The Maxi is our best selling garden room, hand-built with care by our skilled carpenters using the highest quality materials, fully insulated, and finished externally to an exceptional standard.
Maxi
| Size | W 5.0m x D 3.5m x H 2.5m |
| Price | From £22,758 (incl. VAT) |
| Installation Time | 2 weeks |
Design your own Maxi
Adjust the size, doors, finish and more, and get your price instantly.
Specification
| Standard specification |
|---|
| Size: Maxi. 5.0m W x 3.5m D x 2.5m H external. Customise the size in our configurator. |
| Engineered insulated panels (100mm PIR insulation) with traditional timber framing |
| Insulated steel roof panel system |
| 2.2m full-height UPVC sliding door (smooth anthracite grey outside, white inside) |
| 1 full-height window (0.6m wide, with top opener) to the front |
| Premium composite cladding to the front; anthracite cladding to the sides and rear |
| Vinyl oak flooring |
| Melamine wall finish (upgrade to a fully plastered and decorated interior available) |
| Contemporary skirting board, primed and painted white |
| Medium electrical package included: 4 double sockets, 3 LED panel lights, 1 external up/down light, consumer unit, 1.5kW radiator (1st and 2nd fix). Mains connection to the house is a provisional allowance (typically £1,000 to £2,000), confirmed by our registered electrician after a site survey and adjusted to the actual cost. |
| Ground screw foundation included (deduction available if you have an existing concrete base) |
| 10 year structural warranty |
| Right or left-hand configuration and bespoke door/window layout. Design yours on our configurator. |
| Price (incl. VAT): From £22,758. Build your exact spec and price in the designer. |
Price includes delivery, ground screw foundations, installation and VAT.
Price excludes electrical connection (subject to survey).
Options and Upgrades
| Option | Price |
|---|---|
| Any size, 3.3 to 8.8m W x 2.4 to 4.6m D | Configured in the designer |
| Premium plastered and decorated interior finish | From £4,586 |
| Internal partition wall | From £1,605 (+ £500 with a connecting door) |
| Extra sliding door | £1,200 |
| 0.9m single door (clear or frosted glass) | £1,050 (frosted + £50) |
| Full-height windows (0.6m / 0.9m, optional top opener), standard and slot windows | From £500 |
| Composite slatted cladding to the sides | £100 per m² |
| Western Red Cedar cladding (front or sides) | £200 per m² |
| Signature canopy / decking feature | + 5% |
| Composite decking | £300 per m² (plus £900 starter) |
| Side privacy screens (require canopy and decking) | £425 per side |
| Electrical package upgrades and add-ons | Configured in the designer |
| Mains electrical connection (via our registered electrician) | Provisional £1,250 (typically £1,000 to £2,000) |
| Data cabling | £550 |
| Air conditioning (heating, cooling, dehumidifying) | £1,750 |
| Extra external up/down lights | £95 each |
| Weatherproof external double sockets | £235 each |
| Increase building height to 2.75m or 3.0m | + £1,955 / + £2,956 |
Speak to the garden room experts
Looking to start your garden building project or have any further questions?
We specialise in Garden Rooms in South East London, Kent, Surrey, and East/West Sussex.
Call us: 01689 818 400
Email us: info@gardenofficebuildings.co.uk
Our Kent showroom is open Mon-Sat by appointment
Why choose us?
- We only work locally in the South East of England – SE London, Kent, Surrey, East/West Sussex
- Premium construction materials used, including 100mm PIR insulation to ensure building can be used all-year round
- 55+ years experience in the garden building industry
- Passionate about what we do
- We have a showroom where you can view our buildings in-person
Design your own Maxi
Adjust the size, doors, finish and more, and get your price instantly.
Get Started
Click the button below to get started and we’ll organise for one of our team to get in touch.


