Do You Need Planning Permission for a Pergola?

Do you need planning permission for a pergola?

Usually not. The Planning Portal says "a pergola is classed as permitted development, meaning an application for planning permission is not required provided it meets specified conditions and limits". Those limits are the outbuilding rules:

• Near a boundary: if any part of it is within 2 metres of a boundary, the whole structure must be no more than 2.5 metres high.
• Away from boundaries: up to 3 metres overall, or 4 metres with a dual-pitched roof, with eaves no higher than 2.5 metres.
• Not at the front: nothing forward of the wall that forms the front of the house.
• Half the garden: together with extensions and other outbuildings, it covers no more than half the land around the original house.

If your pergola will sit near a fence or wall, the 2.5 metre limit is the one that matters. The government guidance is plain that the limit applies to "the total development", not only the part near the fence. I've written that rule up on its own in can a pergola be 2.5 metres high without planning permission?

How is a pergola's height measured?

From the highest ground right next to the pergola up to its highest point. In the government guidance's words, height is "measured from the highest ground level immediately adjacent to the building, enclosure or container to its highest point". On a sloping garden, measure from the uphill side. Anything you add on top, like a cover or a light fitting on the beams, counts towards the height.

What if the pergola is fixed to the house?

Then different rules apply. The government guidance says "buildings which are attached to the house are not permitted under Class E (they would be subject to the rules in Class A)", which are the extension rules. A freestanding pergola next to the house is often simpler. I've covered this in does fixing the pergola to the house make it an extension?

Does the floor under the pergola count?

Yes. The Planning Portal adds that "any platform must not exceed 0.3 metres in height". If the pergola sits on a raised deck, the deck has to meet the decking rules as well.

When does a pergola always need permission?

• Flats and maisonettes: the Planning Portal says these allowances apply to houses, not flats and maisonettes.
• Listed buildings: the Planning Portal says you'll need listed building consent and planning permission.
• The side of the house in a conservation area: on designated land, which includes conservation areas, structures at the side of the house need planning permission (Planning Portal).

BCP has 48 conservation areas across Bournemouth, Christchurch and Poole, including Christchurch Central, Mudeford Quay, Sandbanks, Ashley Cross and Westbourne. The council can also remove permitted development rights with an Article 4 Direction, so the government guidance advises checking with the council before you build.

Can I add a cover or side screens?

You can, but check the numbers again first. A cover sits on top, so it adds to the overall height, and the 2.5 metre limit near a boundary applies to the whole structure. Side screens or trellis panels are part of the structure, so they sit within the same height limits.

If you want shelter, an open slatted top gives shade and lets wind through. For exposed spots near the cliffs, see my guide to pergolas in windy coastal gardens.

How can I be sure before I build?

Ask BCP Council for a lawful development certificate. The government guidance describes it as the way "to be certain that a proposed development is lawful and does not require an application for planning permission". It's optional, but worth it if your design is close to a limit.

When I quote for a pergola, I measure it against your boundaries and ground before I draw anything, and tell you straight if it needs an application.

Pergola planning checklist:

• Within 2m of a fence or wall? Keep the whole thing at 2.5m or under.
• Freestanding or fixed to the house? Fixed means the extension rules.
• On a raised deck? The platform must stay within 0.3m.
• Flat, listed, or side of the house in a conservation area? Plan for an application.

Where these rules come from: Planning Portal, do I need planning permission for a pergola? · Planning Portal, outbuildings: planning permission · GOV.UK, Permitted development rights for householders: technical guidance · BCP Council, conservation areas. Checked October 2026. Rules change, so treat this as a guide and check your own address with BCP Council before you build.