Permitted Development Extensions in Harlington

We provide clear, professional guidance on permitted development extensions in Harlington 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 Harlington

• Outbuilding positioned forward of principal elevation
• Side extension exceeds half the width of the original house
• Permitted development rights removed by planning condition
• Rear extension exceeds permitted projection limits Harlington
• Listed building restrictions
• Extension on a flat or maisonette

Property Types We Advise On in Harlington

• New build developments
• Properties with outbuildings
• 1930s suburban homes
• Bungalows
• Properties within conservation areas

Frequently Asked Questions

Can I extend a house that has already been extended?

Permitted development limits are cumulative, so previous extensions may reduce what is still allowed.

What is the difference between planning permission and building regulations?

Planning permission controls development impact, while building regulations ensure structural safety and compliance.

Can I amend my plans after submission?

Minor amendments may be accepted during determination, depending on the council.

Are there restrictions on side-facing windows?

Yes. Upper-floor side-facing windows typically must be obscure-glazed and non-opening below a certain height.

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.

Can I build right up to my boundary?

It depends on height and location. Boundary proximity affects allowable eaves height.

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