Quick answer
Most planning applications in Oxford go to Oxford City Council, and elsewhere in Oxfordshire to the district council. A householder application for an extension costs £548 from April 2026 and usually takes about eight weeks. Many extensions and lofts don’t need permission at all, but conservation areas and Article 4 directions often change that.
Planning permission is the council’s approval for building work or a change of use. Whether you need it, and how hard it is to get, depends on the project, the house and where it is. Oxford has more conservation areas and local restrictions than most places, so it pays to check early. Here’s how it works across Oxford and Oxfordshire in 2026.
Do you need planning permission?
Many home improvements are permitted development: national rules let you build them without applying, as long as they stay within set limits. Our guide to permitted development in Oxford covers the limits in detail. The table below is a quick first check.
| Project | Planning permission needed? |
|---|---|
| Single-storey rear extension | Often not, within depth and height limits. A larger rear extension can go through the prior approval process instead. |
| Loft conversion | Often not, within volume limits. Dormers facing the road, and most roof changes in a conservation area, need permission. |
| Garden room or outbuilding | Usually not, if it is behind the house, under 2.5 m high within 2 m of a boundary and covers less than half the garden. |
| Porch | Not if the floor area is under 3 m², it is under 3 m high and it is at least 2 m from a boundary with a road. |
| Fence or wall | Not up to 2 m high, or 1 m next to a road. |
| Decking | Not if it is no more than 30 cm above the ground. |
| Replacement windows | Not if they look similar to the existing ones. In an Article 4 area, such as Jericho or Osney Town, you may need permission. |
| Turning a house into a small HMO in Oxford | Yes. A city-wide Article 4 direction removes this right. |
| Any work to a flat or maisonette | Usually yes. Flats have no householder permitted development rights. |
| Work to a listed building | Listed building consent, for inside work too, and often planning permission as well. |
If you’re not sure, apply for a lawful development certificate. It costs £274 for proposed work and gives you written proof that the project doesn’t need permission, which buyers’ solicitors often ask for later.
Who decides: the five planning authorities
Oxfordshire has five planning authorities. The one you apply to depends on where the property is. Oxfordshire County Council handles minerals, waste and its own schools and roads, not house extensions.
| Council | Covers, for example |
|---|---|
| Oxford City Council | Oxford, including Headington, Summertown, Jericho, Cowley and Botley Road |
| Cherwell District Council | Banbury, Bicester and Kidlington |
| West Oxfordshire District Council | Witney, Woodstock, Eynsham, Carterton, Burford and Chipping Norton |
| South Oxfordshire District Council | Henley-on-Thames, Thame, Wallingford, Wheatley and most of Didcot |
| Vale of White Horse District Council | Abingdon, Wantage, Faringdon, Cumnor and Kennington |
Each council has its own local plan and design guidance, and they don’t all read applications the same way. A dormer that passes easily in one district can struggle in another, so it helps to know the local policies before the drawings are finished. See our builders in Oxfordshire page for how we work across the county.
Planning application fees in 2026
Planning fees in England are set nationally, so every council charges the same. They rise each April with inflation, and the government has consulted on further changes, so check the current figure before you apply.
| Application | Fee from 1 April 2026 |
|---|---|
| Householder application (extension or alteration to one house) | £548 |
| Full application for a new home (fewer than 10) | £610 per home |
| Lawful development certificate, proposed work | £274 |
| Lawful development certificate, existing work | £548 |
| Prior approval for a larger rear extension | £249 |
| Discharge of conditions (householder) | £89 |
| Non-material amendment (householder) | £46 |
The fee is rarely the biggest cost. Add the drawings, and any surveys the council needs, such as a heritage statement in a conservation area, a tree survey or a flood risk assessment. If you apply online through the Planning Portal, it adds a service charge of about £91.
How long planning permission takes
| Stage | Typical time |
|---|---|
| Validation (the council checks the application is complete) | Usually one to two weeks, longer if something is missing |
| Neighbour and public consultation | 21 days |
| Decision, householder and minor applications | Target of 8 weeks from validation |
| Decision, major applications | Target of 13 weeks |
| Time to start work once approved | 3 years, unless the permission says otherwise |
Allow two to three months from submission to decision for a typical extension, more if the planning officer asks for changes. If permission is refused, you can change the design and apply again, or appeal. For householder applications the appeal deadline is 12 weeks from the decision.
How to apply
For a typical extension or loft conversion, the steps are:
- Check the constraints. Is the house listed, in a conservation area or covered by an Article 4 direction? Have its permitted development rights been removed? This is common on newer estates.
- Consider pre-application advice. Oxford City Council and the district councils offer paid pre-application advice. It is worth it for anything unusual or in a sensitive location.
- Get the drawings done. You need a location plan, a site or block plan, and existing and proposed floor plans and elevations, all to scale.
- Submit the application through the Planning Portal or the council’s own website, with the fee and any supporting documents.
- Talk to the neighbours. The council will notify them anyway, and a conversation first often heads off objections.
Conservation areas, listed buildings and Article 4 in Oxford
Oxford has 18 conservation areas, from the city centre and Jericho to Headington Hill and the meadows at Wolvercote and Godstow. In a conservation area you lose some permitted development rights. Side extensions, extensions of more than one storey at the rear, roof extensions such as dormers, and new cladding all need planning permission.
Article 4 directions remove further rights in specific places. In Oxford there are directions in areas such as Jericho, Osney Town and Wolvercote Green, which can bring changes to windows, doors and front boundaries under planning control. A city-wide direction also means that turning a family house into a small HMO needs permission.
Listed buildings need listed building consent for any work that affects their character, inside or out. There is no fee, but the drawings and heritage information need to be thorough, and work without consent is a criminal offence.
Planning permission and building regulations
Planning permission and building regulations are two separate approvals. Planning looks at how a building looks, how it’s used and its effect on the neighbours. Building regulations look at how it’s built: structure, fire safety, insulation, ventilation and drainage. Most extensions and loft conversions need building regulations approval even when they don’t need planning permission. Our guide to building regulations in Oxford explains that side.
How we help
We handle planning, building control and party wall notices for our clients, working with architects we know across Oxfordshire. We’ll tell you early whether a project is likely to need permission, which council it goes to and what the planners there tend to look for. Find out more about our house extensions in Oxford, loft conversions and new build homes, or get in touch to talk about your project.
Frequently asked questions
How long does it take to get planning permission in Oxford?
Councils aim to decide householder and other minor applications within eight weeks of the application being validated, and major applications within 13 weeks. Allow extra time for validation at the start and for any changes the planning officer asks for.
What can you build without planning permission?
Many single-storey rear extensions, loft conversions, garden rooms, porches and outbuildings are permitted development, as long as they stay within size and position limits. Flats, listed buildings and homes in conservation areas or under an Article 4 direction have fewer or no permitted development rights.
How do I check if a property has planning permission?
Search the council’s online planning register by address. In Oxford that is Oxford City Council’s public access system; the other Oxfordshire districts run their own. The record shows past applications, decisions and conditions.
How much does planning permission cost?
The council fee for a householder application in England is £548 from 1 April 2026, and £610 for each new home on a small site. Drawings, surveys and the Planning Portal service charge usually cost more than the fee itself.
What is the 7-year rule for planning permission?
There isn’t one in England. Since 25 April 2024 the council has ten years to take enforcement action against any breach of planning control. The old four-year rule only still applies to building work finished before that date.
Can I draw my own plans for planning permission?
Yes, if they’re accurate, to scale and include everything the council needs: a location plan, a site or block plan, and existing and proposed floor plans and elevations. Most people use an architect or a planning drawing service, because a missing drawing stops the application being validated.
How long does planning permission last?
Usually three years. You need to start work within three years of the decision date, or the permission lapses and you have to apply again.
Can I start building before planning permission is granted?
You can, but it’s at your own risk. If permission is refused, the council can take enforcement action and make you remove the work.
Sources: Oxford City Council: check if you need planning permission; Oxford City Council: conservation areas; GOV.UK: fees for planning applications. Fees and rules checked October 2026.
