Instant Price Calculator

Build Your Price

10 questions. Real pricing. Instant guide total.

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What size would you like your build?

Enter your desired width and depth in metres. We build to the millimetre so you can be as precise as you like.

Desired Width in Metres

Desired Depth in Metres

Total floor area 12.000 m²

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Structure

Choose your roof style. Note: within 2m of a boundary, maximum height is 2.5m.

Standard height, flat roof

Standard height, flat roof 2.5m high

Single Pitch Extended height

Single Pitch Extended height 3m high, 2.5m to eaves

Dual Pitched Roof

Dual Pitched Roof 2.5m high

Dual Pitch Extended height

Dual Pitch Extended height 4m high

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What Visual Cladding would you like?

Choose the external cladding finish. The number of walls to clad is selected in the next step.

Thermo Ayous Light hardwood · 30yr+ lifespan

Thermally modified hardwood with a light, honey-blonde tone. Stable and low-movement with excellent dimensional stability — 30+ year lifespan with minimal upkeep.

Western Red Cedar

Western Red Cedar Classic warm timber · 30yr+ lifespan

Classic warm reddish-brown timber that weathers naturally to silver-grey if left untreated. Naturally rot and insect resistant with a 30+ year lifespan.

Charred Spruce Shou Sugi Ban dark finish · 40yr+

Inspired by the Japanese Shou Sugi Ban technique — charred to create a near-black, tactile finish. Extremely durable, fire resistant and pest resistant with a 40+ year lifespan.

Hardie® Plank Fibre cement · zero maintenance · 50yr+

Fibre cement board that never rots, warps or cracks. Fully paintable in any colour, zero maintenance, and carries a 50+ year product warranty.

Millboard® Premium composite · 50yr+ · no maintenance

Premium composite engineered to look like natural hardwood. Completely waterproof, splinter-free and requires zero maintenance — 50+ year lifespan, ideal for contemporary or coastal settings.

Thermo Ash Dark hardwood · 30yr+ lifespan

Thermally modified ash with a rich, dark chocolate tone. Dense, durable and stable with a 30+ year lifespan — a refined alternative to cedar.

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How many walls would you like cladded in Visual cladding?

Select how many walls get the premium finish. 1 wall = front face only.

1 wall 2 walls 3 walls 4 walls

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Features

All optional. Select any you'd like included. Click each to see a photo.

Canopy Full-width canopy over the entrance

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Side canopy walls

Side canopy walls Side returns on the canopy (requires canopy)

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Hidden Storage Room

Hidden Storage Room Built-in storage compartment at the rear

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Glass corner Full-height frameless glass corner

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Skylight (90×120cm)

Skylight (90×120cm) Flush aluminium rooflight

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Would you like any premium Millboard® Decking?

Composite decking outside the entrance. Enter the deck dimensions if yes.

Decking

✕ Not required ✓ Yes please

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Electric Options

All rooms include full electrics, sockets, lighting and consumer unit. These are optional upgrades.

External Up/Down Lights

External Up/Down Lights Outdoor up/down wall lights

+£240

Canopy Downlights

Canopy Downlights Recessed lights in the canopy soffit

+£280

LCD Smart Switch

LCD Smart Switch Smart wall switch for scene control

+£75

WiFi / Cat 6a Hard-wired internet and data points

+£550

External Smart Socket

External Smart Socket Weatherproof outdoor socket

+£145

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Climate control

All rooms use SIPs insulation. For year-round use most customers add at least a heater.

None SIPs keeps the room warm — add your own plug-in heater

Included

2.5kW Air Conditioning

2.5kW Air Conditioning For rooms up to ~25m² — heats and cools all year

+£1,860

5kW Air Conditioning

5kW Air Conditioning For larger rooms or heavy use

+£2,740

Smart Heater Panel

Smart Heater Panel Thermostat-controlled panel heater, fitted and wired

+£330

Final step

Where are you based?

We use your postcode to tailor the price to your location and confirm we cover your area. We'll send your full breakdown to your inbox.

Option preview

Full installation included

All electrics & sign-off

No hidden extras

5 stars · 39 Google reviews

150+ garden rooms built

Call 01932 640242