Property Rebuilding costs - how to calculate and avoid underinsurance

Underinsurance is something that all landlords should try to avoid. One element to consider when purchasing your landlord insurance policy is the cost of rebuilding your property should the worst happen.

Helpfully, the Association of British Insurers has commissioned a free tool to help you calculate the rebuilding cost, to help provide you with the details to select the cover you need as a landlord. The Building Cost Information Service (BCIS) of the Royal Institution of Chartered Surveyors (RICS) produces a range of detailed guidance on the cost of rebuilding houses and flats. The Association of British Insurers (ABI) has commissioned BCIS to provide general guidance to help you check the adequacy of your sum insured.

You can access the calculator here:

This provides general guidance on the rebuilding cost of houses and some types of flats to the general public. If you require the rebuilding cost for commercial purposes, either as a surveyor, part of the insurance industry or to manage a group of properties then you should be using one of the BCIS subscription services. You can find details of services for the insurance industry at and services for the surveying profession at

You need to register before using the calculator. As a part of the registration process you must accept the terms and conditions of use. Once registered, you will be able to use the calculator four times in any 12 month period. Please refer to the notes on this site, which provide important information on your rebuilding cost.

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