Details

We will remove this tool on 31 March 2026 because it relies on technology that is no longer supported. You can continue to use the tool until this date. Email DatEnquiries@homesengland.gov.uk if you are significantly affected by this change.

The development appraisal tool is intended for use on small and medium to medium/large size schemes with a development period of up to 15 years.

The tool can be used to:

• analyse whether the level of required planning obligations is viable
• help local authorities consider the balance between affordable housing and other planning obligations
• assess the case for financial support from the Homes England under the Affordable Homes Programme
• assess the potential land value where a local authority is considering a disposal
• bid for the development of public land under the agency’s Delivery Partner Dynamic Purchasing System

A bid comparator is available to help compare a number of submissions and their assumptions.

Version 4.02 of the model has 5 phases for all tenures and infrastructure, to enable modeling of longer term schemes.