Planning permission in Dulwich: Southwark's rules, permitted development, and where Estate consent sits on top

A homeowner off Lordship Lane once asked me whether her side return needed planning permission, because a neighbour had built almost the same thing without any. She did, the neighbour had used permitted development, and both of them still had a second approval to deal with that neither had mentioned. That gap is the thing most people miss. Planning permission in Dulwich is one process. Dulwich Estate consent is another, and on much of the Estate land you need both.

I run All Well Property Services and we work on Dulwich houses across SE21 and SE22 regularly. The two-track approval system here is not complicated once you see it laid out, but it catches people who assume the council is the only body they answer to. Here is how the planning side works, what permitted development actually covers, and where the Estate sits on top of all of it.

Which authority your planning permission in Dulwich goes through

The first thing to pin down is which council you deal with. Dulwich is not one borough. Most of it falls under the London Borough of Southwark, but parts sit under Lambeth or Lewisham depending on the street. Your planning application, and your Building Control, go to whichever authority your address falls in.

This matters more than it sounds. The three boroughs publish their own local plans and supplementary guidance, and an extension or loft that one would pass can be assessed differently by another. So before any design work, the first job is confirming your authority. If you are near a boundary, do not assume your road and your neighbour's road are governed by the same council.

Building Control is separate again. That is the body that signs off the work as structurally sound and compliant, and it is either the council's own service or an approved inspector. Planning decides whether you can build it. Building Control decides whether you built it properly. They are different sign-offs, and you need both.

What permitted development covers, and what it does not

A lot of work on a Dulwich house does not need a full planning application at all. Permitted development rights let you carry out certain works within set limits without applying for permission. For a typical house that can include some rear extensions within depth limits, a loft conversion within volume limits, and various smaller alterations.

The volume limits are the ones people quote at me most. A loft conversion under permitted development is capped at 40 cubic metres of added space on a terraced house and 50 cubic metres on a semi or detached. Go past that, add a dormer to a front roof slope, or sit in a designated area where rights are restricted, and you are back to a full application.

That last point is the catch in Dulwich. Permitted development rights are reduced in conservation areas, and Dulwich Village is a conservation area. Front-facing changes, side extensions and cladding that would be permitted elsewhere often need permission here. Some streets also carry an Article 4 direction that removes permitted development rights for specific works. The safe assumption on a period Dulwich house is that less is permitted than the headline rights suggest, and you confirm it rather than presume it.

If your project does fall within permitted development, get a Lawful Development Certificate from the council. That is a formal confirmation that the work is lawful, and it is the document a buyer's solicitor will ask for years later. It is not the same as planning permission, but it protects you in the same way a permission would.

Where Dulwich Estate consent sits on top

Now the part that trips up almost everyone. Much of Dulwich, across SE21 and parts of SE22 and SE24, sits on freehold land managed by the Dulwich Estate, a charity that runs a Scheme of Management from its office at The Old College, Gallery Road, SE21 7AE. If your house is on Estate land, you need the Scheme of Management Office's written approval before any work that changes the external appearance of the property.

This is a separate consent, and it is in addition to your council's planning permission. The two are not connected. The council assesses against planning policy. The Estate assesses against its own Guidelines for Residents to protect the character of the area. Getting one does not get you the other, and the two bodies do not talk to each other on your behalf.

The works that need Estate approval are broader than people expect: extensions and loft conversions, replacement doors and windows, repairs to roofs, chimneys and walls, conservatories, hard standings, boundary changes, solar panels, EV charging points, satellite dishes, garden structures, swimming pools, change of use and new build. If it changes how the house looks from the street, it almost certainly needs the Estate's written approval first.

The two tracks are not connected

Here is the consequence that lands homeowners in trouble, and it is worth reading twice.

Work that needs no planning permission at all, because it falls under permitted development, can still need Estate approval if it changes the outside of the house. Permitted development rights do not override the Scheme of Management. So the answer to "do I even need permission?" can be "not from the council, but yes from the Estate."

And the reverse trap is just as common. Full planning permission from Southwark is not a green light to start. If you build on Estate land without the Scheme of Management Office's approval, you are in breach of the Scheme, and the Estate enforces breaches. I have seen people with valid council permission told to stop, because they treated the planning decision as the finish line when it was only half the approval.

So you plan for two tracks from the start. One application to the council, or a Lawful Development Certificate if the work is permitted. A separate application to the Scheme of Management Office. The Estate publishes its current fees and an annual charge, and you build the Estate application into the programme alongside the council's so the two run in parallel rather than one after the other. My sibling post on the Dulwich Estate Scheme of Management goes through that side in full detail.

How All Well Property Services handles both tracks

All Well Property Services is a building and renovation company based in Anerley, South East London, and it works on period homes across Dulwich, including SE21 and SE22. All Well Property Services has operated since 2020, is NICEIC approved, FENSA registered, CHAS accredited and Gas Safe registered, and is registered at Companies House under number 12721034. All Well Property Services runs each project through a single project manager, so one person coordinates the council, the Estate office and the build rather than leaving you to chase three sets of approvals.

In practice that means we confirm your authority and whether you are inside the Scheme before any design work starts. We work out whether the project is permitted development or needs a full application, and whether a Lawful Development Certificate is the right protection. Then we prepare the council submission and the Estate application so they move together. Designing to both the planning policy and the Estate's Guidelines from day one is what stops a project going through two rounds of drawings.

Find out where you stand before you spend on plans

If you are weighing up an extension, a loft conversion or new windows on a Dulwich house and you are not sure which council you fall under, whether the work is permitted development, or whether the Estate has a say, that is exactly what we sort out on a free site visit. We will tell you which approvals your project actually needs and what each body is likely to accept, before you spend a penny on plans. Book a free site visit and we will walk the house with you.