The cost of a structural warranty in the UK varies depending on the type of project, its value, construction method, and the level of risk. There isn’t a fixed price, but the ranges below are typical.
| Project type | Typical cost (indicative) |
| Self-build home | £2,000–£5,000+ |
| Single new-build house | £2,500–£6,000+ |
| Small residential development (2–10 units) | £4,000–£20,000+ |
| Large housing developments | Quoted individually |
| Apartment blocks | Project-specific, often significantly higher due to complexity |
Factors that affect the price
The premium is usually based on a combination of factors, including:
- Build value – Higher-value projects generally attract higher premiums.
- Number of units – Multi-unit developments are priced differently from single dwellings.
- Construction type – Traditional masonry may be priced differently from timber frame, steel frame, or modular construction.
- Ground conditions – Challenging ground or contamination can increase risk.
- Project complexity – Basements, retaining walls, or unusual designs may affect pricing.
- Location – Local ground conditions and regional risk factors can influence costs.
- Experience of the builder or developer – A strong track record may support a more favourable assessment.
- Inspection requirements – The number and scope of technical inspections form part of the overall cost.
What’s typically included?
A structural warranty generally includes:
- A 10-year period of cover.
- Technical review of the design and construction.
- Site inspections during key stages of the build.
- Protection against defects affecting the structural integrity of the property, subject to the policy terms.
- Cover that is commonly accepted by many mortgage lenders, provided the warranty provider meets the lender’s requirements.
Is the cheapest option the best?
Not necessarily. When comparing warranties, it’s worth considering:
- Whether the provider is accepted by the mortgage lenders relevant to your buyers.
- The scope of cover and any exclusions.
- The quality of technical auditing and inspections.
- Claims handling and customer support.
- The provider’s reputation and financial backing.
A lower premium may come with different levels of cover, service, or acceptance, so comparing policies as well as price is important.
Getting an accurate quote
To obtain a tailored quotation, you’ll typically be asked for:
- The project address.
- The estimated build cost or reinstatement value.
- The number and type of units.
- Construction method.
- Proposed start and completion dates.
- Details of the builder or developer.
- Architectural drawings and, where available, structural engineering information.
Because premiums are assessed on the individual characteristics of each project, the most reliable way to determine the cost is to request a project-specific quotation f through a broker like Build Secure who can compare multiple options.