One of the most common questions we get at YPDS is: “Do I actually need planning permission for my extension?” The answer depends on the size, position, and type of your project. Here’s a plain-English guide to the rules for homeowners in Leeds.

Permitted Development vs Full Planning Permission

In England, many domestic extensions can be built under Permitted Development (PD) rights — a government scheme that allows certain works without needing to apply for planning permission. However, these rights have limits, and exceeding them means you’ll need a householder planning application to Leeds City Council.

What Can You Build Under Permitted Development?

For a typical house in Leeds (not a flat, listed building, or property in a conservation area), you can generally build under PD rights if your extension:

• Extends no more than 4 metres from the rear of a detached house, or 3 metres from a semi or terraced house (at ground floor)
• Does not exceed 50% of the curtilage (garden area) when combined with all existing outbuildings and extensions
• Is single storey with a ridge height no greater than 4 metres
• Does not extend beyond the original front wall of the house
• Is not forward of the principal elevation (the front of the house)

Two storey extensions always require full planning permission under householder rules.

The Prior Approval Scheme (Larger Home Extension)

Since 2020, the Prior Approval scheme allows single storey rear extensions of up to 8 metres (detached) or 6 metres (semi/terraced) under a neighbour consultation process. Your neighbours get 21 days to raise objections, and Leeds City Council must respond within 42 days. YPDS handles this process for you.

When Do You Definitely Need Full Planning Permission?

You’ll need a full householder planning application if your project:

• Exceeds the PD limits above
• Is on a listed building or in a conservation area
• Involves a side extension wider than half the original house width
• Is a two storey extension
• Has had PD rights removed by condition (some new-build estates in Leeds have Article 4 directions)

Leeds City Council and Your Application

A householder planning application to Leeds City Council costs £548 (2026) and takes 8 weeks to determine. Your application needs: a site location plan, a block/roof plan, and existing and proposed floor plans and elevations. YPDS produces all of these as part of our standard drawings package.

Leeds is generally supportive of well-designed extensions, particularly in suburban areas. Our team knows what local planning officers expect and designs to minimise the risk of refusal.

Do You Need a Lawful Development Certificate?

Even if your extension falls within PD rights, we often recommend applying for a Lawful Development Certificate (LDC). This is a formal document from Leeds City Council confirming that your extension is lawful. It’s not compulsory, but it protects you when you sell the property — mortgage lenders and conveyancers routinely ask for it.

YPDS can prepare and submit an LDC application alongside your planning drawings at no extra design cost.

Not Sure Where You Stand?

Drop us a line for a free initial consultation. We’ll review your property, tell you exactly what you can build under PD rights and what needs planning permission, and give you a fixed fee for the drawings. Contact YPDS today.