New en-suite design and installation
New en-suites designed around the room, the plumbing and the property.
We create private shower rooms and en-suites for bedrooms, loft rooms, family homes, landlords and HMOs. We do not just draw an en-suite into a bedroom — we work out how it can actually be built, drained, ventilated, supplied, waterproofed and finished properly.
What is an en-suite?
An en-suite is a private bathroom or shower room accessed directly from a bedroom. It can be a compact shower, basin and WC layout, a larger master bedroom en-suite, or a practical private bathroom for a guest room, loft room, rental room or HMO bedroom.
Creating one is different from renovating an existing bathroom. You are often forming a new room inside an existing room, which means walls, doors, drainage, water supply, ventilation, electrics, waterproofing, floor levels, access and the feel of the bedroom all need to be thought through properly.
The bedroom still needs to feel usable, balanced and comfortable after the new en-suite is formed.
The soil pipe and waste routes often decide where the en-suite can realistically go.
A new shower room needs a proper extract route to control moisture and odours.
The design needs to work as a real build, not just look neat on a drawing.
Designed with building knowledge from the start
Years of renovating houses teaches you to see space differently. A good en-suite should feel like it was always meant to be there — not squeezed into a corner as an afterthought.
With over 25 years of hands-on building, plumbing and bathroom experience, we look at how the en-suite will actually be formed, drained, ventilated, supplied, waterproofed and finished before the design is agreed.
Can your room take one?
A badly planned en-suite can make a bedroom feel cramped, create drainage problems, cause damp issues or become awkward to maintain. The design has to work on paper and in the real property.
Is there enough room left for the bed, wardrobes, circulation space and the bedroom to still feel like a proper room?
Can the WC connect to a suitable soil pipe or drainage route without creating ugly or impractical pipework?
Can the shower and basin wastes run with the correct fall, and can the floor build-up handle the tray and waste position?
Will the existing hot and cold water supply perform properly with the shower and fittings being considered?
Can the new shower room be ventilated properly to outside through a wall, ceiling void, roof route or suitable duct run?
Where will the door go, how will the space feel, and can the en-suite be made private without spoiling the bedroom?
How is an en-suite built?
A new en-suite usually involves much more than installing a shower, toilet and basin. It can involve forming new walls, creating a doorway, routing pipework, installing ventilation, waterproofing the wet areas, preparing the floors and coordinating several trades in the correct order.
This is why the survey and design stage matters. The better the route is planned before work begins, the fewer surprises there should be once the room is opened up.
We look at the room, nearby bathrooms, outside walls, soil pipe positions, floor structure, ceiling voids, ventilation options and access routes.
The shower, toilet and basin need to be positioned around drainage, clearances, door swings, privacy, pipe routes and how the bedroom will still work afterwards.
This may involve stud walls, a new doorway, sound/privacy considerations, boxing, floor preparation and making the new enclosure feel part of the room.
Hot and cold water, wastes, soil connection, extractor fan, lighting, mirror points and electrical zones need to be planned and installed properly.
The wet areas need correct preparation, tanking where needed, tile setting, trims, sealing and finish details so the en-suite looks good and performs properly.
Cost guide
A new en-suite is usually far cheaper and less disruptive than building an extension, but it is still a proper building project. You are creating a new room with drainage, water supply, ventilation, electrics, walls, waterproofing, tiling, fittings and finishing.
As a broad guide, a properly planned new en-suite conversion in London will often start from around £12,000–£18,000+, with more complex, awkward or higher-spec projects costing more. A proper figure can only be given after the room and property have been assessed.
Ask About Your RoomThe further or harder the route to the soil pipe, the more planning and work may be needed.
Studwork, doors, boxing, making good and privacy details all affect the scope.
Tile choice, shower type, vanity, brassware and finish level can move the budget up or down.
Ventilation, electrics, hot water and pressure requirements all affect the correct route.
Family homes
In family homes, an extra en-suite can make daily life easier. It can reduce morning queues, give a main bedroom more privacy, make guest rooms more comfortable and help a loft or spare room feel more complete.
The key is not just adding a shower room anywhere. It needs to improve the home without damaging the bedroom layout, blocking natural light, creating awkward access or making the room feel cramped.
Master bedrooms
A private bathroom that makes the main bedroom feel more complete.
Guest rooms
Better privacy and comfort for family, visitors or older relatives.
Loft rooms
A practical addition where drainage, head height and ventilation allow.
Growing families
Less pressure on the main bathroom and better use of available space.
For landlords, the design should be judged by rental appeal, durability, maintenance and whether the extra en-suite makes financial sense.
Landlord and HMO en-suites
For HMO and rental properties, the best en-suite is usually not the most expensive one. It is the one that is compact, compliant, easy to clean, simple to maintain and durable enough for daily tenant use.
An en-suite can improve tenant appeal and reduce pressure on shared bathrooms, but the room size, local amenity standards, licensing requirements, specification and total project cost all need to be checked before deciding if the investment makes sense.
Value, rent and property appeal
A well-planned extra bathroom can improve how a property is used, how a room is marketed and how attractive the home feels to buyers or tenants.
8%
Nationwide / The Mortgage Works research suggests adding an extra bathroom can boost buy-to-let property value by around 8%.
6%
The same research linked a second bathroom with a rental premium of around 6%, subject to property type and market conditions.
?
The exact uplift depends on location, room size, demand, specification, licensing, total project cost and whether the en-suite improves the property.
These figures are general market guidance only, not a valuation or rental guarantee. Results depend on property type, room size, location, layout, specification, market conditions and whether the en-suite improves the property without damaging the bedroom.
From idea to clear scope
You may already have an idea of where the en-suite could go, or you may simply know that you want an extra private bathroom somewhere in the property. We can sit down with you in our Fulham consultation space or at your home and go through the options on a large presentation tablet.
Where useful, we can prepare more than one design direction so you can compare layouts, finishes, product levels and practical routes. Once the direction is agreed, we provide a clear quotation and scope of works so the project is not left vague.
See layouts, ideas and options clearly before committing to the route.
Compare different layouts or finishes where the room has more than one possible direction.
Understand what is included, what is excluded and what the proposed build route is.
For most projects, a WhatsApp group can keep updates, photos and decisions in one place.
Managed installation
A clear process helps establish whether the en-suite is possible, what it should cost, what regulations matter and what design route makes sense.
Tell us where you want the en-suite, what the room is used for and whether it is for a private home, rental property or HMO.
We assess the room, drainage, ventilation, pressure, flow rate, floor levels, access and practical layout options.
We work out where the shower, WC, basin, door, walls and pipe routes should realistically go.
You receive a clear quotation setting out the intended work, products, inclusions, exclusions and next steps.
Partitioning, pipework, electrics, ventilation, waterproofing, tiling, fittings and finishing are managed in the correct order.
We stay involved during the work with regular site visits, checking important details as the project moves forward.
We check the finish, operation, access points and practical details before handing over the completed en-suite.
Homeowners may want comfort and premium finishes. Landlords may want durability, easy maintenance and return on spend. We help match the design to the reason for building the en-suite.
Questions
Many internal en-suites do not need planning permission if they are created within the existing property. However, listed buildings, extensions, loft conversions, structural alterations and HMO properties may need further checks.
A new en-suite can involve drainage, ventilation, electrics, structure, fire safety and waterproofing, so building regulations must be considered properly. The exact route depends on the property and scope.
Usually drainage and space. The WC needs a sensible route to the soil pipe, shower and basin wastes need proper falls, and the bedroom must still work after the enclosure is built.
As a broad guide, a properly planned new en-suite conversion in London will often start from around £12,000–£18,000+, with more complex or higher-spec projects costing more. The real figure depends on drainage, ventilation, specification, access and the final agreed scope.
Sometimes, but it needs careful checking. The room must still satisfy relevant size and amenity standards, and the design needs to consider licensing, ventilation, drainage, maintenance and tenant use.
Yes. We can go through ideas on a large presentation tablet and, where useful, prepare more than one design direction so you can compare layouts, finishes and product options.
Yes. We coordinate the work and remain involved through the project. We work with trusted, experienced tradespeople and use appropriately qualified specialists where required.
Start your en-suite project
Tell us where you want the en-suite, what the room is used for, whether it is a private home or rental property, and whether you already have a budget in mind. You can also call us directly on 0207 386 0000.