Tongue & Groove Clubhouse Summerhouses | Project Timber
10% off the Grandmaster range with code GM10 Offer ends in 11d: 02h: 13m: 37s
Summerhouse · GRANDMASTER · DOUBLE GLAZED · TWIN ROOM

A garden room and a storeroom, in one.

The Clubhouse with a built-in partition wall, creating a separate side storage room as standard. Bi-fold French doors, double glazing, 2m eaves and 7 sizes, all 8ft building depth.

From £2,499£2,249

Build your Summerhouse.

Grandmaster Clubhouse Storeroom G1000 Summerhouse – 11mm Pressure Treated Tongue and Groove (8ft Internal Depth)

Made in Britain
Selected size: None
Description

The Clubhouse Storeroom G1000 combines a bright bi-fold fronted summerhouse with a built-in side storage room, separated by a partition wall with its own boarded door. Long opening windows to the front and sides let in plenty of light, with single glazed french doors and double glazed windows as standard. Extra tall 2m eaves height and a contemporary pent roof design create a versatile twin-room space for relaxing and storage.

Key features
  • Pressure-treated 11mm tongue and groove shiplap cladding (16mm upgrade available)
  • 27x44mm panel framing, key supports doubled to 54mm
  • Bi-folding French doors to the main room
  • Built-in partition wall with boarded storage room door
  • Separate side storage room, left or right position
  • Long opening windows on front and sides
  • Single glazed french doors and double glazed windows as standard
  • Extra tall 2m eaves height
  • Contemporary pent roof with thicker purlins
  • Green mineral felt roof covering as standard
  • Pre-assembled modular panels
  • All fixtures, fittings and fixings included
  • Free UK delivery on selected postcodes*
View full specifications

Free delivery to most mainland UK postcodes*
Delivery available from Sep, 21st Mon · choose your delivery date at checkout
£4,461.00
inc. VAT

Prices as per the live configurator. Paint/trim swatch colours are indicative approximations.

Get the highlights.

Watch the showcase
Pressure-treated tongue and groove shiplap cladding. 11mm or 16mm thickness available.

Pressure-treated tongue and groove shiplap cladding. 11mm or 16mm thickness available.

For a stronger and longer lasting building with engineered interlocking cladding.

Single glazed bi-folding French doors, double glazed windows

Single glazed bi-folding French doors, double glazed windows

Every window is double glazed as standard, with a side storage room.

Extra tall 2m eaves height.

Extra tall 2m eaves height.

High eaves and ridge make the interior feel like a proper room, not a garden shed.

25-year anti-rot guarantee*

25-year anti-rot guarantee*

Pressure-treated against fungal decay and rot, painting required annually.

11mm tongue and groove pent roof.

11mm tongue and groove pent roof.

Contemporary pent roof with thicker purlins and green mineral felt as standard.

Pre-assembled modular panels for easy assembly.

Pre-assembled modular panels for easy assembly.

Flatpacked and fits through a standard UK door with all fixings included.

In the box

Everything you need, in one delivery.

No hidden extras and no surprise add-ons. Your Summerhouse arrives complete — every panel, fixing and fitting ready to go.

Grandmaster Clubhouse Storeroom G1000 Summerhouse – 11mm Pressure Treated Tongue and Groove (8ft Internal Depth)
  • Pressure-treated 11mm tongue and groove shiplap cladding (16mm upgrade available)
  • Pre-assembled modular panels
  • Bi-folding French doors
  • Built-in partition wall with boarded storage room door
  • Separate side storage room (left or right position)
  • Single glazed french doors and double glazed windows as standard
  • Long opening windows on front and sides
  • Extra tall 2m eaves height
  • 27x44mm panel framing (key supports doubled to 54mm)
  • 11mm T&G roof as standard
  • Green mineral felt roof covering
  • All fixtures, fittings and fixings included
  • Free UK delivery, *on selected postcodes*
Configure your Summerhouse
Why the Clubhouse Storeroom

Eight reasons it's built differently.

FREE Pressure Treatment

Factory-applied before it leaves us, at no extra cost.

11 & 16mm shiplap

Choose 11mm shiplap, or upgrade to a heavier 16mm.

T&G Floor and Roof

Tongue-and-groove floor and roof for a solid, tight build.

Double Glazed Windows

Single glazed doors and double glazed windows

Free Premium Fixings

Every fixing and fitting included as standard, with premium quality throughout.

25 Year Anti-rot Guarantee*

Pressure-treated against fungal decay and rot. Painting required annually.

Easy Self Assembly

Stage-by-stage illustrated instructions with all fixings included.

Free UK Day Delivery*

We offer free UK delivery on selected postcodes*.

Grandmaster Clubhouse Storeroom G1000 Summerhouse – 11mm Pressure Treated Tongue and Groove (8ft Internal Depth)
YOUR GARDEN, YOUR SPACE

Two rooms. One building.

The Clubhouse Storeroom gives you everything the standard Clubhouse offers, plus a dedicated storage room behind an internal partition wall. The storage room sits to the left or right depending on how you arrange the panels, so you can keep tools, bikes or garden equipment out of sight without using any extra garden space. Bi-fold French doors, double glazed windows, long opening windows and 2m eaves height throughout.

11 & 16mm
Shiplap cladding
44mm
Double-up framing
2m
Eaves height
SHIPLAP TONGUE & GROOVE CLADDING

Tough timber, built to weather.

Every Grandmaster panel is built on 27x44mm framing with key supports doubled to 54mm, giving the building a rigidity you can feel. Pressure-treated 11mm shiplap cladding with a 16mm upgrade option, an 11mm T&G roof on heavy-duty purlins and mineral felt covering as standard, backed by a 25-year anti-rot guarantee*. Built properly and treated annually, this is a building that will give you years of enjoyment.

Grandmaster Clubhouse Storeroom G1000 Summerhouse – 11mm Pressure Treated Tongue and Groove (8ft Internal Depth)
Built to last · Made in Britain

Engineered stronger where it counts.

27x44mm panel framing with key supports doubled to 54mm throughout the whole building, including the storage room. Pressure-treated 11mm shiplap with a 16mm upgrade option, mineral felt roof covering as standard, and a 25-year anti-rot guarantee*.

50+
Years' experience
UK
Designed & made
Grandmaster Clubhouse Storeroom G1000 Summerhouse – 11mm Pressure Treated Tongue and Groove (8ft Internal Depth)
Assembly

Most of the build is already done.

Your Summerhouse arrives as pre-assembled, pre-insulated panels — designed to fit through a standard UK doorway and slot together with far fewer parts than a traditional log cabin. A quicker, simpler build, whether you do it yourself or bring in help.

Every building includes clear, step-by-step illustrated instructions. We recommend two people with basic DIY know-how — or add our assembly service at checkout and we'll handle it for you.

Make it yours

Configure it around how you'll use it.

Floor thickness

Floor thickness

Choose 11mm or 19mm tongue and groove floor to suit how you plan to use the building.

Wall thickness

Wall thickness

Choose 11mm tongue and groove shiplap as standard, or upgrade to 16mm for a more substantial build.

Storage room for the left or right

Storage room for the left or right

Assemble your side storeroom on the left or right to suit your garden layout.

Guttering

Guttering

Add guttering to manage rainwater runoff and protect the base of your building.

Paint colour

Paint colour

High-quality paint supplied in a tub. Apply after assembly to colour and protect the timber.

Timber base

Timber base

Optional timber base frame for use on firm, level ground if you don't have an existing concrete or paved base.

Build & price yours
Grandmaster Clubhouse Storeroom G1000 Summerhouse – 11mm Pressure Treated Tongue and Groove (8ft Internal Depth)
SPACE, DONE PROPERLY

Your building. Done your way.

Built around how you use it, with options to make it exactly right.

Specifications

SelectSize
SelectMeasurements

Overall Dimensions

Overall Width253 cm
Overall Depth229.2 cm
Total Wall Thickness (incl. insulation)80 mm
Width (internal)229 cm
Depth (internal)174.3 cm

Eaves & Ridge

Eaves Height (inc. floor)230.7 cm
Eaves Height (excl. floor)218.2 cm
Ridge Height (inc. floor)240.2 cm
Ridge Height (excl. floor)227.7 cm
Eaves Height (internal)204.4 cm
Ridge Height (internal)212.4 cm

Doors

Door Height180 cm
Door Width73 cm
Door Opening (H × W)H180 × W73 cm

Windows

Glazing Thickness4–20–4 mm
Frame Thickness (H × W)2.7 × 4.4 cm

Floor & Base

Overall Floor Size (W × D)249 × 194.3 cm
Base Size244 × 189.3 cm

Materials

Cladding9mm LP Strongcore composite
Floor materialTongue & groove
Roof materialGalvanised steel & foam insulation
Roof coveringGalvanised steel
GlazingDouble glazing

Features

Building typeGarden room
Windows4
Roof stylePent
Cladding styleComposite board
Locking systemUPVC multi-point
U-value, metal roof0.49 W/(m²·K)
U-value, walls & floor0.31 W/(m²·K)
Pre-assembled panelsYes
Interchangeable windowsNo
Fixtures & fittingsYes

Questions, answered.

Do I need planning permission?
Usually not. Our buildings are designed to stay under 2.5m in height and fall under "permitted development," so planning permission typically isn't required. Always check with your local authority if you're in a conservation area, national park or listed building, and note the building shouldn't be used as self-contained accommodation. We don't offer legal advice — please confirm with your local planning authority before ordering.
Do I need a base?
Yes — all garden buildings must be assembled on a solid, level foundation. Our purpose-made Eze Base provides a solid, level foundation with minimal groundwork; ask us to add it to your order. Assembling on an unsuitable foundation may invalidate your warranty.
Is it difficult to assemble?
No. The panels arrive pre-assembled and pre-insulated and fit through a standard doorway. We recommend two people with basic DIY tools, and every building comes with clear, illustrated instructions. Prefer not to build it? Add our assembly service at checkout.
How is it delivered?
Kerbside, by lorry or van. You choose a preferred delivery date at checkout and we do our best to meet it — at busier times we may need to agree an alternative date with you, and we'll keep you informed throughout. Please ensure there's clear access in front of your property on the delivery date.
★ 15-year anti-rot guarantee

Bought with confidence.

Free delivery to selected postcodes, and Made in Britain.

Customer photo
★★★★★

"Genuinely warm in winter — I work in here every day now. Build quality is excellent."

— Verified buyer
Customer photo
★★★★★

"Panels went together far faster than I expected. The composite finish looks premium."

— Verified buyer
Customer photo
★★★★★

"From order to install was seamless. The team kept me informed the whole way."

— Verified buyer

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Your building is
ready when you are.

From £2,499£2,249 FREE DELIVERY*