Durham's peninsula is the neck of land inside the Wear's loop, with the cathedral and castle above the banks. It is a World Heritage Site, and the streets around it sit in conservation areas. Many buildings are listed. Many nearby houses are not. Our team will not point at a roof and declare a status. The deck, if there is to be one, starts with the address and the published rules, then with a frame that can dry in the shade of the bank.
The setting
The river, the woods and the height of the peninsula make gardens small, steep and overlooked. A deck here is seen from paths and from the opposite bank more often than a deck on an estate. We keep it low, close to the house, and quiet in colour. A tall platform competing with the view is the wrong object, even before the rules are opened.
The banks are shaded, and a frame that cannot dry will suffer. The ventilation guide applies with more force here. Where the garden falls, levels follow the Wear-bank guide.
We are talking about houses whose gardens feel this setting. We are not claiming a particular house is listed, and we are not offering work to the cathedral or the castle. If your house is one of the many ordinary homes on the approaches, the checks still come first, because the designation often extends further than the obvious monument.
What the rules actually say
For an ordinary house outside any designation, a deck no more than 30 cm above the ground, covering no more than half the garden with other buildings, and not forward of the front wall, is normally permitted development. Flats and many converted buildings are outside that allowance from the start.
Conservation areas are Article 2(3) land. On that land the Planning Portal says no decking is permitted development to either side of the house. The back may still be possible if height and area comply. The side return, common on these tight plots, is not a place to assume permission. The national conservation-area dataset shows the boundary. We look up the address. Being near the peninsula is not the same thing as being inside the line, and being inside the line is not something we guess.
Within the curtilage of a listed building, no decking is permitted development, visible from the river or not. We will not assume an old house has the allowance, and we will not invent a listing the register does not contain.
The World Heritage Site has a further limit in the Planning Portal note: on that land, the area of decking or outbuildings more than 20 metres from the house is limited. We measure that distance rather than waving at the cathedral. Some houses are clearly within the site. Some sit near a boundary that has to be read properly. The address decides.
Building quietly
If a deck is allowed, it stays low, with a ventilated void and no skirt sealed against old masonry. Air bricks stay clear. We do not fix the frame into historic stone. Footings stand on ground we have opened, with the BGS viewer as the map rather than a guess.
The flood map for planning is read for the postcode. Gardens high on the bank and gardens down by the water are not the same, and we will not quote a zone from the view. Steps take any difference between a low deck and the door. Raising the deck to a high sill can break the 30 cm test and can make the platform more visible than the street can bear.
Split levels are possible where the bank falls and each part stays low to the ground beside it. They are not a way to build a grandstand. Split-level decks describes the frame. On the peninsula the first question is still whether that frame is allowed at all.
Before we draw it
Tell us the postcode and the street character: tight yard, bank down to trees, or a house you have been told is listed. If you have been told nothing, that is normal. We check conservation-area boundaries, listed status and the World Heritage constraint for that address, and we tell you what we find in plain words. If the answer is that permitted development does not apply, we stop the design there until you have spoken to the council.
Ask for a quote when you want that check and a visit. The quote, if we can build, will describe a low, ventilated deck and nothing theatrical. If we should not build, we will say that too. The peninsula does not need another platform shouting across the river.
FAQ
Is my house listed because it faces the cathedral?
Not necessarily. Many houses nearby are listed and many are not. The register for the address is the answer, not the view.
Can we put a deck down the side?
In a conservation area, no, not as permitted development. The side is specifically restricted. The back is the place to test against height and area.
Do World Heritage rules ban decks?
They add limits, including on area well away from the house. They are read with the conservation-area and listed-building rules, for the specific address.
Will the deck damage an old wall?
We keep the frame off the wall, clear of air bricks, on its own footings, with air moving underneath. We do not fix the deck into historic masonry to hide the edge.