Garden Rooms Merton

Name: Garden Office Buildings
Address: Rear of 158 Main Road, Biggin Hill, Kent, TN16 3BA, GB
Telephone: 01689 818 400
Price range: ££

Bespoke garden rooms, offices, gyms and studios designed and built for Merton homes. Family company, 1,000+ builds since 2004.

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Garden Rooms Merton

Bespoke garden rooms for Merton’s Edwardian and interwar family homes. Garden Office Buildings has been transforming SW19 gardens for over twenty years.

Merton is a genuinely rewarding part of South West London, combining tree lined streets, generous gardens, and strong transport links into central London. From the handsome Edwardian semis along Dorset Road and the conservation area streets of Merton Park to the interwar family homes near Cannon Hill Common, this is an area where properties have the outdoor space to make a garden room a practical and valuable addition.

We are a family run company based in Biggin Hill, and we have been designing and building bespoke garden rooms across SW19 for over twenty years. Whether your home is a John Innes built villa on one of Merton Park’s tree lined avenues or a 1930s semi backing onto Morden Park, we will build something that fits your garden, your property, and your requirements exactly. No flat pack kits, no subcontractors you have not met.

Our showroom in Biggin Hill is well worth a visit. You can walk through finished buildings, feel the quality of the materials, and talk to the team who will actually be building your garden room. We handle everything from foundations to electrics, and every project is completed to the same high standard.

Have a look at our buildings and prices page for a clear breakdown of what is possible at each budget. We are always happy to arrange a free site visit and talk through your plans face to face.

Save £5,000 with our Ambassador Programme. Allow us to photograph your completed garden room and host up to 3 visits from prospective customers (by appointment only). Learn more.

Enduring Build Quality for Merton’s Period Homes

Garden Office Buildings does things differently. Have a look at the fascia, soffits, trims, and rear cladding on any of our builds. These are proper structures, put together on site by experienced carpenters. We don’t do flat-pack.

With over 1,000 builds completed, we’ve had plenty of time to get every detail right.

What You Get With Us

Skilled Carpenters – Teams of 2 to 3 working on site for 3 to 6 weeks
No Corners Cut – Your garden room is built properly, full stop
100mm PIR Insulation – Keeps your building warm in winter and cool in summer
Double-Glazed Windows – Secure, attractive, and energy efficient
Made for Your Space – Every building is designed to fit your garden and lifestyle
Free Consultations – We’ll visit your home and give honest advice, no hard sell
Our Own Installers – We never subcontract the build to anyone else

We cover Merton and all the surrounding areas including Wimbledon, Mitcham, Morden, Raynes Park.

Garden Gym, Merton

A secondary school headteacher living in a four bedroom Edwardian semi on Mostyn Road in Merton Park wanted a dedicated home gym he could use before the school day. He had been paying for a membership at a Wimbledon gym but found he rarely went during term time. His south facing rear garden was around 18 metres deep with mature hedging on both sides, giving us plenty of room for a 5m x 3.5m build.

We fitted heavy duty rubber flooring throughout, a ceiling mounted pull up bar, and full height glazing along the front elevation to bring in morning light. The electrics include a 32 amp supply for a commercial treadmill, underfloor heating for winter sessions, and a wall mounted air conditioning unit. The exterior is finished in Siberian larch with a natural oil treatment that will weather gracefully alongside the established garden planting.

He told us the gym has completely changed his mornings. He is training five days a week before leaving for school, and his wife has started using the space for Pilates in the evenings. The building sits comfortably in the garden without encroaching on the lawn where their children play, which was a key concern from the start.

Garden Studio, Merton

A freelance textile designer working from her dining table in a Victorian terrace on Pelham Road needed a proper studio where she could spread out her fabrics, set up her industrial sewing machine, and host occasional workshops. The garden was a good size for a terraced property at around 14 metres deep, with side access through a passage from Kingston Road. We built a Multi at 6.5m x 4m, giving her a generous open plan workspace with a separate storage area partitioned at the rear.

We installed a Belfast sink with hot and cold water plumbed from the house, extra wide double doors for moving large rolls of fabric in and out, and adjustable LED track lighting so she can assess colours accurately. The walls were finished in plain white to serve as a neutral backdrop for her work. Two roof lights supplement the front glazing, ensuring even light throughout the day.

She moved into the studio within days of handover and has since hosted three weekend workshops for local makers, each with six to eight participants. She says the space has transformed her business and her creative output. Several neighbours along the street have asked for our details after seeing the finished building from their back gardens.

Get in Touch

Thinking about a garden room? We’re happy to help.

We build garden offices, studios, gyms, annexes, and multi-use buildings across Merton and the surrounding areas. Our service covers South West London, Kent, Surrey, and Sussex.

Call us: 01689 818 400
Email: info@gardenofficebuildings.co.uk
Showroom visits available Monday to Saturday by appointment

Why Customers Choose Us

We’ve been building garden rooms across South West London for over 20 years, including in Wimbledon, Mitcham, Morden, Raynes Park

All our buildings use 100mm PIR insulated panels, which outperform standard rockwool by a wide margin

Over 55 years of combined experience in the team

We care about getting the details right

Visit our showroom to see the quality for yourself and chat about your plans

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About Merton

Merton sits in the heart of the London Borough of Merton, between Wimbledon to the north and Morden to the south. The area is best known for Merton Park, a conservation area of tree lined streets developed by John Innes between 1870 and 1904, featuring handsome detached and semi detached houses with generous private gardens. Beyond the conservation area, the housing stock includes Edwardian terraces along Kingston Road, interwar family homes near Cannon Hill Common, and more modern developments closer to South Wimbledon. Merton Abbey Mills, a former fabric printing works on the River Wandle, now operates as a craft and food market.

Green space is plentiful. Morden Park, Cannon Hill Common, and the Wandle Trail provide excellent outdoor recreation, while Wimbledon Common is a short walk or cycle to the north. Transport links are strong: South Wimbledon station on the Northern line connects residents to the City in under 30 minutes, Merton Park tram stop links to Croydon and Wimbledon, and buses serve the surrounding areas of Mitcham, Raynes Park, and Colliers Wood. Properties here tend to have good sized rear gardens, often 15 metres or more, making them well suited for garden room installations.

Visit Our Showroom

From Merton, our Biggin Hill showroom is approximately 35 to 40 minutes by car, heading south east through Mitcham and Croydon or via the A232. It is a straightforward drive and well worth the trip to see our Midi, Maxi, and Multi models up close before making any decisions.

“We visited the showroom on a Saturday and were genuinely surprised by the quality. It is miles ahead of the flat pack options we had been looking at. The team explained everything clearly, gave us a fixed price, and the whole build was completed in under five weeks. Our garden studio is now the best room we own.” – Sarah and Tom, Merton Park SW19

garden office buildings banner at showroom

Frequently Asked Questions

How much does a garden room cost in Merton?

Garden rooms in Merton typically cost between £15,000 and £50,000 depending on size, specification and finish. Our Midi (4m x 3m) starts from around £15,000, the Maxi (5m x 3m) from around £20,000, and our Multi (6m x 4m) from around £30,000. Every quote includes groundwork, electrics and VAT with no hidden extras. See our buildings and prices page for full details.

Do I need planning permission for a garden room in Merton?

Most garden rooms in Merton fall under permitted development and do not need planning permission. The building must be single storey, no taller than 2.5 metres at the eaves, and must not cover more than 50 percent of the garden. If your property is in a conservation area or is listed, additional restrictions may apply. We handle planning guidance on every project.

How long does it take to build a garden room?

Our builds typically take 3 to 6 weeks on site depending on size and complexity. A standard Midi or Maxi takes around 3 weeks, while a larger Multi or bespoke build may take up to 6 weeks. We use our own teams of experienced carpenters and never subcontract.

Can I use a garden room as a home office?

Absolutely. A garden office is one of our most popular builds. Every garden room comes with 100mm PIR insulation, double glazed windows, full electrics and internet connectivity, making it comfortable and productive all year round.

Do Garden Office Buildings install garden rooms in Merton?

Yes, we regularly build garden rooms in Merton and the surrounding areas including Wimbledon, Mitcham, Morden, Raynes Park. We are based in Biggin Hill, Kent, and have completed over 1,000 builds since 2004. Call us on 01689 818 400 or visit our showroom.

Helpful Resources

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Whether you need a garden office, a creative studio, a home gym, or a family space, we’ll build something that works for you. Click below for your free quote.

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