Bathroom Renovation Mill Hill

GS Renovation fits bathrooms, en suites and wet rooms throughout Mill Hill, in houses where the family bathroom is often the original one and the bedrooms are generous enough to take an en suite. We handle the drainage, the tanking, the ventilation and the tiling as one job, with our founder's 30+ years of hands-on experience behind it.

In Mill Hill, a full bathroom refit typically costs £6,000 to £20,000 or more (indicative London ranges, MyBuilder and Checkatrade, 2026). GS Renovation Ltd, a building contractor based in Potters Bar, does the work in Mill Hill: we carry the tanking, plumbing and tiling as one contract, with the electrics certified by a registered electrician.

How the job runs

1. Free design visit at your Mill Hill home and an itemised quote.
2. Strip-out, then first-fix plumbing and electrics.
3. Tanking to the wet areas, then tiling.
4. Sanitaryware and second fix, with notifiable electrics certified by a registered electrician. Typically 10 to 15 working days on site.

En suites and drainage in Mill Hill houses

The bedrooms in these houses will usually take an en suite; the real question is where the waste goes. Gravity beats a pump every time, so we plan the route to the existing soil stack first, keeping the fall correct and the run short, because a 40mm waste pipe can only travel so far at the right gradient before it needs a vent or a larger diameter. A macerator is a last resort rather than a starting point, since it needs power, servicing and an outlet that nobody will ever block.

In a wide detached house the stack can sit a long way from the bedroom you want to use, which sometimes means a new soil stack or a boxed vertical run through a cupboard. That is worth designing before you commit to a layout, not after the sanitaryware is chosen. Head height and joist direction matter as well, because there are limits on where a floor joist may be notched or drilled, and a pipe run cut through the wrong part of a joist quietly weakens the floor above.

Housing in Mill Hill

The stock in Mill Hill runs to roughly 10,980 dwellings, 44% of them flats and 56% houses, built 10% before 1919, 38% between 1919 and 1939 and 52% after 1945. With 24% of homes terraced, a terrace bathroom in Mill Hill vents front, back or up, never into a party wall.

A bathroom above another household in a Mill Hill flat

44% of homes in Mill Hill are flats, and in a flat the bathroom floor is also somebody else's ceiling. A leak that a house owner would find in their own kitchen shows up next door first, and the lease can make you answerable for it. So the waterproofing in a flat bathroom covers the whole floor, not only the shower area, and is turned up the walls at the edges. The waste connection to the shared soil stack is made with access left for rodding, because a blockage in that stack affects every flat that drains into it.

Sound is the other neighbour issue. Replacing carpet or vinyl with tiles laid straight onto a timber or concrete floor sends footsteps and dropped objects into the flat below, and some leases forbid hard floors without an acoustic layer. A resilient mat under the tile bed, with the bath and toilet fixings isolated from the structure, deals with it at source. Before a Mill Hill flat bathroom is stripped, tell the owner below when the noisy work is planned, and with their agreement photograph their ceiling from their side, so any later crack is not argued over.

Tanking, ventilation and the electrics

A bathroom fails from behind the tiles. We tank the wet zones onto a sound substrate before any tiling starts, form the falls properly in a wet room, and use a decoupling layer where the floor is timber and will move a little with the seasons. Ventilation is the other half of it. An intermittent extract fan has to shift enough air to clear the moisture and must be ducted outside in rigid pipe over the shortest run available, not left venting into a loft where the moisture simply lands somewhere else.

Bathroom electrics are zoned, so fittings have to suit the zone they sit in and the circuits need the right protection. New circuits, and circuit changes in those zones, are notifiable under Part P, so a registered electrician certifies them or they are notified to building control as part of the job. Underfloor heating goes down over insulation rather than straight onto a cold slab, otherwise you spend the winter gently warming the ground beneath your house. Where a Mill Hill property sits high with weak mains pressure, we check flow rates before anyone specifies a large rainfall shower head.

• Full plumbing, drainage and waterproofing (tanking)
• En-suite creation in bedrooms and loft rooms
• Complete bathroom design and planning

VOA Council Tax stock of properties, March 2025, for Mill Hill Broadway, Mill Hill East and Mill Hill Park. Counts rounded by the VOA.

Work in Mill Hill rarely sits on its own, so you may also want chimney breast removal in Mill Hill, bathroom renovation across Barnet, bathroom fitting in London, how we handle bathroom renovation across London and Adding a Downstairs Toilet.

Why Choose GS Renovation in Mill Hill

The parts of a bathroom that fail are the parts you cannot see: the tanking, the fall on the waste, the fan that was never actually ducted outside. We get those right first, then tile. One team handles the plumbing, the notifiable electrics, the waterproofing and the finish, so nobody is left waiting on a trade who is not coming back. Our founder's 30+ years of hands-on experience.

Checked by Abdelaaziz Saaid, founder and director of GS Renovation Ltd (Companies House no. 14611254). Structural design is by the consulting engineer appointed to your project.