Insulation is often hidden behind finishes. Keep evidence while the work is happening.
Show what was installed
Keep product information, invoices and photos. Record the material, location and available insulation specifications.
Cost is not the same as market value
The appraiser considers the whole home. There is no fixed guaranteed return per square metre. For a value after renovation, provide clear plans and quotations.
Useful tools
Open the calculators or build your document checklist. Request an appraisal when you know the report requirement.
Sources
Sources checked on 9 October 2026.