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Retrospective planning and lawful development certificatesspecialist

If work has been carried out without planning permission, or you have received an enforcement notice from the council, you have options, and getting the right advice early makes a real difference. Retrospective planning is one of my specialisms as an ARB-registered architect, and I work in it regularly, so it is exactly the kind of problem I can help you with. I help homeowners and property owners put unauthorised work onto a proper, lawful footing.

A retrospective planning application asks the council to grant permission for development that has already been built. It is assessed on the same planning merits as any other application, so the way it is prepared and presented matters. Depending on the work, the right route might instead be a lawful development certificate, a change of use application, or prior approval, and part of my job is to advise which one fits your situation.

On more complex cases I work alongside a planning consultancy. Together we have resolved live enforcement notices and regularised works on listed buildings and in conservation areas: I carry out the measured survey and prepare the drawing package, and we present the application to the council as a coordinated submission. That combination of careful drawings and planning advocacy is what helps an application be understood on its merits.

What I cover

Retrospective planning applications for work already built, such as extensions, garage conversions, porches, loft and dormer alterations, and new boundary walls and gates.
Responding to a planning enforcement notice, and dealing with the council’s planning enforcement team on your behalf.
Lawful development certificates, for both an existing use or development (a certificate of lawful existing use or development) and a proposed use, to confirm in law that something is lawful.
Change of use applications, including regularising a use that changed without the right consent, for example on a commercial premises.
Regularising work that has departed from an approved planning permission, where the finished building no longer matches the drawings that were consented.
Retrospective work in designated areas, where permitted development rights are restricted or removed, such as a National Landscape (formerly an Area of Outstanding Natural Beauty) or a conservation area.
Listed buildings, combining retrospective planning permission with listed building consent, including for low-carbon features such as an air source heat pump or an electric vehicle (EV) charging point.
Prior approval applications, where that is the right route rather than a full planning application.
Measured surveys and detailed drawing packages, prepared to support either my own application or a planning consultant’s submission.

How I can help

Assess your situation honestly and tell you whether the work is likely to gain permission, or whether a certificate of lawfulness, a change of use application or another route is the better one.
Carry out a measured survey and prepare the drawings, plans and supporting statements the council needs to make a decision, presented to a standard that lets the application be read clearly.
Where work is already beyond the time limit for enforcement, apply for a lawful development certificate to confirm it is now lawful, rather than re-applying.
Deal with the case officer and the enforcement team on your behalf, and advise on the next options if an application is refused.
On complex cases, work alongside a planning consultant, so you have both the design and drawing expertise and dedicated planning advocacy behind your application.

I will give you a straight, honest view of the prospects before you commit, rather than make promises about the outcome that no planning application can offer. Much of my work comes through referrals and returning clients.

When you might need this

You have extended, converted or built something without planning permission.
You have had a planning enforcement notice, or a warning from the council’s planning enforcement team, and need to respond.
A use of a building or land changed without the right consent.
Your property is a listed building or sits in a conservation area, where work that would otherwise be permitted needs consent.
Work has affected, or sits close to, a tree protected by a tree preservation order (TPO).
The finished work has departed from the plans the council approved.
You are selling, and your solicitor or the buyer’s conveyancer has flagged work that has no planning permission or building regulations sign-off.

Time limits matter

There are limits on how long a council has to act on unauthorised work, and the rules in England changed in 2024. Whether your work is now immune from enforcement, and which route is right for it, depends on the detail of your case, so it is worth getting advice sooner rather than later.

This is a starting outline. I expand each enquiry with advice specific to your property and situation. If you are dealing with an enforcement notice or a sale that has stalled, get in touch as soon as you can.

Frequently asked questions (FAQ)

Can I get planning permission for something I have already built?

Often, yes. A retrospective application is assessed on the same planning merits as any other application, so the outcome depends on the work itself and the local planning policy. I will give you an honest view of the prospects before you commit.

When do I actually need retrospective planning permission?

You need it where permitted development rights do not apply or have been used up. That includes listed buildings, designated areas such as a conservation area or a National Landscape, a change of use, and work that has deviated from the plans the council approved. If you are not sure whether your work needed consent, I can check it for you.

What should I do if I have received an enforcement notice?

There are deadlines for responding to an enforcement notice, so it is worth getting advice quickly. I can review the notice, set out your options, and deal with the council’s enforcement team on your behalf.

What is a lawful development certificate?

It is a formal confirmation from the council that work or a use is lawful, usually because it sits within permitted development or is beyond the time limit for enforcement. In some cases it is a better route than a fresh application. There are two types, one for an existing use or development and one for a proposed one.

Can a planning consultant help on a complex case?

Yes. On complex cases I work alongside a planning consultant, who leads on the planning strategy and advocacy while I produce the survey and drawing package. For many enforcement and listed building cases that combination works well.