Permitted Development Extensions in Merton

We provide clear, professional guidance on permitted development extensions in Merton and surrounding areas. Whether you’re planning a rear, side, or two-storey extension, understanding local planning constraints and national permitted development limits is essential before work begins.

Common Permitted Development Issues in Merton

• Permitted development rights removed by planning condition
• Article 4 Direction restrictions
• Extension covering more than 50% of garden area
• Extension built beyond original rear wall line
• Outbuilding positioned forward of principal elevation
• Prior approval required but not obtained

Property Types We Advise On in Merton

• Townhouses
• Chalet-style houses
• Semi-detached houses
• Properties with previous extensions
• Victorian properties

Frequently Asked Questions

Can I extend a flat under permitted development?

Flats and maisonettes generally do not benefit from permitted development rights for extensions.

Do conservation areas affect permitted development rights?

Yes. Properties within conservation areas often have additional restrictions, and some permitted development rights may be limited or removed entirely.

Does an Article 4 Direction affect my extension plans?

Yes. Article 4 Directions remove certain permitted development rights, meaning planning permission may be required.

Can I add a balcony to my extension?

Balconies and raised platforms are not permitted development and usually require planning permission.

Can I remove a chimney without permission?

External alterations may require permission depending on property type and location.

Can I build a two-storey extension without planning permission?

Two-storey extensions are sometimes permitted, but stricter limits apply to height, rear projection distance, and window placement to avoid overlooking neighbours.

If you're planning an extension in Merton and want to confirm whether it qualifies under permitted development rules, request a free assessment today and get clarity before you build.