Do I Need Planning Permission for an Extension in St Albans?

Do I Need Planning Permission For a House Extension in St Albans?

One of the most common questions homeowners ask before starting an extension is whether planning permission is required.

In many cases, homeowners in St Albans can extend their property without a full planning application under Permitted Development Rights. However, there are strict rules that determine what can and cannot be built.

Understanding these rules early can save time, money and avoid problems with the local council.

When Planning Permission Is Not Required

Some house extensions fall under Permitted Development, meaning formal planning permission is not required.

Typical examples include:

• Single-storey rear extensions within certain size limits
• Small side extensions
• Loft conversions within volume limits
• Minor alterations to the house

However, these rules depend on several factors including the size of the extension, the location of the property and whether the home is within a conservation area.

St Albans contains many conservation areas, which can restrict permitted development rights.

When Planning Permission Is Required

You will usually need a householder planning application if:

• The extension is larger than permitted development limits
• The property is listed
• The house is located within a conservation area
• Previous extensions have already used permitted development allowances
• The extension significantly alters the appearance of the house

Most homeowners building large kitchen extensions or two-storey extensions will need planning permission.

What Drawings Are Required?

A planning application normally requires professional drawings including:

• Existing floor plans
• Proposed floor plans
• Existing and proposed elevations
• A site location plan
• A block plan

These drawings allow the planning officer to understand how the proposed extension will affect the surrounding area.

How Long Does Planning Permission Take?

For householder applications submitted to St Albans City & District Council, decisions typically take around:

8 weeks

However, applications can take longer if:

• Amendments are required
• Neighbours raise objections
• Additional information is requested

Getting Planning Drawings Prepared

Preparing clear and accurate drawings is an important part of a successful planning application.

At AG Developer Consultancy, we help homeowners across St Albans prepare professional planning drawings and manage the planning submission process.

This includes:

• Measured surveys
• Planning drawings
• Planning application submission
• Advice on permitted development vs planning

Planning Drawings in St Albans

If you are considering a house extension and want to understand your options, we can help guide you through the process.

Visit our Planning Drawings St Albans page to learn more.