require careful assessment of the prior approval conditions

Article 4 Directions — when PD rights are removed

An Article 4 Direction is an instrument made by a local planning authority that removes one or more permitted development rights from a specified area. For landlords, the most impactful are:

• C3 to C4 Article 4: removes the right to convert a family home to a small HMO without planning permission — the most common type affecting residential landlords
• HMO concentration thresholds: some councils combine Article 4 Directions with planning policies that refuse HMO applications in streets where HMOs already exceed a set proportion (often 10% or 20% of properties on a street)
• Extension restrictions in conservation areas: in conservation areas (and National Parks, AONBs, and Listed Building curtilages), many otherwise PD-permitted extension works require prior approval or full planning permission
• Class MA Article 4: London boroughs and many large cities have removed Class MA rights to protect employment land and high street commercial uses
• Article 4 Directions must be publicly notified and go through a statutory process; they are not retrospective — a C4 use lawfully established before an Article 4 Direction takes effect is lawfully continuing use. If you converted before the Article 4 was made, you have an existing lawful use (check the date the Article 4 was made)

Agricultural and rural conversions (Class Q)

Class Q in Schedule 2, Part 3 allows the conversion of agricultural buildings to dwellinghouses under a prior approval process. This is most relevant to landlords with barn conversion opportunities:

• What Class Q allows: up to 5 dwellinghouses per agricultural unit, with a total residential floorspace of up to 865 square metres across all units
• Building fabric condition: the building must be structurally capable of conversion without fundamental rebuilding — courts have confirmed that extensive new construction exceeds what Class Q permits
• Prior approval requirement: a prior approval application must be submitted for transport impacts, flooding risk, contamination, noise, and the design and external appearance
• England only: Class Q applies in England. Scotland, Wales, and Northern Ireland have different permitted development regimes
• Agricultural tenancies: if the building is subject to an agricultural tenancy, the conversion rights belong to the landowner, not the agricultural tenant

Key limits and things PD rights do not cover

Permitted development rights have significant limits. PD rights do NOT apply to:

• Listed buildings: any works (internal or external) to a listed building require listed building consent. PD rights do not apply
• Conservation areas (many works): demolition, cladding, large extensions, and certain roof alterations in conservation areas require prior approval or full planning permission even if they would otherwise be PD
• New builds: PD rights apply to established dwellinghouses — they cannot be used for newly built properties until they have been completed and occupied
• Flats and maisonettes: Part 1 PD rights (extensions) do not apply to flats. Loft conversions and rear extensions on ground floor flats are not PD
• Non-residential PD rights: PD rights for commercial properties, agricultural buildings, and infrastructure are covered under different Parts and Classes of the GPDO and have separate rules

Frequently asked questions