Do I need planning permission for an extension?

One of the first questions homeowners ask is whether they need planning permission to extend. The good news is that many extensions in our area are allowed under permitted development rights, which means no full planning application. But the rules have limits, and parts of Enfield and Cheshunt have extra restrictions, so here is the plain-English version.

What permitted development usually allows

• Single storey rear extensions up to set depth limits (larger under the prior approval process).
• Side extensions within width and height limits.
• Many loft conversions within volume limits, with no dormers to the front.
• Reasonable outbuildings and some porches.

Permitted development comes with conditions on height, how close you build to boundaries, materials and how much of the garden you cover, so the detail matters.

When you do need full planning permission

• You exceed the permitted development size, height or coverage limits.
• The property is a flat or maisonette (permitted development does not apply).
• You are in a conservation area or the home is listed.
• An Article 4 direction has removed permitted development rights for your street.
• You are building to the front of the property.

Local catches in Enfield and Cheshunt

Enfield has conservation areas and some Article 4 directions that tighten what you can do without an application. Cheshunt sits under Broxbourne Council, with its own conservation areas. The safest move is to confirm your specific address rather than assume, because getting it wrong is expensive.

The simplest path

As a design and build team we check the planning position for your exact property and handle whichever route applies, permitted development with a lawful development certificate, or a full application. Start with our instant estimator and we will confirm your options at the free site visit.

Frequently asked questions