Bathroom fitting in Dulwich: en-suites, wet rooms and period bathrooms in SE21 and SE22

A bathroom in a Victorian house off Lordship Lane is rarely a straightforward swap of old suite for new. Pull up the old vinyl and you often find a solid timber floor that bounces, a soil pipe boxed into a chimney breast, and lath-and-plaster walls behind the tiles that will not hold a heavy mirror cabinet, let alone a wall-hung pan. Bathroom fitting in Dulwich means working with the house you actually have, not the show-flat the brochure photos were shot in. The SE21 villas and the SE22 terraces around East Dulwich were built long before anyone planned for a second bathroom, an en-suite or a walk-in shower, and the building fabric has opinions about all three.

I run All Well Property Services and we fit bathrooms across Dulwich. Most of what goes wrong on a period bathroom comes back to two things: water finding a way out where it was never stopped, and electrics or gas that were never certified. Get those right and the tiling and the taps are the easy part.

The four jobs people call them all "a bathroom"

The word covers very different work, and the type drives nearly every decision that follows.

A family bathroom is the full strip and rebuild of the main bathroom, usually keeping the room where it is. The constraints are the existing soil stack and the floor structure.

An en-suite is a new room, often carved out of a bedroom corner or a landing, which means new soil and waste runs and sometimes a macerator where gravity drainage will not reach. On a Dulwich house the position of the existing stack decides whether an en-suite is simple or a real piece of plumbing.

A wet room removes the tray and the enclosure and tanks the whole floor and lower walls, so the floor itself becomes the shower. It is the type with the least margin for error on waterproofing, and on a suspended timber floor it is the one that needs the most thought.

A period restoration keeps the character of the room: a roll-top bath, original or reclaimed fittings, traditional tiling, while bringing the plumbing and electrics up to current standard behind the scenes. This is common in the SE21 villas where the room is part of the house's character and a chrome pod would look wrong.

Waterproofing is the part you cannot see and cannot skip

The single biggest difference between a bathroom that lasts and one that leaks into the room below is what happens before the tiles go on. Tiles and grout are not waterproof. Water gets through grout lines and around the edges of trays, and on a period house the place it lands is a ceiling lath below.

For a standard bathroom that means sealing the joints, the floor-to-wall junctions and the pipe penetrations properly. For a wet room it means tanking: a continuous waterproof membrane across the whole floor and up the walls in the shower zone, bonded so there is no break at the corners where movement happens. On the suspended timber floors common in Dulwich terraces, the floor flexes, and a rigid build over a flexing floor cracks. We use a decoupling layer and a tray former that is built for timber rather than assuming a concrete slab, then fall the floor to the drain so water goes where it should.

This is also where corners get cut on cheaper jobs, because none of it shows once the tiles are down. It shows eighteen months later as a stain on the kitchen ceiling.

Period-house plumbing realities in SE21 and SE22

A pre-1919 Dulwich house was not designed around the bathroom you want, so most of the work is making the new layout fit the old fabric.

Solid brick walls, not cavity, mean wall-hung pans and concealed cisterns need a proper frame fixed back to something solid, not a quick plug into soft Victorian brick or old plaster. Suspended timber floors flex and carry sound, so they often need strengthening before heavy stone tiling or a wet-room build, and pipe runs have to be notched without weakening the joists. Soil stacks are frequently in awkward positions, sometimes original cast iron, which sets where a toilet can sensibly go and whether an en-suite needs a pumped solution.

Water pressure is the other one. Many of these houses still have a cold tank in the loft and a gravity-fed system, which a modern high-flow shower will disappoint you with. Part of the design conversation is whether the system can drive the shower you have chosen or whether the heating and hot-water setup needs to change to suit. That decision sits with the boiler and the pipework, not the showerhead.

Certification: the part that protects you when you sell

Two trades in a bathroom are notifiable, and both leave a paper trail a buyer's solicitor will ask for.

Electrics in a bathroom fall under Part P of the Building Regulations because of the obvious risk of water near power. New circuits, a shower pump, an electric shower, extractor fan wiring and the lighting all need to be installed and certified by a competent electrician, with the right protection and the right zones around the bath and shower observed. All Well Property Services is NICEIC approved, so the electrical work is signed off and you get the certificate, rather than a cash-in-hand job that surfaces as a problem at conveyancing.

If the bathroom work touches the boiler, the hot-water system or any gas appliance, that is Gas Safe work by law. All Well Property Services is Gas Safe registered, so a boiler relocation or a system change to feed a new shower is done and documented correctly.

Keep those certificates with the house papers. When you sell, they are the difference between a smooth answer and an awkward one.

How All Well Property Services handles a Dulwich bathroom

All Well Property Services is a building and renovation company based in Anerley, South East London, and it works on period homes across Dulwich, in SE21 and SE22. All Well Property Services is NICEIC approved, Gas Safe registered, FENSA registered and CHAS accredited, and it is registered at Companies House under number 12721034. All Well Property Services has fitted bathrooms in these houses since 2020, and runs each project through a single project manager so one person owns the plumbing, the electrics, the waterproofing and the tiling, instead of a chain of subcontractors each blaming the last.

In practice that means we survey the room before quoting anything: where the stack is, what the floor is doing, what the water pressure will actually give you, and what the walls will hold. We design the layout around those realities, tank and waterproof properly for the type of bathroom you want, and certify the electrics and any gas work so it is all signed off. If your bathroom plan is part of a wider project, it joins up with the rest of the work rather than being treated as a separate trade that turns up at the end.

One note specific to Dulwich. A new bathroom inside the house does not usually change the external appearance, so it sits outside the Dulwich Estate Scheme of Management. But if the work involves a new soil or vent pipe on an outside wall, an external extractor outlet, or a small extension to make room, and your house is on the Estate, that external change needs the Estate's written approval as well as anything the council requires. We check that at the survey so it does not surprise you partway through.

Book a free site visit

If you are planning an en-suite, a wet room, a new family bathroom or a careful period restoration in SE21 or SE22, the honest first step is to look at the actual room: the stack, the floor, the pressure and the walls. All Well Property Services offers a free site visit, and on it I will tell you what the house will allow, where the real work is, and how to get a bathroom that stays dry and stays certified. Get in touch and we will arrange a time.