How to Quote for a Bathroom Renovation in the UK

To quote for a bathroom renovation, survey the property, define exactly what is included, calculate your labour and material costs, then produce an itemised quotation with a clear total and terms. A good bathroom quote covers more than the visible suite and tiles: it also accounts for preparation, plumbing, electrical work, waterproofing, waste and the risk of concealed problems.

This guide is for UK bathroom fitters, plumbers and small building firms preparing prices for domestic customers. It explains the costing process and includes a worked bathroom renovation quotation you can adapt to your own jobs.

1. Survey the Bathroom Before Committing to a Price

A proper survey is where the quotation starts. It helps you spot work that might otherwise become an unpriced return visit or an argument over what was included.

Measure the room and the areas to be finished

Record the room's length, width and ceiling height. Make a sketch showing doors, windows, existing fittings, boxed-in services, niches and any layout changes. Check that shower screens, cabinet doors and drawers will have enough clearance.

Measure wall tiling, floor tiling and decorating areas separately. Note whether tiles finish at half height, ceiling height or only around the bath and shower. The area you fit is not necessarily the quantity you buy: allow for cuts, wastage, pattern matching and full-box purchases when preparing your material order.

Also check access: stairs, parking, delivery routes, working space, dust protection and where waste can be stored before removal.

Inspect accessible services and existing conditions

Check the accessible hot and cold supplies, isolation points, waste pipe routes, soil connection and available space for new fittings. Establish whether the chosen shower will work with the property's water system and whether the intended drainage falls are practical.

Identify electrical work that needs assessing and pricing by a suitably competent electrician: lights, extractor fan, shaver point, heating controls or an electric shower, where relevant. Check ventilation and the route for any ducting.

Photograph accessible conditions with the customer's permission. You cannot reliably price concealed pipework, rotten joists or damaged substrates that have not yet been exposed, so record those limits in your assumptions rather than pretending you have inspected them.

Agree the specification and responsibilities

Ask the customer what will be retained, removed, moved or replaced. Confirm the agreed layout, tile coverage, shower type, heating, finishing standard and whether the budget includes VAT.

For each fitting, record who supplies it. A customer-supplied WC, basin or shower can reduce your material bill without reducing your responsibility to allow for fitting time, connection parts and compatibility checks.

2. Break the Bathroom Refit Into Priced Work Packages

Avoid quoting for a vague “complete bathroom refurbishment”. Write a scope that matches the work you intend to carry out.

Describe each package clearly enough that the customer can recognise what the finished bathroom will contain. If wall painting, new skirting or making good in an adjoining room is not included, say so.

A useful distinction is supply and fit versus fit only. For supply and fit, include the product specification, purchase price, delivery and installation. For fit only, name the customer-supplied products and agree who checks deliveries, arranges replacements and pays for any separately agreed return visits if components are missing or incompatible. Do not use a blanket disclaimer that attempts to remove your statutory responsibility for your own workmanship.

3. Calculate Labour and Subcontractor Costs

Build your labour estimate phase by phase, rather than multiplying a guessed number of days by a rate.

Estimate the time required

Allow working time for protection, strip-out, first fix, preparation, waterproofing, tiling, second fix, testing and handover. Account for awkward access, detailed tile patterns, heavy fittings, material collections and likely return visits.

Distinguish working days from elapsed project time. Waterproofing, adhesives and other products may require curing time. A job that occupies two calendar weeks does not necessarily contain ten full days of chargeable installation work, but repeated journeys and gaps between trades still cost money.

Use a rate that reflects your business costs

Your labour costing needs to account for the money you pay yourself or employees, and the chargeable days actually available. Holidays, quoting, administration and travel all reduce the number of days you can sell.

Choose a consistent method for recovering overheads, such as an allowance per chargeable day or a separate allocation to each job. Do not count the same overhead twice if your labour rate already includes it.

Get written subcontractor prices

Obtain a clear scope and price for electrical work and any specialist packages you will subcontract. Ask whether the price includes materials, testing, records or certificates, travel and return visits. Check how VAT is treated on the subcontractor's invoice.

If you coordinate the trades, allow for your own management and scheduling time. Confirm availability before giving the customer a firm programme.

4. Price Materials, Fittings, Waste and Markup

Prepare a materials schedule from the agreed specification. Obtain current supplier prices rather than relying on what the same suite or tile cost on your last job.

Include the less obvious items: backer boards, waterproofing components, adhesive, grout, trims, valves, traps, flexi-connectors where suitable, fittings, sealant, blades, protection and delivery charges. Check quantities and pack sizes, then record the supplier and product references in your costing notes.

Waste removal is part of the cost calculation, not an afterthought. Allow for labour, skips or collections, transport and disposal. Check the requirements that apply to your business for carrying waste and transferring it to an authorised operator. In England, see the GOV.UK waste-carrier registration guidance and waste duty-of-care code; requirements and registration processes differ across the UK.

Turn job costs into a selling price

Once you have your labour, materials, subcontractors, waste and allocated overheads, add your planned markup.

• Markup is the amount added to cost: £100 cost plus 20% markup gives a £120 selling price.
• Margin on that cost basis is the £20 difference divided by the £120 selling price: approximately 16.7%.

This difference is not automatically your net profit. Costs you omitted, overruns, finance costs and any business overheads not already included will reduce what you keep.

For VAT, a normal domestic bathroom refit is generally standard-rated when supplied by a VAT-registered business. The UK standard rate is 20%, but qualifying building work may have different treatment. Check HMRC's VAT guidance for builders and the current VAT rates. A non-VAT-registered business does not add VAT to its customer invoice and must account for irrecoverable supplier VAT within its costs. Give domestic customers a clear amount payable, including VAT where applicable.

5. Deal Properly With Unknowns and Changes

Bathrooms frequently hide damaged plasterboard, unsuitable floors, leaking pipework or poor drainage. That does not mean every unexpected problem automatically entitles you to charge more than an accepted fixed quotation.

Separate exclusions, allowances and contingency

• Exclusion: work that is specifically outside the price, such as replacing concealed rotten joists that have not been inspected.
• Provisional allowance: an identified amount for a selection or uncertain package, with a stated basis for agreeing the final price. Make clear whether it is included in the quoted total and how it will be adjusted.
• Contingency: money you allow internally for risks you are pricing into the job. It is not an automatic extra charge to the customer.

Do not exclude work you already know is necessary to complete the agreed installation. Price it or resolve it before issuing a fixed offer.

If opening up reveals additional work, photograph and explain the problem. Provide the proposed remedy, cost and effect on the programme, then seek the customer's agreement before carrying out chargeable extra work, apart from immediate action necessary to make the area safe. Record agreed variations in writing.

Quotation versus estimate

A quotation offers an agreed price for defined work, subject to the contract and any agreed changes. An estimate gives an approximate expected cost. Calling something an estimate does not remove the need for clear terms or reasonable pricing.

Citizens Advice explains the important distinction: an agreed quotation cannot normally be increased simply because the contractor's costs have risen. See its guidance on building-work disputes, which is written for England; check the relevant advice for other UK nations.

6. Worked Example: Bathroom Renovation Quote (UK)

Illustrative example only. The figures below are fictional to demonstrate quotation structure and arithmetic. They are not verified UK market averages, a recommended day rate or a promise that this specification can be delivered at this price.

Assume a domestic bathroom measuring 2.4 m × 2.0 m (4.8 m² of floor space, rounded to 5 m² for the illustration). A measured tile schedule requires 18 m² of wall tiling and 5 m² of floor tiling. The bath, shower and other main fittings remain in broadly the same positions.

The contractor supplies the bath, screen, shower fittings, WC, basin, taps, heated towel rail and selected tiles. The existing visible services appear suitable and the accessible floor is sound. The exact product models, finishes and waterproofing specification would be documented before issuing a real quote.

Customer-facing itemised quotation

All line prices below are selling prices excluding VAT. “Package” means one described work package, not an unspecified day rate.

The tile-fixing quantity is 23 m²; the quantity purchased can be higher to cover cuts, wastage and supplier pack sizes. The supply package needs a product schedule rather than an unsupported assumption that every tile costs the same.

This example also assumes that any waterproofing components are included in the preparation package, not charged again under sundries.

Internal costing check: different from the customer's quote

The customer sees the defined work and selling prices. Your private costing sheet should explain how those prices recover the job's costs.

The customer-facing lines and internal cost categories use different groupings; the illustration does not claim each individual line has exactly 20% markup. The overall £1,000 difference equals 20% of the £5,000 cost base, or approximately 16.7% of the £6,000 pre-VAT selling price. It is a planned return above the listed costs, not a guarantee of net profit.

Example inclusions, assumptions and exclusions

A real quotation should state the details that make those prices meaningful. For example:

Included: Strip-out, specified supply-and-fit items, plumbing, agreed electrical and ventilation work, preparation, waterproofing, tiling, testing, cleaning and disposal as listed above.

Assumptions: Main sanitaryware positions remain unchanged. Existing accessible drainage and services can support the new installation. Concealed floors and wall construction have not been opened up or inspected.

Excluded: Structural repairs, asbestos investigation or removal, major drainage rerouting, consumer-unit upgrades and repairs or decoration outside the bathroom unless specifically listed. No unspecified remedial work is included.

Changes: If additional work is needed, the contractor will explain the scope, price and programme impact and obtain agreement before proceeding, subject to any immediate safety action required.

These are sample descriptions, not universal contractual terms. Rewrite them to match the survey and the actual agreement; an exclusion cannot be used to remove the customer's statutory rights.

7. Check the Written Quote Before Sending It

Before sending a bathroom renovation quotation, confirm that it contains:

• Your business name, address and contact details, plus the customer's name and site address.
• A quotation reference, issue date and validity period.
• An itemised scope with accurate quantities and product details, including who supplies each fitting.
• The price, VAT treatment and total payable.
• Clear inclusions, exclusions and any provisional allowances.
• Expected start date or start-date conditions, likely duration and dependencies on other trades or deliveries.
• Any deposit and stage payments, with agreed amounts and payment milestones.
• A process for agreeing variations and a record of what the customer has accepted.

Consumer rights matter. Under the Consumer Rights Act 2015, consumer services must be performed with reasonable care and skill. Depending on how and where the agreement is made, the Consumer Contracts Regulations 2013 may require pre-contract information and cancellation rights. For qualifying distance or off-premises service contracts, the standard cancellation period is generally 14 days, but contract type, exceptions and requests to start early affect the position. Check the applicable requirements rather than treating a sentence in the quote as sufficient.

Electrical work must also be assessed under the relevant rules. For England, Approved Document P explains electrical safety and when building-control notification is required; not every task in a bathroom is automatically notifiable. Requirements differ in Wales, Scotland and Northern Ireland. Confirm the appropriate route for inspection, testing, records and notification with the electrician.

Finally, read the finished PDF as though you were the customer. Check that product references, line totals, VAT, exclusions and payment terms agree with the attachments. Keep a copy of the issued quote and any written acceptance or later variations.

Make the Next Bathroom Quote Easier to Check

A reliable bathroom quotation starts with a measured scope and a realistic costing sheet. Price the hidden work as carefully as the visible fittings, state what is excluded and agree changes before carrying out extra chargeable work.

Once your figures are ready, Quote Forge can help you prepare an itemised, branded quotation using quantities, costs and markup, then export a customer-facing PDF. The software helps present the price clearly; the accuracy of the survey, specification and costs still rests with you.

Frequently Asked Questions

Can I quote for a bathroom renovation without visiting the property?

You can provide a preliminary estimate from photographs, dimensions and a detailed brief. For a substantial refit, a site survey is usually the safer basis for a fixed quotation because accessible services, preparation and working conditions affect the scope.

Should I quote labour only if the customer buys the bathroom suite?

You can quote a fit-only package, but include all installation labour and clearly say whether connection parts, sundries, delivery handling, waste and return visits are included. Confirm the exact models and their compatibility before committing to the price.

How much contingency should I put into a bathroom quote?

There is no reliable fixed percentage that suits every bathroom. Base your internal allowance on the condition of the property, the work you can inspect and your experience of similar jobs. Do not confuse your own contingency with a contractual right to charge extra.

What happens if I discover rotten flooring after strip-out?

Make the area safe, document the condition and check whether the repair is already covered by the agreed scope. If extra chargeable work is required, provide the cost and programme impact and obtain the customer's agreement before proceeding, subject to immediate safety needs and applicable contractual rights.