Start With the Building, Not the Bathroom

A tenement bathroom renovation in a Glasgow tenement can look simple on paper, but then you lift a floorboard, trace the drainage or work out how a new bath is getting up the close.

That’s the reality of working with older flats. They’re entirely workable, but they come with constraints you won’t usually find in a newer property. Knowing what you’re dealing with before work starts can save a lot of expensive changes later.

Confirm where the WC can go before designing anything

Fix the pan position first, then design the bathroom around it. The soil stack serves every flat on that side of the building, and the WC needs a short branch into it at the correct fall. Move the toilet across the room, and you may need a longer waste run and deeper boxing, which can quickly eat into the space you were trying to gain.

In a compact Govanhill tenement shower room, there may only be one sensible position for the pan. Establishing that early saves you designing a layout that has to be redrawn later. The other fittings give you more flexibility. Basins, showers and towel rails only need the appropriate supply and waste connections, so they can usually move around fairly freely. A bath will often move too, provided its waste can still reach a suitable connection at the right gradient. Ask your contractor to confirm the stack position and existing branch before you commit to the layout. Without that information, you’re designing around guesswork.

Check the walls and floor before choosing fittings

Once the basic layout works, look at what the room itself will allow. Don’t settle the final specification until someone has properly checked what they’re working with. That means more than standing in the doorway with a tape measure; a useful survey may involve lifting a board and looking behind a panel.

Sandstone external walls don’t take fixings like a modern stud wall and can be slow to chase. Lath-and-plaster partitions crack easily, don’t carry much weight and often hide earlier repairs. All of that matters if you’re planning wall-hung sanitaryware or large-format tiles, where the condition and flatness of the substrate become important.

Firms that regularly work with period properties should survey these details before committing to the job. It’s one reason owners of older flats often approach bathroom renovation specialists in Glasgow such as HomeDecorZone, who carry out a free property survey first and set the scope around what they actually find. Skip that step and the specification gets rewritten once the room is open. Working with one firm that handles the plumbing, joinery, tiling, and electrics also saves you from chasing four trades when something turns up.

Ask what happens if something turns up

That survey may also uncover problems that weren’t visible beforehand. Lead tails still in service, redundant dead legs, or a joist end that has gone soft beneath a bath that has been leaking for years are all possible in an older property.

A well-planned bathroom renovation in Glasgow should allow for that possibility at survey stage and explain, in writing, how genuine unforeseen problems will be dealt with. Ask before work begins what happens if the floor comes up and something needs repairing. A vague answer at this stage is a good warning sign that the project could drift later.

Establish whether you need a Building Warrant

The next question is whether the work needs formal consent. Scotland has its own system, with warrants issued under the Building (Scotland) Act 2003 and the Building (Scotland) Regulations 2004. Part P, which appears in a lot of English renovation advice online, doesn’t apply in Scotland.

Replacing sanitaryware like for like in its existing position is exempt, so a straightforward refit doesn’t require an application. A warrant must be granted before work begins for:

• Forming a bathroom where there wasn’t one before
• Relocating the WC or altering the soil pipe
• Structural alterations, including opening up a wall
• New below-ground drainage

Check your proposed layout against that list while you’re still at the design stage. Applications go to Glasgow City Council Building Standards through the eBuilding Standards portal, and mygov.scot explains the process and timescales. Finding out halfway through the job can mean stopping work until the warrant is granted.

Agree who is certifying the electrics

Consent isn’t the only paperwork to settle before work starts. Bathroom electrics fall under BS 7671 and should be certified by an electrician registered with SELECT or NICEIC, so confirm that electrical certification is included and that you’ll receive the paperwork at handover.

Keep it with any Building Warrant approval and the rest of your renovation documents. It may not seem important once the bathroom is finished, but it can matter years later when a solicitor asks for the paperwork during a sale.

Sort access and neighbours before the start date

Then there’s the practical side of working in a tenement. Everything has to come up the stairs by hand, and that needs planning rather than assuming it will somehow work on the day. A 1700mm bath, for example, isn’t much use if it won’t make the turn on the half-landing.

Agree the following before the start date:

• How materials will reach the flat, including whether a 1700mm bath or full-length wet wall panels will fit through the stair
• Where waste will go and who will arrange the skip permit, as kerb space isn’t guaranteed on every street
• How the old suite will leave the property, particularly if there’s a cast iron bath that needs breaking up in the room
• How the common stair will be protected and who will clean it each day
• What working hours apply and whether your title deeds contain any restrictions

Speak to the flats above and below before work on the stack is scheduled, because their drainage will be unavailable for part of the day. It’s also worth checking your deeds and contacting the factor about anything affecting common parts. Five minutes spent speaking to people in the close beforehand can prevent complaints that hold the job up later.

Agree the sequence and the scope in writing

With the layout, property condition, consent and access understood, the final step is getting the actual job clearly defined. Ask for a written programme with indicative timings covering strip-out, first-fix plumbing and electrics, tanking and forming falls if you’re creating a wet room, wall preparation, second fix, sealing and snagging.

Some stages need time to cure before the next one can begin, and the same specification will generally take longer to complete in a tenement than it would in a newer flat. However, be wary of anything promising a complete refit inside a working week, because something has probably been left out.

Before agreeing terms, make sure the written scope covers:

• Joist repair and floor preparation
• Making good and reinstating walls after first fix
• Waste removal
• Tanking where an open shower area is involved
• Electrical certification
• Who is supplying the materials

Make sure that you get all of that in writing, along with insurance details and the workmanship guarantee being offered. A contractor who regularly works on period properties should have no problem providing it.

Book a Survey Before Committing to a Layout

Tenement constraints are workable when you find them during the survey rather than after the floor is already up. Before ordering fittings, arrange for a contractor with genuine period-property experience to identify the stack position, check the walls and floor, confirm the consent position and consider access.

Ask them to explain clearly what your proposed layout involves and put the scope in writing. A firm that can do that and point you towards verified reviews on MyBuilder or Checkatrade is the one worth considering taking forward.