Dunster House Leviathan Garden Bar Gazebo | W6m x D3m | Fully Installed Nationwide

The Dunster House Leviathan Garden Bar Gazebo is the outdoor entertaining structure that stops the conversation the moment guests walk into the garden. Spanning 6 metres wide and 3 metres deep, with chunky 120mm x 120mm uprights and a built-in bar at 1.14m height, this is not a gazebo with a shelf bolted on — it is a purpose-engineered outdoor bar and covered entertaining space that is built to host, built to impress, and built to last.

Supplied by Dunster House and fully installed by our in-house team at Bespoke Oak and Slate across the whole of Mainland UK, the Leviathan arrives as a complete, ready-to-use structure. Foundations, felt roof, Smart Seal timber treatment, all fixings — everything is included and handled by our own experienced team. You do not lift a finger.

Built for Serious Outdoor Entertaining

The Leviathan is designed around the experience of hosting. The integrated bar runs the full width of the structure at a comfortable 1.14m serving height, giving you a proper bar-top surface for drinks, food, and everything in between. The 120mm x 120mm uprights are among the chunkiest in the Dunster House range — they give the structure a presence and solidity that you feel immediately, and they frame the space in a way that makes it feel like a permanent feature of the garden rather than a temporary addition.

At nearly 3.1m tall at the overall height and with 2.12m of internal eaves clearance, there is genuine headroom throughout — no ducking, no cramped corners, just a generous, well-proportioned outdoor room that works for everything from casual summer evenings to large celebrations.

Pressure Treated, Smart Sealed, Built to Last

Every piece of timber in the Leviathan is pressure treated at the factory — not dip treated, but properly pressure treated through to the core — and backed by a 10-year guarantee against rot and insect infestation. Once our team completes the installation, all exposed timber is finished with Smart Seal, a premium timber sealant that locks in the treatment, repels moisture, and keeps the structure looking sharp year after year with minimal maintenance.

The 19mm tongue and groove roof boards provide a robust, solid base for the felt roof covering that is included as standard — a properly installed, weathertight roof that keeps your bar dry and your guests comfortable whatever the British weather decides to do.

Installed by Our Own Team, Nationwide

We install garden structures across the whole of Mainland UK using our own in-house teams — not subcontractors, not agency labour, but experienced installers who have fitted hundreds of structures and take pride in every job. We handle the full scope: foundation preparation, roof installation, Smart Seal timber treatment, and a clean, tidy finish. Your Leviathan is ready to use from day one.

What’s Included as Standard

• Nationwide installation — we install across the whole of Mainland UK using our own in-house teams
• Full professional installation — our team handles everything from groundworks to handover
• Foundation preparation — included as standard, no separate quote required
• All fixings supplied — every bolt, bracket, and fixing needed for a complete, secure installation
• Felt roof supplied and installed — a fully weathertight felt roof covering included in the price and professionally fitted
• Smart Seal timber treatment — all timber sealed with Smart Seal as standard for lasting protection and a premium finish
• Pressure treated timber throughout — factory treated with a 10-year guarantee against rot and insect infestation
• Integrated bar top — built-in bar at 1.14m serving height, included as standard

Optional Upgrades

• Britmet Composite Slate Roof Upgrade — £2,000 — replace the standard felt roof with a premium Britmet composite slate finish. Based on the overall roof area of 6.06m x 3.22m (19.51m²), this upgrade includes supply, full installation, and all associated flashings — a finish that is virtually indistinguishable from natural slate and engineered to last a lifetime with zero maintenance.
• Timber Decking — £2,000 — complete the space with a professionally installed pressure treated timber deck beneath your bar gazebo. Based on the full footprint of 6.04m x 3.04m (18.36m²), sealed with Smart Seal as standard. The perfect foundation for bar stools, outdoor furniture, and a finished entertaining space.
• Composite Decking Upgrade — upgrade to a premium low-maintenance composite deck that never needs oiling, staining, or treating. Contact us for a price.
• Lighting Installation — add a professionally installed outdoor lighting scheme to your bar gazebo. From bar-top downlighters to atmospheric perimeter lighting, we design and install the full package. Contact us for a price.

Technical Specifications

• Overall External Dimensions: 6.06m x 3.22m (19’ 10" x 10’ 6")
• External Width: 6.04m (19’ 9")
• External Depth: 3.04m (9’ 11")
• Internal Width: 5.57m (18’ 3")
• Internal Depth: 5.57m (18’ 3")
• Overall Height: 3.04m (9’ 11")
• Internal Eaves Height: 2.12m (6’ 11")
• Bar Height: 1.14m (3’ 8")
• Uprights: 120mm x 120mm spruce
• Roof Structure: 19mm tongue and groove boards
• Roof Covering: Felt (included as standard)
• Timber: Spruce, pressure treated
• Timber Finish: Smart Seal applied to all exposed timber as standard
• Guarantee: 10 years on pressure treated timber against rot and insect infestation

Frequently Asked Questions

Is this a Dunster House product?

Yes — the Leviathan Garden Bar Gazebo is a Dunster House product, supplied by Dunster House and fully installed by Bespoke Oak and Slate. You get the quality and guarantee of a Dunster House structure with the peace of mind of a complete, professional installation service.

What does full installation include?

Full installation includes foundation preparation, erection of the complete structure, felt roof supply and installation, Smart Seal timber treatment, and all fixings. We leave your garden clean and tidy with a structure that is ready to use from day one. There are no hidden extras and no separate groundworks quotes.

Do you install across the whole of the UK?

We install across the whole of Mainland UK — from Cornwall to Caithness. Our own in-house installation teams travel nationwide, so wherever your garden is, we can get there.

What is the felt roof like? Can I upgrade it?

The felt roof is a properly installed, weathertight covering that will keep your bar gazebo dry and protected. If you want a more premium finish, you can upgrade to a Britmet composite slate roof for £1,500 — a high-quality, low-maintenance alternative that looks virtually identical to natural slate and is engineered to last a lifetime.

Can I add decking beneath the bar gazebo?

Yes — we can install a pressure treated timber deck beneath the full footprint of the structure (6.04m x 3.04m / 18.36m²) for £2,000, sealed with Smart Seal as standard. A composite decking upgrade is also available — contact us for a price.

Can I add lighting to the bar gazebo?

Absolutely — we can design and install a full outdoor lighting scheme for your Leviathan, from bar-top downlighters to atmospheric perimeter lighting. Contact us to discuss your requirements and we will provide a price.

What timber is used and how is it treated?

The Leviathan is built from spruce with 120mm x 120mm uprights and 19mm tongue and groove roof boards. All timber is pressure treated at the factory — not dip treated — giving you a 10-year guarantee against rot and insect infestation. Once installed, all exposed timber is finished with Smart Seal for additional weather protection and a premium appearance.

How long does installation take?

Installation time varies depending on site conditions, foundation type, and access, but most Leviathan installations are completed within one to two days by our team. We will confirm the expected timeline when we book your installation date.

All sizes quoted are nominal. This is a fully installed product — no DIY assembly required. Supplied by Dunster House, installed by Bespoke Oak and Slate across Mainland UK.