Planning a Bathroom Renovation: Order, Trades and Budget
The sequence of a full bathroom renovation, which trades you need and how to build a realistic budget with contingency.
When a bathroom has leaks, failing tiles, poor layout or outdated plumbing, a refresh is not enough. A full renovation can transform the room, but it involves several trades and many decisions that need to be made before work starts. Poor planning is the main cause of delays and budget overruns.
This guide outlines the typical stages, what to decide before the first tile comes off, and how to approach budgeting. Regulations differ between countries and buildings, so always check local requirements and building rules.
Practical tips
- Define the scope in writing. List what is changing: layout, fixtures, tiles, ventilation, lighting, storage. A written scope lets you compare quotes fairly.
- Choose fixtures before work starts. Toilet, basin, shower and taps affect pipe positions. Changing your mind mid-project is expensive.
- Understand the typical order. Strip-out, first-fix plumbing and electrics, any structural or floor work, waterproofing, plastering or boarding, tiling, second-fix (fitting fixtures), and finally sealing and decoration.
- Do not skimp on waterproofing. Wet areas such as showers need proper waterproofing beneath the tiles. This is invisible when finished but critical.
- Get several detailed quotes. Ask for itemised quotes covering labour, materials, waste removal and timeline. Check references and any licences or registrations relevant in your area.
- Add a contingency. Many renovators set aside around 10–20% of the budget for surprises such as rotten floorboards or hidden pipework. Treat this as a planning assumption, not a guarantee.
- Plan for living without the room. If it is your only bathroom, ask how long it will be unusable and plan alternatives.
Common mistakes to avoid
- Choosing tiles before deciding on layout and fixtures.
- Comparing quotes that cover different scopes.
- Not having any contingency.
Illustrative example · not a real customer story
Example: the leaking shower room
Before
A small shower room where the tray leaks into the ceiling below, tiles are cracked, the layout puts the toilet directly behind the door, and there is no extractor fan.
What changed
In this illustrative example the homeowner writes a scope (new tray and waterproofing, relocated toilet, new extractor, wall tiling, new vanity), chooses fixtures first, and gets three itemised quotes. The chosen contractor's schedule runs from strip-out through first-fix, waterproofing, tiling and second-fix. A contingency is set aside and partly used when a damaged floor joist is found.
After
The room has a sound, sealed shower, a more practical layout and proper ventilation. Because fixtures were chosen in advance, there were few changes mid-project.
This is a composite scenario written to show how the tips might be applied. It does not describe a specific person or verified result.
Rough budget and time
| Item | Rough range (INR) | Rough range (USD) |
|---|---|---|
| Fixtures (toilet, basin, shower, taps) | ₹40,000–₹2,00,000 | $1,000–$5,000 |
| Tiles and waterproofing materials | ₹25,000–₹1,20,000 | $800–$3,500 |
| Labour (all trades) | ₹60,000–₹3,00,000 | $4,000–$15,000 |
| Contingency (10–20%) | ₹15,000–₹1,00,000 | $1,000–$4,000 |
Estimated time: Commonly two to six weeks depending on scope and trade availability.
Keeping it working
After completion, keep a file with fixture model numbers, warranties, tile names and batch numbers, any certificates issued, and contractor details. Store spare tiles and grout for future repairs. Follow the manufacturers' care instructions for the shower and taps, and check sealant and grout periodically. A well-documented renovation is also easier to maintain and repair years later.
Safety notes
- Plumbing, electrical and structural work should be done by qualified professionals following local regulations and any building or society approvals.
- Older buildings may contain hazardous materials such as asbestos in some boards, flooring or textured coatings; have suspicious materials tested before disturbing them.
- Wear protective equipment during strip-out, and never work on a ladder over an open floor.
Read our full DIY safety disclaimer. When in doubt, hire a qualified professional.