21, The Square

Why Does This Property Have a F Rating?

This semi-detached house is located in CARSHALTON, SM5 3BN. The property offers 173m² (1862 sq ft) of spacious living space with 8 habitable rooms. It is a characterful interwar or early 20th century home. Currently rated F (33/100) for energy efficiency, this property would benefit significantly from energy improvements. With recommended improvements, it could achieve a C rating (78/100). The property uses electric storage heaters, which charge overnight on cheaper electricity tariffs. While having low installation costs, running costs are typically higher than gas central heating. A heat pump could reduce electricity use by 60-70%. The solid walls lack insulation. Solid wall insulation (external or internal) typically costs £8,000-£14,000 but can reduce heat loss by up to 35% and improve your EPC rating by 1-2 bands. The loft insulation is rated very good, meeting or exceeding the recommended 270mm depth for optimal thermal performance. Single glazing is a significant source of heat loss, accounting for up to 25% of a home's heat escaping through windows. Upgrading to double glazing typically costs £400-£600 per window but improves thermal comfort and can reduce noise by up to 30dB. Estimated annual energy costs are £2830, comprising £2473 for heating, £228 for hot water, and £129 for lighting. The property produces 18.0 tonnes of CO2 per year, which is high for a UK home. The property last sold in March 2021 for £973,379, with 2 recorded sales in our database.

Property Information

💷 Sales History

Note: EPC improvements typically add 3–5% per band to property value. Moving from F to C could add significant value.