Renovating an upstairs bathroom involves more than choosing a suite that fits the room. The fittings must reach the flat, the floor must support them, and the water and waste connections must suit the new layout. Check these points before ordering so the design works for both your bathroom and the building around it.

Measure the delivery route before buying

Measure the stairs, turns, landings, doors and any lift that will be used. Include the dimensions of the packaged bath, tray, vanity and wall panels. A product may fit inside the bathroom but still be impossible to carry through a tight stairwell. Ask the supplier and installer about access before confirming large or heavy items.

Agree how the stairs, lift and shared entrance will be protected. Check delivery times, parking and any building-management arrangements. Materials and old fittings should not block access routes. Include carrying items upstairs and removing waste in the quote so there is no misunderstanding about who will do the work or what it costs.

Check the floor for the proposed fittings

Tell the installer if you want a heavy bath, stone surface or tiled floor. The floor needs to suit the complete installation, including use of the bath. Its condition cannot be judged from the visible floor covering alone. If the weight or changes to the floor need specialist checks, get the appropriate advice before the product is ordered.

Look into soft spots, movement or evidence of previous leaks. Repairs may only become clear when the old fittings are removed. Ask how the team will report those findings and price additional work. Do not allow a new finish to cover a known problem just to keep to a date agreed before the floor was exposed.

Keep waste pipes practical and accessible

Moving the toilet or shower can mean new drainage routes through the floor or around the room. Ask to see where the pipes will run and whether boxing or a raised tray will be needed. A drawing that shows only the finished fittings may hide a loss of floor space or an awkward step.

Shared stacks and pipes may need separate checks and agreement. Confirm responsibility before changes are planned. Valves, traps and concealed cisterns should remain accessible for maintenance. If a pump is proposed for drainage, ask why it is needed, how it will be serviced and what happens if it stops working. Do not treat it as a maintenance-free substitute for suitable drainage.

Match the shower to the water supply

An upper-floor address alone does not tell you which shower will perform well. The installer should check the hot-water system, supply pressure and available flow for your flat. A large shower head cannot deliver water the system cannot supply. Compare suitable products using their requirements rather than choosing on appearance alone.

A shower pump is not appropriate for every supply arrangement. Any proposal to add one needs the system checked first. Discuss the effect of other outlets being used at the same time, especially in a shared household. Our bath and separate shower comparison can help with the space decision once the supply has been assessed.

Plan the shower floor and leak protection

A low tray or level-access shower needs a suitable drain position, layers beneath the finished floor and waterproofing system. Not every upstairs floor can accommodate the same arrangement. Ask what finished floor levels will be and how water will be contained. The door opening and screen position must leave enough room to enter and clean the shower.

Tiles and grout alone should not be treated as the waterproofing system. Connections, corners and changes between surfaces need the correct details for the products used. Ask when testing will take place and which parts remain accessible afterwards. Protecting the room below depends on the whole installation, not a claim that one surface is waterproof.

Arrange ventilation without guessing the outlet

An extractor needs a suitable route to outside air. Check where the duct runs, how long it is and whether it serves only your bathroom. Do not assume an existing vent or air brick can be used without assessment. Changes through a roof, external wall or shared part of a block may need permission.

Choose lighting and electrical fittings with a qualified electrician so they suit their positions. Around the mirror, aim for clear useful light without glare. If the room has a window, keep privacy and daylight in the design. A frosted window can help with privacy, but ventilation still needs to be checked separately.

Tell neighbours what the work will involve

Agree the working hours, shared access and contact arrangements before fitting starts. If a water shut-off or work to a shared pipe could affect neighbours, confirm who will notify them. A clear explanation of the expected disruption helps people prepare. Avoid promising the work will be silent or that the date cannot change if hidden repairs are needed.

The installer should also consider how equipment is fixed and how pipe noise may travel. Suitable fixing and support details depend on the building and products. Ask what can reasonably be improved if noise is an existing concern. Cosmetic changes alone will not resolve every sound problem between flats or through shared pipework.

Check the quote and handover details

Your quote should list the fittings, preparation, pipe changes, electrical work, removal and any specialist checks included. Confirm who will check Scottish building requirements and any permissions for the proposed alterations. Ask how unexpected repairs will be approved, when the bathroom will be unusable and what product and workmanship guarantees actually cover.

At handover, check the controls, drainage, ventilation and access panels with the installer. Keep the instructions and contact details for reporting faults. To discuss your flat, see our bathroom installation service, call 0141 471 9145 or request a free home design visit. Photos of the bathroom and delivery route will help explain what needs to change.