Bedroom & En-suite

Loft Bedroom with En-suite

A loft bedroom and en-suite bathroom combined — the most popular use of loft conversion space. Compare up to 3 free quotes — no obligation.

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Loft Bedroom with En-suite

Adding a loft bedroom with an en-suite is the most popular outcome of a loft conversion project — creating a private master suite at the top of the house. The bathroom element requires careful planning for waste runs, ventilation and waterproofing within the roof structure.

The en-suite specification can range from a simple shower room to a full bathroom with bath, shower and twin basins. Getting 3 quotes with a clear en-suite specification ensures you compare like-for-like.

What’s involved

✓ Planning the waste and water supply runs to the en-suite within the roof structure
✓ Waterproofing (tanking) of the shower or wet area walls and floor
✓ First fix plumbing and mechanical ventilation for the en-suite
✓ Tiling, suite fitting (WC, basin, shower/bath) and second fix plumbing
✓ Bedroom finishing: insulation, plastering, flooring, built-in storage design and decoration

Typical costs

Typically included in the dormer or conversion cost, plus £8,000–£20,000 for the en-suite fit-out depending on specification.

Prices vary by region, subfloor condition and product choice. Compare 3 quotes for the most accurate price for your specific job.

FAQs — Loft Bedroom with En-suite

Can I add an en-suite in any loft conversion?

Yes — an en-suite can be incorporated in most dormer, hip-to-gable, mansard and L-shaped conversions where there is sufficient floor area. A minimum footprint of approximately 1.5m × 2.0m is needed for a compact shower room.

Where does the en-suite waste go?

Waste pipes from a loft en-suite connect to the main soil stack, usually via a vertical run down through the house. The route depends on the property's existing plumbing layout. Your specialist will plan the route at survey stage.

Do I need mechanical ventilation in a loft en-suite?

Yes — building regulations require mechanical extraction in bathrooms without an opening window. An extractor fan on a humidistat is the standard solution in loft en-suites.

What is a good en-suite specification for a loft?

A walk-in shower, wall-hung WC and basin are the most space-efficient choices for a compact loft en-suite. A heated towel rail is a popular addition. Full bath in a loft en-suite is possible but requires sufficient floor area and careful structural assessment.

Will adding an en-suite significantly increase the conversion cost?

Yes — an en-suite adds £8,000–£20,000 to the project cost depending on specification. This is almost always considered worthwhile given the lifestyle benefit and value it adds to the property.

What customers say

★★★★★ 4.9 / 5 from verified customers

★★★★★

“We had a rear dormer conversion done last summer — extra bedroom and en-suite for our teenage daughter. Got three quotes through this site, saved around £4,000 compared to the first firm we spoke to. The specialist handled planning permission and building regs start to finish. Highly recommend.”

Sarah M. Surrey

★★★★★

“Hip-to-gable conversion on our 1930s semi. I was nervous about the planning application but the specialist I found here had done dozens in our street and knew exactly what to submit. Project came in on time at 10 weeks. The new master bedroom is brilliant.”

James R. Leeds

★★★★★

“L-shaped dormer on our Victorian terrace — created two rooms and a bathroom from what was a completely unusable loft. The comparison process gave me confidence I was paying a fair price. Building control sign-off came through with no issues. Absolutely transformed the house.”

Helen T. Manchester