Extend, without breaking the bank

Jigsaw • 31 August 2021

When it comes to finding more space to live, you could move, but taking into account the costs of moving (stamp duty, conveyancing, moving companies) let alone the stress of the process and the need for greater affordability to get more space, moving isn’t always an option.

But adding space to your current home could be a more affordable option than you may think. On average, a single storey extension, on a budget, can be built for between £30,000 - £50,000, but this can exclude fitting costs. Let’s explore some of the options and considerations...

Consider your space

When it comes to planning an extension, our advice is to always get an expert in before you start spending money. You may have come up with an option, but it doesn’t necessarily mean it will be the best option, in terms of build program, cost and usable space.

Rear extensions

One of the most popular extension choices is to add a simple square/rectangular extension to the rear of the home, usually from a kitchen, to create a great social space. This type of extension will always add value to your home, but it will also create a functional and enjoyable space. One of the many reasons it proves so popular is that an extension of this type will usually not require planning permission due to the nature of build, but again, it is always worth consulting with an expert before you begin to ensure you don’t fall foul of any planning restrictions.

To create a quality space, with features such as Velux windows and bi-folding doors, plus quality design features externally (such as slate or cladding), this type of extension would come in under a budget of £50,000, without compromising on the quality of products used.

Merging old with new

One of the challenges of an extension can sometimes be how to stylishly combine the two spaces so that the extension feels like part of the room, rather than an add-on. If the property is slightly older in style, this problem can be exaggerated. One flawless way of achieving this would be to intentionally introduce new style and design. A glazed feature (such as a glass atrium or ceiling) in between the old and the new space could define the two, and by embracing ‘modern’ materials, such as steel and masonry, you could create something entirely new, and within budget.

An alternative approach would be to add a glass box as your extension. Again, if your property is older or more characterful, adding a complete contrast with a glass box can be a real stylish statement. An extension like this instantly injects natural light to a property for an added bonus.

A step to the side

Like rear single-storey extensions, side extensions prove popular thanks to the fact that, in most cases, they do not require planning permission.

They can be an extremely cost-effective way of adding space and, as they don’t necessarily back on to the garden, the rooms can be more flexible in use, such as a ground floor bathroom, study, or guest suite. Whilst rear extensions are great for bringing the outdoors in, if that doesn’t suit your requirements, a side extension might be preferable.

Conservative use of space

Conservatories have really advanced in terms of style and quality, and what might have been an excellent addition to your home in the 80’s or 90’s, might now be making your home less energy efficient and not offering the optimised space that you need. By removing a conservatory and using the space for a single-storey extension, you would not only make your home more energy efficient, but you’d instantly add value and create more usable space year-round.

For further details on the types of extension that do not require planning permission, check out our recent blog: https://localbis.wixsite.com/jigsaw/post/making-changes-without-planning-permission

As ever, if you’re planning on starting an extension, or are considering the options available to you, we’d be happy to share our advice. Please always consult a professional before making changes to your home.

by Lisa Woolnough 1 May 2026
Not sure how to choose the right builder? Discover expert tips to avoid stress, delays, and hidden costs on your Surrey renovation.
by Lisa Woolnough 20 April 2026
As the weather warms up and daylight stretches into the evening, many homeowners start looking at their outdoor space differently. That unused garden suddenly feels full of potential, whether it’s for relaxing, working, or entertaining. In 2026, one trend is leading the way in home improvement: garden rooms and outdoor living spaces . From stylish home offices to seamless indoor-outdoor extensions, these upgrades are no longer a luxury, they’re quickly becoming a must-have for modern living. If you’re considering a garden room in Surrey or exploring outdoor living ideas in the UK , here’s what you need to know before getting started. Why Garden Rooms & Outdoor Living Are Trending in 2026 Homeowners are rethinking how they use their space, and the garden is no longer an afterthought. Here’s why demand is growing: Flexible living - Garden rooms double as offices, gyms, or guest spaces Working from home - A dedicated garden office creates separation from the house Lifestyle upgrades - Outdoor kitchens and entertaining areas are increasingly popular Added property value - Well-built outdoor spaces can significantly boost appeal Combined with better weather in spring and summer, April is when these ideas start turning into real plans. Garden Rooms vs Extensions: What’s Right for Your Home? One of the most common questions homeowners ask is whether to build a garden room or extend their home. Garden Rooms Best for: Home offices Studios or gyms Additional flexible space Benefits: Usually quicker to build Often fall within permitted development Less disruption to your home Home Extensions Best for: Expanding kitchens or living areas Creating open-plan layouts Long-term structural changes Benefits: Fully integrated with your home Adds significant long-term value Ideal for larger transformations The Key Decision If you want a separate, flexible space , a garden room is ideal. If you want to transform how your home flows , an extension may be the better option. Many homeowners are now combining both, creating indoor-outdoor living spaces that connect seamlessly to the garden. Costs & Planning Considerations When planning a garden office build or outdoor living project , it’s important to think beyond the structure itself. Typical considerations include: Size and specification of the build Electrical connections and heating Ground conditions and access Materials and finishes Planning permission Many garden rooms fall under permitted development, but this depends on: Height and positioning Proximity to boundaries Intended use For larger builds or integrated outdoor spaces, planning approval may still be required. Starting early in spring gives you time to confirm all requirements before construction begins. Why Groundworks & Timing Matter A successful outdoor project starts below the surface. Proper groundwork is essential for: Stability and longevity Drainage and weather resistance Preventing future movement or damage April is an ideal time to begin: Ground conditions are improving after winter Weather is more predictable Projects can progress smoothly into summer Starting now ensures your space is ready when you want to use it most. Creating Seamless Indoor-Outdoor Living One of the biggest trends in patio and extension design is creating a natural flow between inside and outside. Ways to achieve this: Bifold or sliding doors opening onto patios Matching flooring levels between interior and exterior Covered outdoor seating areas Integrated lighting and landscaping The goal is simple: A space that feels connected, not separate. This approach works particularly well for: Kitchen extensions opening onto the garden Entertaining areas for summer Family-friendly, open-plan living Is a Garden Room Right for You? A well-designed garden room or outdoor space can completely change how you use your home. It’s not just about adding space; it’s about creating a better way to live, work, and relax . Whether you’re considering a garden room in Surrey , a garden office build , or a full indoor-outdoor transformation , the key is starting with the right plan. Start Your Outdoor Living Project with Confidence At Jigsaw Construction Surrey , we help homeowners create high-quality outdoor spaces built to last, from initial planning through to final finish. With the right groundwork, clear design, and expert construction, your garden can become one of the most valuable parts of your home. 👉 Get in touch today to start planning your garden room or outdoor living project.
by Lisa Woolnough 1 March 2026
Thinking about renovating your home this year? Discover why March is the perfect time to plan your home renovation and avoid delays before summer.
More posts