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A full frontal view of Sawmill Structures The Northwood Grand DD 70mm Garden Room shows its symmetrical design and idyllic forest setting near a lake

The Northwood Grand DD 70mm

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Save $8,000.00
$29,999.00
$21,999.00
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12 Weeks Delivery

High Density Nordic Spruce

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FREE Shipping

12 Weeks Delivery

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512-777-0154

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Made in the USA

Guaranteed Premium Quality

Engineered for Escape, Built for a Lifetime

Sawmill Structures The Northwood Grand DD 70mm Garden Room is a spacious, heavy-duty garden house made from premium 70mm thick interlocking timber for superior insulation and year-round use. It features double-glazed doors and windows, a lofted sleeping area, and a wide open-plan layout perfect for a guest room, office, or backyard retreat. Built for durability and comfort, this wooden cabin combines high-quality craftsmanship with versatile function for any outdoor living space.

What's Included?

  • We give you everything cut to size and milled to fit together perfectly, so you can easily create a beautiful Cabin structure quickly.
  • Premium double tongue and groove InterStack Log™ wall system with integrated CrossLock Corners™
  • Tongue and groove flooring boards
  • Tongue and groove ceiling boards
  • InterStack Log™ Roof Beams
  • Windows with screens
  • Doors
  • Door lock set
  • Fasteners
  • Interior and exterior trim

Specifications

  • Structure Square Footage: 225 ft2 + Bonus Loft 135 ft2
  • Structure Dimension Exterior Footprint: 14’-9 1/4"” x 14’ 9 1/4””
  • Interior: 14’-6” w x 14’-6” d + Loft 14’-6” w x 9' d
  • Height: 14′ 6’
  • Roof Dimensions: 120 - 3/4" h x 232- 1/4” ; ( Each side )
  • Roof Pitch - 9/12
  • Building Permit Information: Building permit likely required in most areas.
  • Timber Material Used: Nordic Spruce • Kiln dried
  • Timber Characteristics: Dense grain softwood. Light blonde appearance and very aromatic.
  • Windows and Doors: Double pane windows and doors. Window screens included.
  • Log System: Exclusive InterStack Log System
  • Log System Features: Minimal fasteners required. Double tongue & groove profile with cross locking corners
  • Log Thickness: 70mm thick walls precision milled.

Features

  • Thick Timber Walls: Crafted with 70mm interlocking logs, it offers outstanding insulation and long-term durability for year-round use.
  • Double-Glazed Doors and Windows: Provides energy efficiency, reduces outside noise, and lets in plenty of natural light.
  • Lofted Sleeping Area: A raised loft gives you extra space for sleeping or relaxing without sacrificing the main floor.
  • Spacious Interior: Its open-plan layout is ideal for creating a cozy guest suite, creative studio, or backyard office.
  • Premium Spruce Construction: Made from slow-grown Nordic spruce, it ensures high density, strength, and natural beauty.
  • Easy Assembly Kit: Comes with pre-cut materials and instructions, making it DIY-friendly for experienced builders.

Downloads

Delivery/Pick Up Info

Door-to-Door Delivery

We deliver anywhere worldwide.

Shipping Pallet Size:

  • 3 Pallets uniformly packed
  • 19’-6” L x 4’W x 2 1/2” H
  • Total Weight of all 3 pallets: 7,300 Lbs

Local Pick Up

Pick up is available at select locations or at a mutually determined distribution center in your area.

Trailer Size for Pick Up:

  • Pick up for this model requires a minimum 20’ long double axle trailer.
  • Weight rated to 7,000 Lbs

Learn More About...

Heating & Cooling: Options include electric heaters, wood stoves, propane furnaces, heat pumps, or portable/permanent AC units. Always follow local safety codes and consult a licensed HVAC pro before installation.

Foundations: A solid, level base is essential. Choose a well-drained location with enough clearance for assembly. Foundations can include existing decks, patios, concrete slabs, or pressure-treated timbers. We recommend a simple pressure-treated deck frame supported by footings suited to your soil. Consider screw piles (DIY or pro), sono tubes, or concrete pads.

Insulation: Many customers enjoy our cabins without insulation, especially with a reliable heat source. Our InterStack Log™ walls (38–90mm thick) naturally regulate temperature thanks to their thermal mass, storing heat and releasing it gradually.

Roofing: Kits include roof structure components (beams, tongue-and-groove boards) but not roof coverings. For covered builds, we offer corrugated or steel panels depending on the model. We recommend sheet/panel systems over shingles—they’re faster, easier, and better suited to our designs.

Wood Protection: To protect your cabin’s exterior, apply a high-quality wood stain. Our top picks: Sansin and Cutek Extreme, both offer long-lasting beauty and weather resistance.

About Sawmill Structures

Born from Canadian roots, Sawmill Structures began with a single log cabin dream and a deep love for the outdoors.

Today, they craft premium, ready-to-assemble backyard structures that blend craftsmanship with nature. Whether you're building a guest cabin, studio, or garden retreat, Sawmill Structures kits bring timeless woodwork to your door.

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