En-suite installation in Bromley means creating a new shower room off a bedroom, and a cloakroom means a new downstairs toilet, often under the stairs. Both depend on getting waste to the soil stack, ventilation without a window, and Building Regulations sign-off. Our free referral introduces a vetted local fitter to survey and quote.
Where an En-Suite or Cloakroom Fits in Bromley Homes
An en-suite usually takes space from a large bedroom, a box room, a loft conversion or a landing. A cloakroom usually goes under the stairs, in a hallway or off a utility room. The deciding factor in every case is the route to the soil stack; the second is whether a door and a person fit without a squeeze.
| Location | Typical Bromley home | Waste route | Watch points |
|---|---|---|---|
| Corner of a large bedroom | Victorian and Edwardian houses in Beckenham, Bickley, Shortlands | Often near an existing bathroom or the stack | Original features, floor joists, door swing |
| Loft conversion | Interwar semis in West Wickham, Petts Wood, Hayes | Down to the stack through the floor or a boxed duct | Headroom, rooflight or dormer consent in Article 4 areas |
| Under the stairs | Most house types | Ground-floor connection to the drain | Headroom over the toilet, a door that opens outward |
| Rear addition | Victorian terraces in Penge | Short run to an external stack or gully | Damp, single-skin walls, insulation |
There’s no single legal minimum size for a domestic en-suite or cloakroom. In practice a shower, toilet and basin fit in around 1.5 m by 1.2 m if the layout is tight, and a cloakroom with a compact basin fits in roughly 0.8 m by 1.4 m, with the door opening outward.
When a Macerator Makes Sense, and When It Doesn’t
A macerator pumps toilet waste through small-bore pipe to the stack, which lets you put a toilet where gravity drainage can’t reach. It solves the problem when the room is far from the stack or below drain level. The trade-offs are noise, a need for power, more maintenance, and that a blockage or failure takes the toilet out of use.
A fitter should look for a gravity connection first. Where the stack is reachable with a proper fall, a conventional connection costs less to run and never needs a service. Where it isn’t, a macerator is a fair solution, provided it’s sized for the toilet, basin and shower that share it.
En-Suite Installation in Bromley, Step by Step
A new en-suite runs from survey to sign-off: agree the position and waste route, build or adapt the partition, run new supply, waste and electrics, fit the extractor, board and tank the wet area, tile, fit the suite, then test and notify building control. Allow two to three weeks on site for a new en-suite, less for a cloakroom.
- Survey: waste route to the stack, water pressure, headroom, door position and where an extractor can vent outside.
- Design: layout drawn with the shower under the highest ceiling in a loft, the toilet nearest the stack, and the basin where the door allows.
- Structure: stud partition built, floor checked for strength, joists notched only where allowed.
- First fix: supply pipes, waste at the correct fall, and cables for lighting, fan and any shaver socket.
- Ventilation: extractor fan ducted to the outside, as a new bathroom without an opening window must have.
- Boarding, tanking and tiling: cement board and a membrane in the shower area, then tiles and silicone.
- Second fix and testing: suite, valve, screen, towel rail and lights fitted; drainage and pressure tested.
- Building control: the new bathroom is notified and signed off.
Want the layout planned first? See bathroom design. Ready for a survey? Call 020 7946 0123.
Loft En-Suites and Article 4 Streets Across Bromley
Loft en-suites are the most common new bathrooms in the borough’s interwar semis, where more than seven in ten homes in West Wickham, Petts Wood and Hayes date from between the wars. The waste route down to the stack and the headroom over the shower decide the layout. In Article 4 areas, a dormer or rooflight may need planning permission.
- Petts Wood Area of Special Residential Character: an Article 4 direction protects front roof lines, so a dormer or rooflight facing the road may need consent.
- Park Langley and Bickley: further Article 4 directions apply; check the direction’s wording before agreeing roof changes.
- Conservation areas: Bromley has 47. A new external soil pipe or vent on a front or side wall may need consent.
Bromley’s hard water is the practical footnote: an en-suite shower valve and head will scale up quickly, so choose fittings that are easy to descale.
Regulations for a New En-Suite or Cloakroom in the London Borough of Bromley
A new bathroom or toilet is controlled work under the Building Regulations because it adds sanitation, drainage, ventilation and electrics. Building control must be notified, either through Bromley Council or a competent person scheme for the relevant trades. The electrics are notifiable under Part P, the extractor must meet Part F, and the drainage Part H.
- Part G (sanitation): a new bathroom or WC must have suitable sanitary fittings and a wash basin, and hot water to a bath must be limited to 48°C. Approved Document G
- Part H (drainage): new foul drainage must be designed with the right falls and connections. Approved Document H
- Part F (ventilation): a new bathroom or WC needs mechanical extract; a WC-only room needs less than a shower room. Approved Document F
- Part P (electrics): lighting, fans and shaver sockets in a room with a shower are notifiable. GOV.UK: building regulations approval
- Toilets off kitchens: current regulations don’t require a lobby between a kitchen and a WC, but a basin in the WC and good ventilation are expected.
Comparing En-Suite and Cloakroom Quotes in Bromley
Compare quotes on the waste route and the building control route. Each should say whether the toilet connects by gravity or a macerator, where the extractor vents, who builds the partition, who does the electrics, and who notifies building control. A quote that only prices the suite and the tiling hasn’t dealt with the parts that make a new room legal.
- Gravity connection to the stack, or a macerator, and why
- Extractor route to the outside
- Partition, door and any floor strengthening included
- Electrics priced and certified under Part P
- Who notifies building control, and is the fee included
- Workmanship guarantee, in writing
What a new en-suite or cloakroom typically costs is in our bathroom costs guide.
En-Suite and Cloakroom Questions from Bromley Homeowners
Can I add an en-suite to any bedroom?
Most, if the waste can reach the soil stack with a proper fall or a macerator is acceptable, and the room can be ventilated. The survey confirms both before anything is priced.
Do I need building regulations approval for an en-suite?
Yes. A new bathroom involves controlled drainage, ventilation and electrics, so building control must be notified and the work signed off.
How small can a downstairs toilet be?
There’s no legal minimum. A toilet and compact basin fit in roughly 0.8 m by 1.4 m, with headroom over the toilet and a door that opens outward.
Who do I need for an en-suite: a plumber, builder or bathroom fitter?
A bathroom fitter who coordinates the trades is simplest: the partition and carpentry, the plumbing and drainage, the electrics and the tiling. Separate trades cost less on paper but you manage the sequence and the building control notification yourself.
Is a macerator noisy?
It runs for a few seconds after each flush and is audible through a partition. Siting it behind a boxed toilet and away from bedrooms keeps it manageable.
Last reviewed: 1 October 2026.