- Postcode districts
- AL7, AL8
- Nearby
- Hatfield, Hertford and St Albans
- Guide price
- £4,800–£9,500
- Typical time on site
- 4–8 working days
- Water
- Very hard across most of Hertfordshire
- Survey
- Free, at your home
What does an en-suite cost in Welwyn Garden City?
Our guide price for an en-suite in Welwyn Garden City is £4,800–£9,500 including VAT. Prices in East of England run at about 6% above the national guide, mainly because of labour rates. The figure depends on the size of the room, whether anything moves, and the products you pick.
Refit
- Existing en-suite, same layout
Upgrade
- Fitted furniture with storage
New en-suite
- Ventilation and electrics to regulations
Guide prices for Welwyn Garden City including VAT. Your itemised written quote after the free survey is the price that counts.
Working in Welwyn Garden City
We cover every part of Welwyn Garden City, including AL7 and AL8, and nearby Hatfield (2.8 miles) and Hertford (5.5 miles).
In Welwyn Garden City, as anywhere, the age of the house decides a lot: pipe sizes, floor construction and where the soil stack runs. If your Welwyn Garden City en-suite fan just blows into the loft, we can duct it properly to outside as part of the refit. If your Welwyn Garden City home has one bathroom and a good-sized main bedroom, an en-suite is often the change that eases the morning queue.
Water across much of Hertfordshire is very hard. If your supply in Welwyn Garden City is the same, limescale on shower glass and heads is a real issue: easy-clean glass, rub-clean nozzles and a squeegee make a big difference. Hardness varies street by street, so check the figure for your postcode with your water supplier.
What the job includes
- A survey that traces the route from the en-suite to the soil stack and checks the fall the waste pipes would need
- A shower tray or level-access former, an enclosure or walk-in panel, and a thermostatic valve
- IP-rated lighting, a shaver socket and the electrics done by a qualified electrician, tested and certified
- An extractor fan ducted to outside, sized to the room and wired with an overrun timer or humidistat
Decisions to make first
Refit or new en-suite
A refit keeps the existing drainage and walls. A new en-suite costs more because the walls, waste route, fan duct and electrics all start from nothing.
Door type
An outward-opening door frees floor space inside. A sliding pocket door saves space on both sides but needs a stud wall long enough to take the cassette.
Rules that apply in England
In England, a new en-suite brings in Part H for the new connection to the soil stack, Approved Document F for ventilation, at 15 litres per second intermittent or 8 litres per second continuous extract, and Part P for the new circuits. The electrician should be registered with a competent person scheme, or the work notified to building control. On a refit, avoid replacing the fan with a less effective one.

