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A cozy wooden garden room with sliding glass doors and a shaded porch showcases the GardenHouse24 USA ALU Concept Arosa 70C Garden Room in a green backyard setting

ALU Concept Arosa 70C – Freedom Office, 349 sq ft

SKU 7026030
Save $5,759.20
$34,555.20
$28,796.00
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The ALU Concept Arosa 70C Freedom Office is a garden office built from Nordic spruce with 70mm solid log walls. It features sliding glass doors and aluminum framing. With 349 sq ft of interior space, it works well as a home office, studio or home gym.

Key specs

  • Interior area: 349 sq ft
  • Footprint: 18.97 ft x 18.97 ft
  • Ridge height: 11.07 ft; eave height: 8.19 ft
  • Wall thickness: 70mm (2.76 in) Nordic spruce logs
  • Gable roof (16.9° slope), floor included

What's included

  • DIY kit, arrives flat-packed
  • Closed shell with internal walls
  • Doors and windows included
  • Roofing cover and rain gutters available as extras
Shipping

12 Weeks Delivery

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50% DEPOSIT

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Lasts A Lifetime!

3 Year Warranty

A Cozy Corner to Read, Recharge, and Reconnect

GardenHouse24 USA ALU Concept Arosa 70C Garden Room is a premium outdoor structure made from high-quality Nordic spruce with a sleek aluminum finish and modern sliding glass doors for seamless indoor-outdoor flow. It features a spacious 19.9 m² layout, floor-to-ceiling windows, privacy panels, and an extended roof for shade and protection.

What's Included?

  • DIY kit
  • Closed shell
  • Arrives in flatpack
  • Internal walls included
  • Doors & windows included
  • Roofing cover & rain gutters as an extra

Specifications

  • Indoor area: 348.75 ft²
  • Log profile: 2.76 in
  • Number of floors: 1
  • Number of rooms: 1
  • Base dimensions: 18.97 ft x 18.97 ft
  • Floor space 1 floor: 348.75 ft²
  • Floor Material: 1.1 in
  • Roof Type: Gable roof
  • Floor included: Yes
  • Wood type: Nordic spruce, massive logs
  • Ridge height: 11.07 ft
  • Roof area: 575.87 ft²
  • Eave Height: 8.19 ft
  • Doors Included: Yes
  • Windows Included: Yes
  • Roof Shingles Included: No
  • Roof Slope: 16.9°
  • Roof Material: Nordic spruce

Features

  • Spacious Interior: With nearly 20 square meters of floor space, it offers plenty of room for relaxing, working, or entertaining guests.
  • Sliding Glass Doors: The full-length sliding doors provide wide, seamless access to the outdoors while letting in plenty of natural light.
  • Premium Nordic Spruce: Built with durable Nordic spruce, the structure offers excellent insulation, long-lasting strength, and natural beauty.
  • Modern Slatted Privacy Panels: The sleek wood slats provide added shade and visual privacy without closing you off from your surroundings.
  • Extended Roof Overhang: Its overhanging gable roof offers protection from sun and rain, creating a comfortable outdoor seating area.
  • Weather-Resistant Construction: Engineered to withstand the elements, it’s ideal for year-round use in various climates.

Internal Room

The Internal Room includes an assembly kit designed for easy installation inside a finished garden building. It features a sliding door and ceiling, creating a fully enclosed space.

The kit also comes with two solid 1.1-inch walls, a corner support beam, and all the necessary fixings, conveniently packed flat for transport.

Closet: 3.98 ft x 5.95 ft

Bathroom: 3.98 ft x 7.92 ft

Staining/Painting Treatment

Extend the life of your outdoor freedom room and protect it from environmental damage with premium wood treatment.

Benefits include:

  • Shields wood from rot, mold, and staining fungi
  • Guards against UV rays and rain
  • Prolongs the durability of wooden surfaces
  • Enhances appearance and makes cleaning easier

Recommended high-end wood staining products:

  • Cabot Australian Timber Oil – Known for deep penetration and rich, long-lasting color; ideal for decks, siding, and outdoor structures.
  • DEFY Extreme Wood Stain – A water-based, eco-friendly stain with high UV resistance and durable protection for harsh outdoor conditions.

Downloads

Why Choose Outdoor Freedom Rooms?

We use premium Nordic/Baltic Spruce

These softwoods thrive in the cold northern regions of Europe and grow more slowly than standard spruce, pine, or fir, resulting in 6 to 8 times more growth rings. Spruce features a finer grain and fewer, smaller knots than Pine, though both types are lightweight and easy to machine.

Comes with a 5-year anti-rot warranty

It includes a 5-year anti-rot warranty that begins the moment your order ships. This covers issues such as glass or hardware seal failures, wall log splitting, or faulty components.

Unloading is included in the delivery

Receive your new log house hassle-free, our delivery service handles the unloading at no extra cost.

Fast delivery for in-stock items

Have your freedom rooms delivered right to your doorstep! In-stock models arrive in 10–12 weeks.

About Garden House 24 Timber Garden Products

Born from a passion for precision craftsmanship, Garden House 24 brings decades of timber-building expertise to your backyard. What began as a small European workshop has grown into a trusted source for high-quality garden rooms, sheds, and cabins. Built to last and designed to inspire, our timber products combine durability with timeless style.

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