Shire
Shire Mammoth Shiplap Workshop 30x12
Free delivery · 28 Days
See price and delivery at retailer →- Measured size
- 30 ft 3 in x 12 ft 11 in (9.22 x 3.94 m)
- Cladding
- Tongue and groove
- Floor
- Tongue and groove boards
- Roof covering
- Mineral felt
- Doors
- Double doors; position chosen as you build
- Guarantee
- 12 months parts
Specification
Size
| Nominal size | 30 x 12 ft |
|---|---|
| Measured size | 30 ft 3 in x 12 ft 11 in (9.22 x 3.94 m) |
| Floor area | 36.33 m² |
Walls and frame
| Cladding | Tongue and groove |
|---|---|
| Frame | 44 x 70 mm |
| Panels | Modular, each panel carries through a standard door |
Floor and roof
| Floor | Tongue and groove boards |
|---|---|
| Roof | Apex roof, tongue and groove boards |
| Roof covering | Mineral felt |
Doors, windows and security
| Doors | Double doors; position chosen as you build |
|---|
Treatment and guarantee
| Material | Wooden |
|---|---|
| Guarantee | 12 months parts |
Product codes
| Brand | Shire |
|---|---|
| Colour | Honey Brown |
| Model number (MPN) | MAMM1230DSL-1AA |
| Barcode (EAN) | 5060437986174 |
From the manufacturer's listing, checked 7 November 2026. Heights are not listed, so check them at the retailer if headroom or the 2.5 m boundary limit matters.
Ownership numbers
- Price per m²
- £132
- Base to prepare
- 9.22 x 3.94 m
- Price history
- Tracked daily
- Building Regulations
- Check with building control
Price divided by the measured floor area
About 112 paving slabs (600 x 600 mm), or 3.63 m³ of concrete at 100 mm deep
We log this price every day from 7 Nov 2026
Over 30 m² of floor area
Worked out by ShedBuilder from the measured size and today's prices. Slab and concrete figures cover the footprint only; add a margin if you want a path around it.
The base you will need
A 30 x 12 ft workshop needs a firm, level base at least 30 x 12 ft. Most guarantees depend on it. A concrete slab or paving lasts longest. A plastic grid filled with gravel is quicker, drains well and needs no concrete.
Protect the timber
Even pressure-treated buildings last longer with a coat of treatment every couple of years. Do the first coat before it goes up, while you can reach every board edge.
Protek Shed and Fence Stain - Black 5 Litre£23.00View at retailer →
Planning permission and Building Regulations
- Most garden buildings do not need planning permission in England and Wales if they are behind the front of the house and, with any other outbuildings, cover no more than half the garden.
- Within 2 m of a boundary the whole building, base included, must be no taller than 2.5 m. Further away, the limit is 4 m for an apex roof or 3 m for other roofs, and the eaves must stay under 2.5 m. Check the height on the product page before you order.
- At about 36.3 m², a workshop this size needs Building Regulations approval.
- A workshop for your own hobbies is incidental use. Running a business from it with customers or staff visiting may need planning permission.
Check your exact building in the builder's planning check · Planning permission guide
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