What is the Cheapest Way to Extend a House?

Extending your home is a great way to add space and increase property value, but what is the cheapest way to extend a house? With traditional builds often being expensive and time-consuming, many homeowners are now considering modular extensions as the best value-for-money solution.

Cost-Effective Home Extension Options

If you’re looking to extend your home on a budget, there are several cost-effective options to consider. Each extension type varies in price, time, and disruption levels, making it essential to choose the right one for your needs.

1. Modular Extensions – The Best Value for Money

Modular extensions are prefabricated structures built off-site and assembled quickly at your property. They are cost-effective, energy-efficient, and require minimal labour, making them significantly cheaper than traditional brick-and-mortar extensions.

Benefits of Modular Extensions:

• Affordable pricing – Lower labour costs and efficient material usage.
• Fast installation – Can be completed in weeks, not months.
• Minimal disruption – No prolonged on-site construction.
• High-quality materials – Built to UK building regulations.

Vergolus modular extensions offer affordable pricing and customisable designs, making them the perfect solution for homeowners looking to extend on a budget.

2. Timber Frame Single-Storey Extensions

Timber frame extensions are another budget-friendly option. Compared to traditional brick-built structures, they are lighter, faster to build, and more affordable.

Why Choose a Timber Frame Extension?

• Lower construction costs – Uses sustainable, cost-effective materials.
• Quick build time – Faster than brick-built alternatives.
• Energy-efficient – Naturally better at insulation.

3. Rear Extensions for Terraced Houses

If you own a terraced house, a rear extension can be the cheapest way to add extra space. By extending into your garden, you avoid complex groundwork and additional costs associated with side extensions.

How to Save Costs on a Terraced House Rear Extension

• Opt for a modular or timber frame build instead of traditional brickwork.
• Keep the design simple – Fewer structural changes reduce costs.
• Use standard materials rather than bespoke options.

4. One-Storey Side Extensions

A one-storey side extension is a great cost-effective solution if you have extra space on the side of your property. This type of extension is cheaper than multi-storey options and provides additional living space for kitchens, dining rooms, or home offices.

5. Garage Conversions

Converting an existing garage into a living space is one of the cheapest ways to extend a house since the structure already exists. This means you save on foundations and walls, significantly reducing costs.

6. Conservatories & Modular Garden Rooms

A conservatory or garden room can serve as an affordable alternative to a traditional extension. Modular garden rooms, in particular, provide extra space without major disruption and are cheaper than full extensions.

Cost Breakdown: How Much Does It Cost to Extend a House?

Average Costs of Different Extension Types

Extension Type	Average Cost (GBP)
Modular Extension	£25,000 – £50,000
Timber Frame Extension	£30,000 – £55,000
Rear Extension (Terraced House)	£35,000 – £60,000
One-Storey Side Extension	£40,000 – £70,000
Garage Conversion	£10,000 – £25,000
Modular Garden Room	£15,000 – £35,000

How to Save Money on Your Home Extension

• Choose modular construction – More affordable and faster than traditional builds.
• Keep the design simple – Avoid unnecessary customisations.
• Plan under Permitted Development (PD) Rights – Reduces planning permission costs.
• Use cost-effective materials – Opt for standard rather than bespoke finishes.
• Work with experienced professionals – Avoid costly mistakes and delays.

If you need a planning permission guide, then click to download a copy with free tips!

FAQs

1. What is the cheapest type of home extension?

A garage conversion is often the cheapest option since it uses an existing structure. However, modular extensions are the best value-for-money option for new builds.

2. Are modular extensions cheaper than brick-built extensions?

Yes! Modular extensions are 20-30% cheaper due to reduced labour costs and efficient off-site manufacturing.

3. Do modular extensions require planning permission?

Many modular extensions fall under Permitted Development (PD) Rights, but you should check local regulations to be sure.

4. How long does it take to build a modular extension?

Most modular extensions take 4–6 weeks from manufacturing to installation.

5. Can I extend my terraced house affordably?

Yes! A rear extension is often the cheapest way to extend a terraced house.

6. What is the most cost-effective way to add an extra room?

A modular garden room or garage conversion is an affordable way to add an extra room.

7. How much does a single-storey extension cost?

A single-storey extension typically costs between £25,000 – £70,000, depending on size and materials.

8. Is a timber frame extension cheaper than brick-built?

Yes, timber frame extensions are quicker, lighter, and more cost-effective than traditional brick extensions.

9. How do I finance a home extension?

You can use savings, home improvement loans, or remortgaging options to finance your extension.

10. How do I get started with a modular extension?

Contact Vergolus today for a consultation or request an information pack!

The Cheapest Way to Extend A House

If you’re looking for the cheapest way to extend a house, modular extensions are the best value-for-money option. They are faster, more affordable, and cause less disruption than traditional brick-built structures. Whether you choose a modular extension, timber frame extension, or rear extension for a terraced house, you can achieve your dream home extension without breaking the bank. At Vergolus, we specialise in cost-effective modular extensions tailored to your needs. Contact us today to explore how we can help you create the extra space you need—without the high costs of traditional construction.