Garden Rooms in Carshalton that add real, usable space—without moving home. From quiet home offices to gyms and studios, we build fully insulated rooms finished to a premium standard. Typical installs take 2–4 weeks, with clear pricing and tidy site management.
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Carshalton’s mix of leafy streets and character homes makes garden buildings a smart way to gain space without altering the main house. Whether you’re near Carshalton Ponds or closer to Carshalton Beeches, a bespoke garden room can become a calm office, creative studio, or family hangout. We design around how you’ll use the room day-to-day, then match the look to your garden. Every build is fully insulated for comfortable use in all seasons.
Many properties across SM5 include Victorian and Edwardian houses, 1930s semis and other period homes with established gardens. That often means mature planting, tighter side access and existing patios that need protecting. We plan layouts that respect boundaries, sightlines and neighbouring properties, while keeping the room practical for modern living. If you’re in Hackbridge or Wallington, we’ll also factor in access routes, deliveries and parking from the outset.
Our process starts with a site visit and a clear, itemised proposal—no vague allowances. We handle groundworks, insulation, electrics and finishing so you’re not juggling multiple trades. You’ll get a realistic programme, daily site care and a clean handover, ready to furnish. Local homeowners choose us for consistent communication, precise workmanship and a build that feels like a natural extension of the garden.
Across the London Borough of Sutton, gardens can vary from heavier clay to mixed made ground, so we specify foundations and drainage to suit. In Carshalton, side access can be limited on older plots, so we plan deliveries, storage and waste removal to keep disruption down. We also consider proximity to boundaries and neighbouring windows when positioning doors and glazing. If approvals are needed, we’ll help you prepare the right information for the local planning team.
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Most garden rooms in the Carshalton area fall between £10,000 and £40,000, depending on size, specification and access. A typical fully insulated room with electrics and quality finishes is often £15,000–£25,000. Costs rise with larger footprints, extensive glazing, bathrooms/kitchenettes, premium cladding, or more complex groundworks. We provide an itemised quote after a site visit so you can compare like-for-like.
Most builds take 2–4 weeks from start on site to handover, depending on the design and what’s included. Ground conditions, drainage, and the need for deeper foundations can add time, as can bespoke joinery, large glazing units, or specialist finishes. Access also matters—narrow side passages may require smaller deliveries and more manual handling. We agree a realistic programme before work begins and keep you updated throughout.
Many garden rooms can be built under permitted development, provided they meet limits on height, position and how much of the garden is covered. However, rules can differ for listed buildings, flats, maisonettes, or properties with restrictions, and electrics/plumbing may introduce extra considerations. We’ll review your site in Carshalton and flag any likely constraints early. If permission or a lawful development certificate is sensible, we can guide you through it.
We provide a 10-year warranty covering our workmanship and the structural build elements, giving you long-term confidence in the installation. This includes key construction components such as the frame, insulation build-up and weatherproofing details, when maintained as advised. Manufacturer warranties apply to specific products like doors, windows and roofing systems. At handover, we explain care requirements and provide documentation for your records.
You can choose from contemporary or traditional designs, including timber or composite cladding, painted render finishes, and a range of door and window styles. Popular options include slimline aluminium bi-folds, rooflights for extra daylight, and integrated heating for year-round comfort. Internally, we can fit acoustic upgrades, built-in storage, and durable flooring suited to gyms or studios. We’ll help you select finishes that suit your home and garden setting.
Get your free, no-obligation quote today.