# What to include in a shower tray replacement quote Plan a UK shower tray replacement estimate with measured scope, product choices and exclusions. Review 7 fictional GBP lines and the matching £1,668.00 PDF example. Canonical: https://quicklyestimates.com/en-gb/guides/how-to-estimate-shower-base-replacement/ Author: Estimates editorial team Published: 2026-09-25 Updated: 2026-09-25 Estimate shower tray replacement by measuring the defined one existing shower footprint, separating product allowances from labour and setting out the work sequence and exclusions. This fictional Bristol example uses 7 itemised lines totalling £1,668.00; its exact quantities and rates appear in the paired app PDF. THE ESTIMATING ANSWER Estimate shower tray replacement by measuring the defined one existing shower footprint, separating product allowances from labour and setting out the work sequence and exclusions. This fictional Bristol example uses 7 itemised lines totalling £1,668.00; its exact quantities and rates appear in the paired app PDF. The worked job is one existing shower footprint in Bristol . The written scope is: Remove a leaking shower tray and install a selected new base in the existing enclosure footprint, reconnecting to a suitable drain. Retain sound wall finishes where possible. Its matching itemised example (https://quicklyestimates.com/en-gb/samples/shower-base-replacement-estimate/) shows how that description becomes quantities, allowances and a PDF. These figures are fictional inputs for learning the method, so check the real site, specification and supplier or subcontractor costs before quoting. 1. Define the measured job Remove a leaking shower tray and install a selected new base in the existing enclosure footprint, reconnecting to a suitable drain. Retain sound wall finishes where possible. Measure the finished opening, threshold, drain offset and surround overlap before ordering a base. Record the measurements and existing condition in the estimate before turning quantities into line items. The scope should make clear why this is a separate project from a broader renovation or maintenance quote. Measure for this job: Measure the finished opening, threshold, drain offset and surround overlap before ordering a base. Record the measured basis next to the relevant cost lines, since a room count, fitted length and purchased product quantity may each use a different unit. 2. Build a product and labour schedule Identify the base, waste assembly and any wall-repair allowance separately. This example has 7 distinct lines, including protection and enclosure removal, old base removal, new base allowance. Use actual supplier prices and labour inputs for a customer job; the displayed amounts are fictional document inputs. Choose before pricing: Identify the base, waste assembly and any wall-repair allowance separately. Keep a named allowance when the selection is open, and replace it once the actual product and delivery terms are known. 3. Sequence the work and handoffs Sequence enclosure removal, base inspection, waterproofing and reinstatement so each trade knows the handoff. Show which task depends on access, a selected product or another trade. If that dependency is still open, label the price preliminary and identify the information needed before a firm quote. Plan the handoffs: Sequence enclosure removal, base inspection, waterproofing and reinstatement so each trade knows the handoff. State which stage needs access or inspection before the next can begin, especially if a concealed condition might stop the work. 4. Set a change boundary Wet subfloor or incompatible drain geometry is a change trigger after removal. The example excludes full shower wall rebuild, structural floor repair or fixture relocation. Record the discovery, agree the revised work and update the estimate before adding it to the job. Change trigger: Wet subfloor or incompatible drain geometry is a change trigger after removal. If this happens, write down the revised quantity and responsibility before adding an item to the customer estimate. Worked project calculation The paired PDF has 7 cost lines. For example, Protection and enclosure removal is 1 lump sum × £144.00 = £144.00; Old base removal is 1 each × £200.00 = £200.00. Each amount is the stated quantity multiplied by its unit rate. Recheck whether a line describes installed work, a material purchase allowance or a distinct visit before changing its quantity. Shower tray replacement example — GBP, fictional inputs Work item | Quantity | Unit rate | Amount | Protection and enclosure removal | 1 lump sum | £144.00 | £144.00 | Old base removal | 1 each | £200.00 | £200.00 | New base allowance | 1 each | £544.00 | £544.00 | Waste connection allowance | 1 set | £112.00 | £112.00 | Base fitting labour | 1 each | £344.00 | £344.00 | Perimeter waterproofing and seal | 1 lump sum | £208.00 | £208.00 | Clean-up and disposal | 1 lump sum | £116.00 | £116.00 | Illustrative total | £1,668.00 | Adding the 7 exact line amounts gives £1,668.00 . The PDF uses a 0% tax input and no markup solely to display this arithmetic. Decide the appropriate tax, overhead and profit treatment for an actual job; the fictional rates are not local averages or price recommendations. Scope and price boundaries Remove a leaking shower tray and install a selected new base in the existing enclosure footprint, reconnecting to a suitable drain. Retain sound wall finishes where possible. Outside this example: No full shower wall rebuild, structural floor repair or fixture relocation. The role in this brief is refurbishment contractor. Confirm who supplies the selected products, makes the site safe, removes waste and signs off the work. Where opening up reveals a different condition, document it and issue a revised scope and price rather than silently extending the base estimate. Also check access, drying or curing time, and the client handoff described in the work sequence. Before you send - Measure the finished opening, threshold, drain offset and surround overlap before ordering a base. - Identify the base, waste assembly and any wall-repair allowance separately. - Sequence enclosure removal, base inspection, waterproofing and reinstatement so each trade knows the handoff. - Wet subfloor or incompatible drain geometry is a change trigger after removal. Compare the written scope with every line in the shower tray replacement PDF example (https://quicklyestimates.com/en-gb/samples/shower-base-replacement-estimate/). The preview below is the first page of the actual app export; open the PDF to inspect its full scope, notes and amounts. (https://quicklyestimates.com/assets/guides/shower-base-replacement/en-GB/estimate.pdf) Questions about this job Which quantity controls this shower tray replacement estimate? Measure the finished opening, threshold, drain offset and surround overlap before ordering a base. When should this shower tray replacement quote be revised? Wet subfloor or incompatible drain geometry is a change trigger after removal. No full shower wall rebuild, structural floor repair or fixture relocation. FROM SITE NOTES TO AN ITEMISED PDF Build your own shower tray replacement estimate Enter the project boundary and your measured lines in Estimates on iPhone or Android. Edit the fictional quantities and rates, add the actual business and client details, then inspect the PDF before sharing it. Create an estimate ↗ (https://quicklyestimates.com/en-gb/download/)Open the worked example → (https://quicklyestimates.com/en-gb/samples/shower-base-replacement-estimate/) Get the app: https://quicklyestimates.com/en-gb/download/ App Store (iPhone): https://apps.apple.com/app/id6740389403 Google Play (Android): https://play.google.com/store/apps/details?id=com.uzel.contractorplus