Over 25 years' industry experience
In-house technical support
Widely accepted by UK lenders



Build-Zone was created as a 10-Year Structural Warranty provider in 2003 and is a trading style of Sennocke International Insurance Services Limited, which was established in 1990. We are experienced in underwriting Warranties for all types of developments, from a single unit new home warranty to a large, residential or Commercial Latent Defects Insurance. Whatever your project, we can help provide the 10-Year Structural Warranty or home warranty services you need.


With years of experience, Build-Zone understands the importance of providing the right level of support throughout the build process, and our experienced team of account handlers will assist with any queries from the time of your application until completion of your project, to ensure everything runs as smoothly as possible.


Build-Zone Survey Services Ltd (BZSS), our in-house dedicated technical services resource company, arranges the 10-Year Structural Warranty technical audits using a network of independent, qualified surveyors and approved inspectors. They can also facilitate building control via the approved inspector network, which can result in substantial savings for the customer, both financially and for convenience.




As well as our warranty product range, we are also able to arrange other insurances, such as contractors’ all risks, professional indemnity, public and employers’ liability and insurance backed guarantees. We also provide services such as construction insurance and Japanese knotweed insurance, as well as a range of technical services including air pressure testing and EPC tests. Please contact us for more details.

Build-Zone and Self-Build Zone are trading styles and Build-Zone Survey Services Ltd is a wholly owned subsidiary of Sennocke International Insurance Services Ltd. Sennocke is the scheme administrator of the Build-Zone range of warranties and is authorised and regulated by the Financial Conduct Authority.


The need for a structural warranty is paramount when you’re working on residential, mixed-use or commercial development projects. Individuals buying the property using a lender or a mortgage will require a lender-approved structural warranty. We want our customers to not only benefit from our great service but also from us only using A-rated insurers to help make sure you’re always covered. 

We provide A-rated latent defects cover to suit the unique requirements of your development or project, including new home warranty and warranties for residential developments. This also includes residential, social housing, mixed-use and larger commercial developments. With the backing of an A-rated insurer, you receive peace of mind from a dependable organisation that provides help when you need it most and for the full-length of your policy. 

Over the years we have seen many unrated insurers leave the market leaving their customers with no cover and the need to repurchase a warranty at their own cost, the most recent is Alpha. We’re here to provide the support and insurance coverage you need to see it through, no matter your project and with the peace of mind of our A-rated backing that your cover is protected.


If you have bought a home benefiting from a Build-Zone Warranty, you can be secure in the knowledge that it has undergone a thorough technical audit process to ensure it is constructed to the standard required by Build-Zone. However, if anything goes wrong and a defect appears, Build-Zone will help you through the claims process. For more information please visit our home buyer warranty page.