Permitted Development Extensions in Iver

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

• Raised decking exceeding permitted height
• Two-storey extension too close to rear boundary
• Overall height above permitted maximum
• Extension covering more than 50% of garden area
• Prior approval required but not obtained
• Outbuilding positioned forward of principal elevation

Property Types We Advise On in Iver

• Rural properties
• Chalet-style houses
• New build developments
• Properties with previous extensions
• Victorian properties

Frequently Asked Questions

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.

How is the original house defined for measurement purposes?

The “original house” refers to the property as it stood on 1 July 1948 or when it was first built, not including later extensions.

Does building regulations approval still apply?

Yes. Even if planning permission is not required, building regulations approval is usually still necessary.

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.

How high can my extension be?

Height limits vary, but rear extensions under permitted development generally cannot exceed four metres for detached houses or three metres for others.

Can I build over a sewer?

Building near or over a public sewer may require a build-over agreement from the relevant water authority.

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