Source: https://www.quantsurv.com/library/tools/development-cost-appraisal Content format: Markdown version of the public page. Content reviewed: 2026-10-14 # Development cost appraisal Set out the construction and wider development cost assumptions before comparing them with an indicative completed value. by [Jack Butler-Kettle]() · About 2 min readShare ## How to use it Replace the invented assumptions with professional project evidence. Include land, fees, finance, sales costs and tax consistently; test timing and downside cases separately. ### Development cost appraisal Replace the invented assumptions with professional project evidence. Include land, fees, finance, sales costs and tax consistently; test timing and downside cases separately. [Download blank Excel workbook]() Free blank template for your own project. The completed example is shown below. No email address required. View the completed example Completed fictional example Westhaven refurbishment · 14 October 2026 · Version 1.0 #### Development cost appraisal Scroll across if needed to read the whole record. A dash means no value has been entered. Development cost appraisal: completed fictional example | Scenario | Completed value (£) | Land (£) | Construction (£) | Fees / risk (£) | Finance / sales / tax (£) | Indicative surplus (£) | Basis | | --- | --- | --- | --- | --- | --- | --- | --- | | Base teaching case | £900,000.00 | £200,000.00 | £450,000.00 | £70,000.00 | £60,000.00 | £120,000.00 | All project costs entered on consistent VAT basis; no benchmark claim | | Construction downside | £900,000.00 | £200,000.00 | £495,000.00 | £70,000.00 | £60,000.00 | £75,000.00 | Construction cost 10% higher; other assumptions held fixed | The example surplus falls from £120,000 to £75,000. This simple appraisal does not model discounted returns, borrowing drawdowns or market value; those need separate analysis. ## Understanding your results The example surplus falls from £120,000 to £75,000. This simple appraisal does not model discounted returns, borrowing drawdowns or market value; those need separate analysis. ## How it works The workbook provides blank working records. Grey cells calculate from the entered inputs; yellow cells are for your information. The completed example stays on this page. Read the [related guidance]() for the context and checks behind this template. If you need help preparing or reviewing the project records, our [quantity surveying services]() explain the tasks available under a separate appointment. Agree the deliverable, responsibilities and required specialist input before work starts. [Browse the Library]()