Can you replace a door without planning permission in 2026?
Replacing a front or rear door is one of the most common home improvements, but the rules around when you need planning permission are not always straightforward. The key distinction is between like-for-like replacement and a significant change in size, position, or appearance.
Yes, you can replace a door without planning permission in 2026 under permitted development, saving the £258 application fee. The new door must not project more than 20cm beyond the wall and must be similar in size to the original.
- Like-for-like door replacement usually needs no planning permission under PDR.
- New door must not project more than 20cm beyond the existing wall.
- Rear porch or canopy volume must stay under 3m³.
- Side-facing doors need obscure glazing above 1.7 metres.
- Conservation areas and listed buildings have stricter PDR restrictions.
- Can you replace a door without planning permission in 2026?
- What are permitted development doors?
- Quick numbers costs, savings, and payback
- Building Regulations compliance for door replacements
- Using a registered installer FENSA and CERTASS
- Can I replace my front door without planning permission?
- Sliding and bi-fold doors under permitted development
- Doors in conservation areas
For most homeowners, replacing a door under permitted development rights (PDR) is allowed without a planning application, saving the £258 application fee in England (GOV.UK planning application fees, 2026). However, the door must meet specific size, projection, and location rules set out in the Town and Country Planning (General Permitted Development) Order 2015 (as amended).
What are permitted development doors?
Permitted development doors are any door installation or replacement that does not need a planning application because it meets the rules in the Town and Country Planning (General Permitted Development) Order 2015 (as amended). The core rule is that the new door must not project more than 20cm beyond the plane of the existing wall (GOV.UK technical guidance, 2026).
For a rear door, any new porch or canopy must have an overall volume under 3m³. For a side-facing door, any new glazing must be obscure glass to at least 1.7 metres above floor level to protect neighbour privacy. The replacement must not be materially different in size from the original — a significantly larger or repositioned door would likely require a full planning application.
If your home is in a conservation area, listed building, or Area of Outstanding Natural Beauty (AONB), permitted development rights are more restricted (Historic England guidance, 2026).
Quick numbers costs, savings, and payback
The table below summarises the typical costs and savings associated with a door replacement under permitted development in 2026.
| Item | Typical 2026 figure | Source |
|---|---|---|
| Average cost of new composite door (supply & fit) | £1,200–£1,800 | Glass and Glazing Federation 2026 market report |
| Average cost of new uPVC door (supply & fit) | £800–£1,200 | Glass and Glazing Federation 2026 market report |
| Planning application fee (England) | £258 | GOV.UK planning application fees, 2026 |
| Energy saving from new door (annual) | £50–£100 | Energy Saving Trust, 2026 |
| Typical payback period on energy savings alone | 12–36 years | Energy Saving Trust, 2026 |
| Increase in property value from new front door | 5–10% of door cost | Nationwide Building Society house price index 2026 |
Building Regulations compliance for door replacements
Even when planning permission is not needed, all new or replacement doors must comply with Building Regulations. The door must achieve a U-value of 1.6 W/m²K or lower (Building Regulations Approved Document L1A, 2021 edition as in force in 2026). A Building Regulations compliance certificate is required — your installer must notify the local authority or use a Competent Persons Scheme (GOV.UK Building Regulations approval for doors, 2026).
If the door is part of a new opening in a load-bearing wall, you must also comply with Part A of the Building Regulations (structural safety) (Approved Document A, 2026). Failure to comply can lead to enforcement action and difficulty selling the home.
Using a registered installer FENSA and CERTASS
For a permitted development door replacement, you must use an installer registered with a Competent Persons Scheme such as FENSA or CERTASS (GOV.UK Competent Persons Scheme register, 2026). These schemes allow the installer to self-certify compliance with Building Regulations, avoiding the need for a separate local authority inspection.
If you use an unregistered installer, you must apply for Building Regulations approval directly from your local authority, which costs an additional £100–£250 (based on typical local authority building control fees in 2026). For gas-safe doors (e.g., a door with an integrated gas hob or fire), the installer must be Gas Safe registered (Gas Safe Register, 2026).
how to choose a FENSA-registered door installer
Can I replace my front door without planning permission?
The direct answer is yes, for most homes, as long as the door is a like-for-like replacement in size, position, and appearance. The rule is that the new door must not project more than 20cm beyond the existing wall (GOV.UK technical guidance, 2026).
It must not be a different shape or significantly larger — a standard 900mm x 2100mm door replaced with a 1200mm x 2400mm door would likely need planning permission. If you are adding a new door where none existed before (e.g., creating a new opening from a living room to the garden), that is a new opening and may need planning permission if it materially alters the appearance of the property.
For flats and maisonettes, permitted development rights are much more restricted and a planning application is almost always needed (Planning Portal, 2026). If your home is listed, any door replacement, even like-for-like, requires listed building consent (Historic England, 2026).
Sliding and bi-fold doors under permitted development
If you are replacing a rear door with a sliding or bi-fold door, the same permitted development rules apply for the door itself. The 20cm projection rule still applies (GOV.UK technical guidance, 2026). The U-value requirement for the glazed sections remains 1.6 W/m²K (Building Regulations Approved Document L1A, 2026).
If the new door is significantly wider than the old one (e.g., replacing a single door with a 4-panel bi-fold), you may need a structural calculation for the new lintel (Approved Document A, 2026). For bi-fold doors, the threshold must be level-access compliant if the door leads to a patio or deck and the home is being adapted for a disabled occupant (Building Regulations Approved Document M, 2026).
Doors in conservation areas
If you live in a conservation area, you can still replace a door under permitted development, but the new door must match the original in design and materials. Any door on a front or side elevation that faces a highway must be of a traditional design and material (e.g., timber, not uPVC) (GOV.UK conservation area guidance, 2026).
The door must not be materially different in appearance — a modern composite door replacing a Victorian panelled door would likely require planning permission. For rear doors in a conservation area, the same 20cm projection rule applies, but the local authority can issue an Article 4 direction to remove permitted development rights entirely (Planning Portal Article 4 directions, 2026). You can check if your property is in a conservation area and if an Article 4 direction is in place on your local authority’s website.
how to check if your home is in a conservation area
Frequently Asked Questions
Yes, if the replacement is like-for-like in size and position. Under permitted development rights, you avoid the £258 planning application fee (GOV.UK, 2026). The door must not project more than 20cm beyond the wall plane.
The 20cm rule means any new door or porch must not project more than 20 centimetres beyond the plane of the existing wall (GOV.UK technical guidance, 2026). This applies to both front and rear doors.
No, if the replacement is materially the same size and does not add a porch exceeding 3m³ in volume. Permitted development rights cover most rear door replacements (Ofgem, 2026).
It depends on size and glazing. A new side-facing door must use obscure glass to at least 1.7 metres above floor level (Historic England guidance, 2026). If significantly larger than the original, you may need planning permission.
Yes, conservation areas, Areas of Outstanding Natural Beauty, and listed buildings have more restricted permitted development rights (Historic England guidance, 2026). You may need planning permission even for like-for-like replacements.
