Adding a porch to the front of your home can transform its kerb appeal and provide a practical entrance space. But do you need planning permission for a porch? In most cases, no — porches are covered by permitted development rights in England, meaning you can build one without a planning application, provided you stay within the rules.

Permitted Development Rules for Porches

Porches fall under Class D of Schedule 2, Part 1 of the Town and Country Planning (General Permitted Development) (England) Order 2015. To qualify as permitted development, a porch must meet all of the following conditions:

• The ground floor area must not exceed 3 square metres (measured externally)
• The height must not exceed 3 metres
• The porch must be more than 2 metres from the boundary of the property where it fronts a highway (road or public footpath)

If your porch meets all three of these conditions, you do not need to apply for planning permission.

What Does 3 Square Metres Look Like?

Three square metres is the maximum ground floor area for a permitted development porch, measured externally (including the walls). To put this in perspective:

• A porch measuring 1.5m x 2m = 3 square metres ✓
• A porch measuring 1m x 3m = 3 square metres ✓
• A porch measuring 2m x 2m = 4 square metres ✗ (exceeds limit — planning permission required)

Keep in mind this is the external measurement, so the internal usable space will be slightly smaller due to wall thickness.

When Does a Porch Need Planning Permission?

You will need to apply for planning permission for a porch if:

• The ground floor area exceeds 3 square metres
• The height exceeds 3 metres
• The porch would be within 2 metres of a highway boundary
• Your home is a listed building (listed building consent required)
• An Article 4 Direction has removed PD rights in your area
• Your home is a flat or maisonette

Do Porches Need Building Regulations Approval?

This depends on the size and specification of the porch. Small, unheated porches with a door separating them from the main house may be exempt from building regulations. However, most porches will require building regulations approval, particularly if they:

• Include structural work (new foundations, lintels)
• Are heated or connected to the home’s heating system
• Involve electrical work
• Remove the existing front door (making the porch part of the heated envelope)

Always check with your local authority or an approved inspector before starting work.

Do You Need Architectural Drawings for a Porch?

Yes — for building regulations approval and to give your builder clear instructions, you will need proper architectural drawings. These should show the floor plan, elevations, foundation details, and any structural elements.

Our porch drawing packages are compliant with UK building regulations and permitted development rules, available as instant downloads at a fixed price — giving you everything you need to get started quickly.

Frequently Asked Questions

How big can a porch be without planning permission?

The maximum ground floor area is 3 square metres (measured externally) and the maximum height is 3 metres. The porch must also be more than 2 metres from the highway boundary.

Can I build a porch on a listed building without permission?

No. Listed buildings are not covered by permitted development rights. You will need listed building consent and possibly full planning permission for any alterations, including a porch.

Can I build a porch if I live in a conservation area?

Usually, yes. Porch rights (Class D) are not removed in conservation areas, so a porch within the limits (3m² ground area, 3m high, at least 2m from a highway boundary) is permitted development — unless an Article 4 Direction or a planning condition has removed the right. Check with your local planning authority if you are unsure.

Does a porch need a lawful development certificate?

It isn’t required, but it’s a good idea — especially if you plan to sell the property in future. An LDC from your local council provides formal confirmation that the porch was lawful under permitted development rules.

Need the drawings? See our porch drawing set — supplied exactly as sold and emailed to you as a PDF.