Is it true that adding square footage to your property guarantees increased value?

Investing in a property extension can increase your home's value—but it’s not guaranteed. Success depends on balancing costs and ensuring the extension enhances your property. Here’s what you need to know:

• A well-designed and well-finished extension usually adds value.
• Overspending can reduce potential profits, while cheap finishes may negatively affect quality and appeal.

• Extensions can increase both size and desirability if done thoughtfully. Poorly planned extensions, however, may reduce appeal and even value.
• Nationwide research shows extensions on a typical three-bedroom home can add up to 23% to property value, equating to a £64,860 increase on the UK average house price of £282,000 (2024 figures).

• The average UK extension costs between £45,000 and £75,000.
• Major expenses include groundwork, foundations, and structural work—critical for long-term success. Avoid cutting corners here, as cosmetic upgrades like tiles can be changed later.

• Even if it’s your 'forever home,' consider resale value to maintain equity.
• Don’t overspend on fittings and finishes at the cost of structural quality.

• Struggling to decide between extending or moving? Consult a property expert to evaluate your home's current and potential value