Do You Need Planning Permission for an Oak Garage?
In most cases, no — you can build an oak framed garage under permitted development rights without applying for planning permission. However, the rules have specific conditions around height, placement, and how much of your garden you can build on.
At Sussex Oak Structures, we’ve designed and built hundreds of oak framed garages across Sussex and Surrey. We know exactly what falls within permitted development and when you’ll need to submit a planning application. This guide covers everything you need to know before starting your project.
Permitted Development Rules for Oak Garages
Permitted development rights allow homeowners to build certain structures — including garages — without formal planning permission. The rules are set out in the Town and Country Planning (General Permitted Development) Order and apply across England.
For an oak garage to qualify as permitted development, it must meet all of the following conditions:
Height Restrictions
The maximum height of your oak garage depends on the roof type and how close it is to your boundary:
| Roof Type | Maximum Height |
| Dual-pitched roof (traditional) | 4 metres to the ridge |
| Flat roof or mono-pitch | 3 metres |
| Within 2 metres of a boundary | 2.5 metres (any roof type) |
Most oak framed garages use traditional dual-pitched roofs, which means the 4-metre height limit applies. This comfortably accommodates single-storey garages with good headroom for vehicles, storage, and even a mezzanine level in some designs.
Important: If you want a garage with room above for a home office, gym, or guest accommodation, the structure will almost certainly exceed 4 metres. This means you’ll need planning permission.
The 50% Rule
Your garage (and any other outbuildings) must not cover more than 50% of the total area of land around the original house. This is sometimes called the “curtilage” rule.
For most properties with reasonable-sized gardens, this isn’t a limiting factor. However, if you’ve already built extensions, garden rooms, or other outbuildings, you’ll need to calculate whether adding a garage keeps you under the 50% threshold.
Placement Rules
To qualify as permitted development, your oak garage must:
- Be positioned behind the principal elevation (front wall) of your house
- Not be built on land in front of your home facing a highway
- Be used for purposes incidental to the enjoyment of the house — parking, storage, hobbies, or a workshop
A garage used as self-contained living accommodation or a separate business premises would not qualify and would require planning permission.
Boundary Distances
While there’s no minimum distance from boundaries for garages under permitted development, remember that the 2.5-metre height limit applies if you’re building within 2 metres of any boundary. This can significantly impact your design options.
We often advise clients to position their oak garage at least 2 metres from boundaries where possible, allowing for the full 4-metre ridge height and more flexibility in design.
When You WILL Need Planning Permission
Even if your garage meets all the size and placement requirements, there are situations where permitted development rights don’t apply:
Conservation Areas and Areas of Outstanding Natural Beauty (AONB)
If your property is in a conservation area or AONB — common across much of Sussex, including the South Downs National Park — additional restrictions apply:
- No outbuildings to the side of the house
- Maximum footprint of 10 square metres without permission
- Stricter controls on materials and design
Many of our clients in areas like Chichester, Lewes, and the Sussex Weald villages need to apply for planning permission due to these restrictions.
Listed Buildings
If your home is a listed building, you’ll need listed building consent as well as planning permission for any new structure within its curtilage. This applies regardless of the garage’s size. Historic England provides guidance on what work requires consent.
Article 4 Directions
Some local authorities have removed permitted development rights in specific areas through Article 4 directions. This is common in historic town centres and sensitive rural locations. Your local planning authority can confirm whether this affects your property.
Previous Extensions
If your home has been significantly extended, you may have already used up your permitted development allowance. The 50% rule includes all previous outbuildings and extensions when calculating available space.
Two-Storey Garages
Any oak garage with a full upper floor — whether for accommodation, a home office, or storage — will exceed the 4-metre height limit and require planning permission. See our garage with room above designs for examples of what’s possible with planning approval.
Building Regulations vs Planning Permission
It’s important to understand that building regulations and planning permission are different things.
Planning permission relates to whether you’re allowed to build a structure at all — its size, position, and impact on neighbours and the local area.
Building regulations ensure the structure is safe, structurally sound, and meets current standards for things like foundations, fire safety, and electrical installations. The Government’s building regulations guidance explains when approval is required.
When Do Building Regulations Apply?
For most detached oak garages used purely for parking or storage:
- Exempt if under 30 square metres with no sleeping accommodation
- Exempt if 30-70 square metres, more than 1 metre from any boundary, and built from substantially non-combustible materials
However, building regulations WILL apply if your garage contains sleeping accommodation, has plumbing or complex electrical systems, is attached to the house, or exceeds 70 square metres.
Foundation Requirements
Regardless of building regulations exemptions, your oak garage needs proper foundations for structural stability. The type and depth depend on ground conditions, structure size, and local factors like tree roots and drainage.
We typically recommend concrete strip foundations or a reinforced concrete slab for oak framed garages. Our team assesses each site individually and specifies foundations that will ensure your garage remains stable for decades.
Planning Permission for Garages: The Application Process
If you do need planning permission, here’s what to expect:
Pre-Application Advice
Most local authorities offer a pre-application advice service. For a fee (typically £50-150), a planning officer will review your proposals and give informal feedback before you submit a full application. This can save time and money by identifying potential issues early.
Full Application
A planning application for an oak garage typically requires:
- Completed application form
- Site location plan (1:1250 or 1:2500 scale)
- Block plan showing the garage position (1:500 scale)
- Elevations and floor plans (1:50 or 1:100 scale)
- Design and access statement
- Application fee (currently around £258 for a new outbuilding)
You can submit applications through the Planning Portal or directly to your local authority.
Decision Timescales
Local authorities aim to decide householder applications within 8 weeks. More complex cases or those requiring heritage consultations may take longer.
How Sussex Oak Structures Can Help
We offer a complete planning application service, handling the entire process from initial drawings to submission and liaison with planning officers. We’ve successfully secured approvals across Sussex and Surrey, including in challenging locations like conservation areas and the South Downs National Park.
Local Planning Authorities in Sussex and Surrey
Different councils have slightly different interpretations of planning policy. Here’s a quick overview of the main authorities in our area:
| Authority | Key Considerations |
| Horsham District Council | Large rural area, many conservation villages, AONB in north |
| Mid Sussex District Council | High Weald AONB, strict on countryside development |
| Chichester District Council | South Downs National Park, many conservation areas |
| Lewes District Council | Most of district within South Downs National Park |
| Wealden District Council | High Weald AONB, dispersed rural settlements |
| Waverley Borough Council | Surrey Hills AONB, Green Belt constraints |
We have experience working with all of these authorities and understand their specific requirements.
Frequently Asked Questions
Does a carport need planning permission?
Usually not. Open-sided carports typically qualify as permitted development, provided they meet the same height and placement rules as garages. Our 1 bay oak garage designs include open-fronted options that work well as carports.
Can I build a garage at the front of my house?
Not under permitted development. Garages must be positioned behind the principal elevation of your house. A front-of-house garage would require planning permission and is unlikely to be approved.
How close to my boundary can I build an oak garage?
There’s no minimum distance, but if you build within 2 metres of a boundary, the maximum height is reduced to 2.5 metres. For most oak garages with traditional pitched roofs, we recommend staying at least 2 metres from boundaries.
Do I need permission for a garage with a room above?
Yes. A garage with a full upper floor will exceed the 4-metre permitted development height limit, so planning permission is required. We’ve designed many garages with rooms above and can manage the planning application for you.
What’s the maximum size garage I can build without permission?
There’s no specific size limit, but the garage (combined with all other outbuildings) must not cover more than 50% of your garden area. It must also stay within the height limits: 4 metres for a pitched roof, 3 metres for flat roofs, or 2.5 metres if within 2 metres of a boundary.
Do I need building regulations approval for a garage?
For most detached garages under 30 square metres used purely for parking or storage, building regulations don’t apply. Larger garages (30-70 square metres) may also be exempt if positioned more than 1 metre from boundaries. Any garage with sleeping accommodation or complex services will need building regulations approval.
Next Steps
If you’re considering an oak framed garage, we’re here to help you navigate the planning process:
- Free consultation — We’ll visit your property, discuss your requirements, and advise on what’s achievable under permitted development
- Design development — Our bespoke design service creates plans tailored to your site
- Planning support — If permission is required, we handle the entire planning application process
- Build — Our craftsmen construct your oak garage to the highest standards
Browse our oak framed garage designs or view our portfolio to see examples of our work across Sussex and Surrey.
Ready to discuss your project? Get in touch for a free, no-obligation consultation.
Sussex Oak Structures designs, manufactures, and builds bespoke oak framed garages, garden rooms, porches, and houses across Sussex and Surrey.
