Warm Homes Stamp Duty Incentive Calculator

An interactive page illustrating how a Warm Homes Stamp Duty Incentive could work and designed to encourage homeowners and buyers towards low-carbon upgrades.

Retrofit Policy Document

The Warm Homes Stamp Duty Incentive is a proposal to transform the retrofit market by linking Stamp Duty Land Tax to a home’s energy performance and offering rebates for post-purchase efficiency improvements. It is designed to encourage millions of homeowners and buyers towards low-carbon upgrades, unlocking billions in private investment and accelerating the UK’s journey to net zero.

Access the calculator here

This online tool brings the Incentive to life. It takes the user on a journey as a prospective homebuyer, showing how a simple reform to Stamp Duty could reshape the choices we make about the energy performance of our homes. It walks you through the process as you select a house type and price, then, after the stamp duty has been calculated, you can add upgrades like insulation, heat pumps, or double glazing to explore how this home could be improved, and discover how much rebate you’d get back.

The calculator is not to be used as a tool for stamp duty calculation – it’s a concept illustration of how policy reform could transform the housing market. It is aimed at showing policymakers and campaigners how a modest adjustment to Stamp Duty can help homebuyers value energy efficiency, plan upgrades at the point of purchase, and accelerate the UK’s journey to warmer, lower-cost, low-carbon homes.

Policy & Advocacy

Since 2007, we have been bringing together some of the most influential leaders in politics, business, local authorities, civil service and NGOs to accelerate action for a green built environment.

Learn more