Downstairs toilets
added and renovated.
A downstairs toilet is one of the most-requested additions in London family houses — and one of the most valuable. We create cloakrooms under stairs, in hallways and utility rooms, and renovate existing ones: drainage, ventilation, compact sanitaryware and finishes under one quote.
What a downstairs toilet
really costs in London.
Renovating an existing downstairs toilet in London costs £2,000–£4,000 + VAT. Creating a new one under the stairs or in a hallway — building the enclosure, running supply and waste, ventilation and electrics, then fitting and finishing — costs £3,500–£6,500, more where drainage is difficult or the space needs structural work.
The cost drivers are the drainage route (a gravity connection to the soil stack or an external drain is ideal; a macerator is the fallback), the space (head height under stairs, door swing), ventilation routing, whether a basin needs a hot supply, and the finishes — a cloakroom is small enough to use bold tiles and wallpaper.
Tom Harvey Contractors provides free site visits and itemised written quotes within 48 hours, and we'll confirm the drainage route before you commit to anything.
Speak to the team today — free advice, no obligation
020 3983 5087What's included in our service:
- Drainage route assessed at the site visit
- Under-stairs and hallway enclosures built
- Stud walls, door and soundproofing
- Waste connection to soil stack or drain
- Macerator installation where needed
- Compact and short-projection WCs and basins
- Wall-hung WC with concealed cistern
- Extractor fan ducted to outside
- Lighting and heated towel rail
- Tiling, wallpaper and decoration
- Flooring
- 12-month workmanship warranty
Every cloakroom
clearly priced.
Real ranges from our London cloakroom work. Sanitaryware and tiles are supplied at trade prices or by you and shown as a separate line.
- Strip-out
- New WC and basin
- Retiled or half-tiled
- New extractor and lighting
- Decorated and floored
- Enclosure, door and soundproofing
- Supply, waste and ventilation
- Compact WC and basin
- Lighting and towel rail
- Tiled splashback and decoration
- Macerator if required
- Wall-hung WC and vanity
- Feature tiles or wallpaper
- Panelling and bespoke joinery
- Designer brassware
- Concealed lighting
- Layout changes and structural openings
Simple process.
No stress.
Every project follows the same clear process so you always know what's happening and when.
Contact Us
Call, email or submit online. Tell us about your downstairs toilet and what you want to achieve.
Free Site Visit
We visit, measure up and assess. No charge, no obligation.
Written Quote
Itemised written quote within 48 hours. Every line clearly priced.
The Work
Work starts on the agreed date. Done efficiently, cleanly and to the agreed spec.
Handover
Snagging cleared, 12-month warranty confirmed. Job done properly.
What makes us
different.
One contractor, every trade
We coordinate every trade ourselves. One contact, one quote, one handover — no juggling.
Fixed price, written quotes
Every quote is itemised and fixed. What we quote is what you pay — guaranteed. No mid-project surprises.
Fast and efficient
We work efficiently without cutting corners. Clear timelines agreed upfront at quote stage.
Supply and fit available
We source materials at trade prices — or we'll work with your chosen supplier. Both options available.
10+ years across London
1,000+ jobs completed. We've worked in everything from mansion flats to Victorian terraces and new-build towers.
Digital invoicing, VAT registered
Professional itemised quotes and VAT invoices — perfect for landlords, agents and property managers.
Covering
all of London.
We cover every London borough and Hertfordshire. Here are the areas we work in most regularly.
Don't see your area? Call us — we cover all of Greater London
020 3983 5087Your questions
answered.
Want to add a downstairs loo?
Free site visit across London · Written quote within 48 hours · No obligation
