Cheapest Home Extension That Can Add £20,000 to Your House Price Wednesday, June 24, 2026 home extension garage conversion home gym property value loft conversion bedroom addition house renovation return on investment real estate value increase Converting your garage into a home gym emerges as the most cost-effective home extension, capable of adding up to £20,000 to your house price. This practical and popular renovation requires an investment of around £10,000 but … Read More