Dorset Extensions and Garden Rooms in Weymouth, Dorset

How Much Do Garden Room Extensions Cost in Weymouth?

Weymouth, with its beautiful coastal scenery and charming ambiance, is a perfect place to enjoy outdoor living spaces. Many homeowners are exploring ways to enhance their homes, and garden room extensions have become a popular choice. But how much do these extensions cost? And how do they compare to traditional home extensions? Let’s dive in.

Understanding Garden Room Extensions

A garden room extension is a versatile, standalone structure typically located in the garden. It can serve various purposes such as a home office, studio, gym, or guest room. These structures are known for their flexibility and aesthetic appeal, blending the indoors with the outdoors seamlessly.

Cost of Garden Room Extensions in Weymouth

The cost of a garden room extension in Weymouth can vary based on several factors:

  1. Size and Design: Larger garden rooms with intricate designs and high-end finishes will cost more. On average, a small, basic garden room might start around £10,000, while a more extensive, luxurious version can exceed £30,000.

  2. Materials: The choice of materials impacts the cost significantly. Timber frames, insulated panels, double-glazed windows, and high-quality roofing materials will increase the price but also enhance durability and comfort.

  3. Utilities and Amenities: Including plumbing, electricity, heating, and internet connectivity will add to the cost. Basic garden rooms without these utilities might be cheaper, but adding these features ensures year-round usability.

  4. Professional Installation: Hiring experienced builders and designers in Weymouth will influence the total cost. DIY kits are available and more affordable, but professional installation ensures quality and adherence to local building regulations.

On average, homeowners in Weymouth might spend between £15,000 and £25,000 for a well-equipped garden room extension.

Traditional Home Extensions

A traditional home extension involves adding extra rooms or living spaces to your existing house. This type of extension is more integrated with the main house and can include bedrooms, living areas, or expanded kitchens.

Cost of Traditional Home Extensions in Weymouth

Traditional home extensions tend to be more expensive due to their complexity and the need for seamless integration with the existing structure. The factors influencing the cost include:

  1. Size and Scope: A single-story extension might cost between £1,500 to £2,500 per square meter. For a double-story extension, costs can rise to £2,000 to £3,000 per square meter.

  2. Materials and Finishes: High-end materials, bespoke fittings, and premium finishes will increase costs. However, even standard materials can add up depending on the size of the extension.

  3. Labor and Professional Fees: Hiring architects, surveyors, and builders adds to the expense. Local regulations and planning permissions also play a role, potentially adding to the timeline and cost.

  4. Utilities and Structural Work: Integrating new plumbing, electrical systems, and heating with the existing infrastructure can be complex and costly.

For a typical single-story extension, homeowners in Weymouth might expect to pay between £30,000 and £50,000, while a more extensive or double-story extension could exceed £100,000.

Garden Room vs. Traditional Extension: A Comparison

Cost: Garden rooms are generally more affordable, starting around £10,000, compared to traditional extensions that can start from £30,000.

Purpose and Flexibility: Garden rooms offer versatility and can be used for various functions. Traditional extensions, while typically used to add more living space, provide a more integrated and permanent solution.

Installation Time: Garden rooms are quicker to install, often completed within a few weeks. Traditional extensions can take several months due to the complexity and need for planning permissions.

Property Value: Both can add value to your property, but traditional extensions usually offer a higher return on investment as they add to the overall square footage of your home.

Disruption: Garden rooms cause minimal disruption to your daily life during installation. Traditional extensions involve significant construction work, which can be intrusive and lengthy.


Choosing between a garden room and a traditional home extension depends on your budget, needs, and long-term plans. For those in Weymouth looking to enhance their living space without the high costs and disruptions of a traditional extension, a garden room offers an attractive and flexible solution. However, if you seek to significantly increase your home’s living area and value, a traditional extension may be the better investment. Whichever you choose, both options can beautifully complement the charm and appeal of your Weymouth home.

Read more about our Garden Rooms and Services we offer in Weymouth.

Need Electrical work? Speak to the experts at Dorset Extensions Electrical.

Covering: Weymouth, Dorchester, Dorset, Portland, Wareham

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07377 908042

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