A bathroom renovation checklist matters more than a checklist for any other room, because the bathroom is the most trade-dense space in the house. A small room — often three or four square metres — pulls in a plumber, an electrician, a tiler, sometimes a plasterer and a carpenter, all working in sequence in a confined space where one missed decision blocks the next trade. The checklist is what keeps that sequence from breaking, and a broken sequence in a bathroom is what gets a small room quoted twice.
★★★★★ RATED 4.9/5 BY VERIFIED BUYERS The Bathroom Renovation Blueprint The trades quoting your bathroom have done this a hundred times. Walk in knowing every phase, every cost, every decision — so they price the renovation, not your inexperience. See what's inside → Instant download · 30-day money-back guaranteeA working bathroom renovation checklist forces every decision that affects the price to be settled before the price is quoted, and it sequences those decisions so the fixture positions are fixed before the first fix, the waterproofing is signed off before the tiling, the extraction is planned before the walls are closed. The prepared homeowner who works from a checklist hands out a brief specific enough that three quotes price one bathroom rather than three.
A bathroom is the most trade-dense room in the house; the checklist is what keeps a small room from being quoted twice.
What follows is the definitive checklist for an Irish bathroom renovation — every decision, in the order it has to be made, with the one hold point that, skipped, turns a finished bathroom into a stripped one. Read it once and the bathroom is half-planned before the first trade is called.
Why a bathroom renovation needs a checklist
Because the trade density is unforgiving. In a kitchen the trades have room to work around each other; in a bathroom they do not. The plumber sets the first fix, the electrician follows, the waterproofer seals, the tiler covers, and the second-fix plumber and electrician finish. Each trade depends on the one before it being correct, and a confined wet room offers nowhere to hide a mistake. A bathroom renovation checklist exists to lock the decisions that keep that chain intact.
The second reason is that the bathroom hides its most expensive decision behind the tiles. Waterproofing is invisible once the tiling is down, which means it is the one element a homeowner cannot inspect after the fact. If it was not done correctly, the only way to find out is the leak that appears months later, and the only way to fix it is to strip the room back to the substrate. The checklist puts that hold point where it belongs — before the tiler arrives, not after the bathroom is finished.
The third reason is leverage, the same as any room. Every decision a homeowner locks before signing is a decision the trade cannot reprice later. In a bathroom, where the variations are concentrated in the unseen first-fix and waterproofing stages, the checklist is the homeowner's only real defence against a low quote that recovers its margin once the walls are open and the work has started.
What goes on a bathroom renovation checklist
Every Irish bathroom renovation moves through the same decisions in the same order. The checklist below is that order. Work down it before the first trade conversation, and the brief you hand out is specific enough that the quotes come back genuinely comparable. Where homeowners most often break the sequence is covered in the most common bathroom renovation mistakes Irish homeowners make.
- Write the brief around who uses the bathroom and how. Document, before anything else, whether this is a main bathroom, an ensuite, or a family bathroom, who uses it and when, and whether the priority is a bath, a shower, or both — because the brief is the single document every later decision and every quote is measured against.
- Set a real budget and confirm how the VAT will fall. Fix a number you can defend against a typical bathroom renovation cost in Ireland, or against the small bathroom renovation cost bands if the room is compact, and confirm with each trade whether the job qualifies for the reduced 13.5 percent VAT rate or tips into the standard 23 percent under the two-thirds rule, because on a fixture-heavy bathroom that distinction is real money.
- Fix the layout and the position of every fixture. Decide where the toilet, basin, bath, and shower sit before any other decision, because moving a soil pipe or a water feed is the single most expensive change in a bathroom, and keeping the fixtures in their existing positions can save a significant sum on plumbing alone.
- Decide the waterproofing and tanking approach. Confirm how the wet areas will be tanked and that the membrane will be signed off before any tile is laid — there is no single mandated waterproofing standard in Ireland, which makes this a best-practice hold point the homeowner has to insist on rather than assume.
- Choose the tiling. Select wall and floor tiles together with the layout, confirming slip resistance on the floor and the extent of the wall tiling, because the tile decision sets both a material cost and the labour the tiler quotes against.
- Plan the ventilation to Part F. Specify mechanical extraction sized for the room, because a bathroom generates the water vapour that causes condensation and mould, and adequate ventilation is a Building Regulations requirement under Technical Guidance Document F.
- Settle the lighting and the electrical points. Decide the lighting, the extractor, the shaver point, and any heated towel rail or underfloor heating, then confirm every fitting suits its zone in a wet room, because bathroom electrical work carries specific safety rules and is set at first fix.
- Choose the vanity, sanitaryware, and fittings. Lock the toilet, basin and vanity, bath, shower, screen, taps, and brassware, because these are the visible spend and the long-lead items, and a late change here delays the second fix.
- Check planning and the building-control position. Confirm the work is exempted development, which an internal bathroom renovation within the existing footprint almost always is, or whether an extension or material alteration brings it inside planning permission and the Commencement Notice rules.
- Sequence the trades and the long-lead orders. Map the order the trades run in — first-fix plumbing and electrical, waterproofing, tiling, then second fix — and place long-lead sanitaryware and brassware orders before site work, or the project waits on a delivery.
- Walk the defects list before the final payment. Inspect every element against the brief — the fall to the drain, the grout and silicone, the screen seal, the extractor running, and the Safe Electric certificate — before releasing the final payment, because the leverage to compel rework disappears the moment that payment clears.
Get your bathroom cost baseline first
The free Renovation Cost Calculator gives you a trade-by-trade estimate in under 5 minutes — before your first trade conversation. The number it produces is the benchmark every decision on the checklist is measured against.
Why waterproofing is the decision you cannot skip
Waterproofing is the one decision on the bathroom checklist where getting it wrong cannot be corrected without undoing the room. Once the tiling is down, the membrane beneath it is sealed out of sight. There is no inspection that can verify it after the fact, no patch that can repair it from above, and no way to know it failed until water has tracked into the substrate, the adjoining wall, or the room below. The cost of doing it correctly is a hold point of a single day; the cost of skipping it is a stripped bathroom.
What makes this harder in Ireland is that there is no single mandated waterproofing standard the way some markets have one. Wet-area tanking is governed by best practice and manufacturer specification rather than one named code a homeowner can point a trade to. That absence does not lower the stakes — it raises them, because it puts the responsibility on the homeowner to insist that the wet areas are properly tanked and that the membrane is signed off before tiling, rather than assuming a standard will compel it. The full detail on how Irish wet areas should be tanked is in the guide to bathroom waterproofing in Ireland.
The discipline is simple and non-negotiable: the waterproofing is a hold point, not a step. Work stops, the membrane is verified, and only then does the tiler begin. A homeowner who treats it as just another item on a busy schedule is a homeowner relying on the trade to self-police the one thing that, done wrong, costs the most to put right. Make it the line on the checklist that does not get crossed without a sign-off.
Waterproofing is the only decision on a bathroom checklist that cannot be inspected once the room is finished. Verify the membrane before the tiler starts, or accept that the only way to check it later is to strip the room.
It is invisible once tiled. There is no single mandated standard in Ireland, so the homeowner must insist on it. Treat it as a hold point — work stops, the membrane is signed off, then tiling begins.
What you can do without planning permission
For most bathroom renovations the answer on planning is straightforward: none is required. An internal bathroom renovation that stays within the existing footprint and does not change the use or external appearance of the building is generally classed as exempted development in Ireland, which means no planning application is needed. Replacing the suite, retiling, moving fixtures within the room, and upgrading the ventilation are all work that sits inside the exemption. The current exemption rules are set out by Citizens Information.
The exemption has the same boundary as any room. If the bathroom is created or enlarged through an extension, planning permission is only required above the exemption limits — broadly, an extension up to forty square metres in total can be exempted, subject to conditions on height, position, and how much of the rear garden is built on. A bathroom that stays inside the existing walls is almost always exempt; a bathroom that grows the house is where the rules begin to apply.
There is a separate building-control step that catches homeowners by surprise. Where the work is a material alteration to the structure, a Commencement Notice must be lodged with the local authority's Building Control before work begins. This is not planning permission and it is not the same thing — it is a distinct notification, and on qualifying works missing the window can stall a project before the first trade is booked. The ventilation requirement under Technical Guidance Document F applies regardless of whether planning is needed.
Where the checklist fits the bigger system
A bathroom renovation checklist is the room-level expression of a larger sequence. Every renovation — bathroom, kitchen, or whole house — moves through the same twelve phases from brief to sign-off, and the checklist above is those phases applied to a bathroom specifically. The decisions change room to room; the order does not. The full sequence every renovation runs through is laid out in The 12-Phase System.
What the checklist does is convert that sequence into a working document the homeowner can hold a project to. The brief is phase one. The budget and VAT position are phase two. The fixture layout and the specification are phase three. The waterproofing is the hold point at phase nine. The defects walk is phase eleven. A homeowner who can point to a settled decision for each line is a homeowner genuinely at the phase they think they are at — and not, as so often happens in a fast-moving bathroom project, three phases behind the calendar.
That is the difference between a bathroom that finishes close to the agreed price and one that does not. The checklist is the prerequisite; the system is what carries it through. A homeowner who works the checklist and then runs the phases in order is the homeowner the trade prices accurately rather than the one the trade prices to.
See The Bathroom Renovation Blueprint
Every decision on the checklist, run through every phase of an Irish bathroom renovation — the fixture layout, the waterproofing hold point, the certificates to demand — before each one needs to be made.
If the cost baseline is the right first step, use the free Renovation Cost Calculator — a trade-by-trade estimate for your specific bathroom, in under 5 minutes, before any trade has quoted.
Frequently asked questions
What should be on a bathroom renovation checklist in Ireland?
A bathroom renovation checklist should run, in order: the brief built around who uses the room, the budget and VAT position, the fixture layout, the waterproofing and tanking decision, the tiling, the ventilation to Part F, the lighting and electrical points, the vanity and sanitaryware, the planning and building-control check, the trade sequence and long-lead orders, and the defects walk before final payment. Because a bathroom is the most trade-dense room in the house, working the list in that order is what keeps the sequence from breaking.
Why is waterproofing the most important bathroom decision?
Because it is the only decision that cannot be inspected once the room is finished. Waterproofing is sealed beneath the tiles, so if it was done incorrectly the only sign is a leak months later, and the only fix is to strip the room back to the substrate. There is no single mandated waterproofing standard in Ireland, which means the homeowner must insist that the wet areas are properly tanked and the membrane signed off before any tiling begins, rather than assuming a code will compel it.
Do you need planning permission to renovate a bathroom in Ireland?
Usually no. An internal bathroom renovation that stays within the existing footprint and does not change the use or external appearance of the building is generally classed as exempted development, so no planning permission is required. Planning permission is only needed if the bathroom is created or enlarged through an extension above the exemption limits. Where the work is a material alteration to the structure, a Commencement Notice must be lodged with Building Control before work begins.
What VAT rate applies to a bathroom renovation in Ireland?
Renovation and fitting services are generally charged at the reduced 13.5 percent VAT rate rather than the standard 23 percent. However, under the two-thirds rule, if the cost of the materials supplied exceeds two-thirds of the total VAT-exclusive price, the whole job is charged at 23 percent instead. On a fixture-heavy bathroom this is worth confirming with the trade before signing, so the budget reflects how the materials and labour will be invoiced.
What ventilation does an Irish bathroom need?
A bathroom needs adequate mechanical extraction to remove the water vapour generated by showers and baths, because excess moisture causes condensation and mould. Ventilation in Irish dwellings is a Building Regulations requirement set out in Technical Guidance Document F, and a bathroom or other wet room is one of the spaces where mechanical extraction is commonly required. The extractor should be sized for the room and confirmed at first fix, not added as an afterthought.
In what order should the trades work on a bathroom?
The order is first-fix plumbing and electrical, then waterproofing, then tiling, then second-fix plumbing and electrical to install the fixtures, with the defects walk before final payment. Each trade depends on the one before it being correct, and the waterproofing sits as a hold point between first fix and tiling — work stops, the membrane is verified, and only then does the tiler begin. Breaking that sequence is what gets a small bathroom quoted twice.