Step 1 of 3

What are you planning to do?

Select the area of your property to start an instant planning check.

Not sure?

Click any part of the property to see common projects in that area.

How Plan Check works

Select an area

Choose the part of your property you want to work on.

Answer key questions

Add the information needed for an initial planning screen.

Get your result

Receive an instant assessment, confidence level and next steps.

What is permitted development?

It allows certain household works, such as some extensions, loft conversions and garden buildings, to be carried out without applying for full planning permission, but only where the proposal meets the relevant limits and conditions.

Plan Check helps you understand whether your project may fall within these rules. However, it is still important to check the position before starting work, as restrictions can apply to individual properties and local areas. Getting this right early can help avoid costly surprises later, including the risk of enforcement action.

To formally confirm that your proposal is lawful, you can apply to your Local Planning Authority for a Lawful Development Certificate.

Professional output

Prepared by a qualified planning professional.

The premium review reflects reasoned professional judgement having regard to legislation, national policy and typical Local Planning Authority interpretation.

Start assessment

Step 2 of 3

Check your rear project

The instant planning check is an automated screening tool. It applies standard planning rules to the information entered but does not take into account full site-specific circumstances, planning history, or local constraints.

It should be used as an initial indication only and not relied upon as a substitute for a detailed professional assessment.

100% private & secure. Your details are used only to generate your assessment and process any review request.

Project details

Single storey rear extension

Email for review follow-up (optional)PostcodeProperty typeProposal typeMaximum heightExtension depthEaves heightDistance to nearest boundarySite coverage — % of garden covered by extensions & outbuildings

Forward of principal elevationUsually higher riskBalcony / raised platformOften outside simple PDMaterials broadly matchRelevant for external alterationsDesignated landMay restrict permitted developmentArticle 4 DirectionPD rights may be removedListed buildingSeparate listed building consent may be requiredConservation areaMay affect the planning position