Cost: accessible roof terrace
The visible surface is only part of the project. Compare design, structural adaptations, waterproofing, protection, access and safety measures, then finishes. Distinguish a new terrace from a change of use on an existing roof and clarify exclusions.
Editorial update on 18 September 2026
Separate creation and conversion
Itemise survey, design, permissions, possible strengthening and roof alterations. A paving-only offer does not price an entire conversion.
Compare complete assemblies
Request areas, surface, supports, protection, waterproofing and junctions. Distinguish retained and new work. Check threshold and outlet changes needed for the final level.
Include access and follow-up
Price permanent access, guardrails, lifting, construction protection, waste and handover. Clarify planned removability for later repairs and maintenance services.
The three budget levels
Where your money goes
- DesignOn quotationUse, structure and levels.
- RoofOn quotationWaterproofing, protection and outlets.
- TerraceOn quotationSupports and surface.
- AccessOn quotationRoutes, guardrails and site work.
What makes the price vary
Project
New construction or changed use.
Loads
Assessed equipment and adaptations.
Levels
Thresholds and final build-up.
Access
Delivery, use and maintenance.
Indicative scenarios
No grant is deducted from the budget shown here. If a quote mentions support, request the exact scheme and confirmation of your eligibility before including it in financing.
Frequently asked questions
Can I simply lay paving on my roof?
First assess structure, roof build-up, drainage, access and protection for the project.
Is a new membrane sufficient?
No. It does not approve loads, access safety or support compatibility.
Can I add planters later?
Have their location and loads confirmed before adding them. A terrace is not approval for any equipment.
Must all existing waterproofing be replaced?
That depends on assessment and compatibility with the proposal, not just a surface change.
Your exact price, in 2 minutes
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