Plan HG-1856•A-Frame Cabin•40' × 30' Footprint

1,720 Sq Ft (30x40) 3 Bed 2 Bath A-Frame Cabin Floor Plan with Loft (Cathedral Glass Gable + Overlooking Sleeping Loft)

1,720 sq ft heated living • 3 Bedrooms, 2 Baths • Free 2D CAD Blueprint (.SVG)

Download Free CAD (.SVG)

Room Dimensions & Zones

40' × 30' Shell

MAIN BEDROOM

299 sq ft

23'-0" × 13'-0"

FULL BATH

221 sq ft

17'-0" × 13'-0"

CATHEDRAL GREAT ROOM

391 sq ft

23'-0" × 17'-0"

KITCHEN & DINING

289 sq ft

17'-0" × 17'-0"

UPPER SLEEPING LOFT

520 sq ft

40'-0" × 13'-0"

Build Cost Estimator

Estimated Cost to Build (40' × 30' A-Frame Cabin)

Region:

Shell / Building Kit

$76,000 – $97,000

Framing package, roof trusses & exterior shell for 1,200 sq ft base.

Owner-Builder

$198,500 – $261,500

Saves ~$89,500 by managing local slab & interior trades.

Turnkey Builder

$288,000 – $351,000

Full general contractor finish including slab, HVAC, kitchen & baths.

Est. Monthly Payment

$1,658 / mo

$255,600 financed (30-Yr)

Down Payment:20%

Interest Rate:6.75%

Free Vector CAD Blueprint • Plan HG-1856

Download 40' × 30' A-Frame Cabin Floor Plan (.SVG)

Scalable 2D architectural vector drawing with exterior and room dimensions, door swings, and fixture layout. Opens in AutoCAD, Illustrator, Inkscape, or any browser.

Material Takeoff & Framing Specifications

Concrete volume (23 yd³), roof surface (~1,901 sq ft), wall framing & architectural notes

Building Package	Specification	Quantity	Est. Range
Structural Shell & Trusses	40'×30' Heavy Timber / Engineered Glulam A-Truss System (4' o.c.)	1,200 sq ft shell kit	$76,000 – $97,000
Concrete Slab & Grade Beams	Insulated Concrete Pier / Frost-Protected Slab or Full Walkout	23 Cubic Yards (4,000 PSI)	$12,750 – $16,250
Roofing & Underlayment	Continuous Steep-Pitch Standing Seam Metal Roof (60°) (12:12 Pitch)	27 Roofing Squares (2,700 sq ft)	$11,340 – $18,360
Closed-Cell Spray Foam / Insulation	3" Closed-Cell Wall & Roof Deck Thermal Envelope (R-21 to R-38)	8,130 Board Feet	$10,976 – $15,041
Windows & Exterior Doors	Low-E Argon Black Architectural Glazing + 36" Fiberglass Entry	4 Windows • 3 Doors	$3,800 – $6,020
HVAC & Multi-Zone Mini-Split	High-SEER2 Heat Pump / Ductless Mini-Split System	3.5 Ton (42,000 BTU/hr)	$9,100 – $14,350

Exterior Perimeter

140 Linear Ft

Interior Partitions

~180 Linear Ft

Est. Concrete Slab

23 Cubic Yards

Roof Deck Area

~1,901 Sq Ft

Plan HG-1856 (1,720 Sq Ft (30x40) 3 Bed 2 Bath A-Frame Cabin Floor Plan with Loft (Cathedral Glass Gable + Overlooking Sleeping Loft)) is an IRC R304/R310-vetted a-frame cabin blueprint engineered around a 40'-0" × 30'-0" structural grid (1,200 sq ft base footprint, 0.75:1 Square-Bay Proportion). Configured on the Cathedral Glass Gable + Overlooking Sleeping Loft topology, this layout delivers 1,720 sq ft of conditioned residential living area and 320 sq ft of covered outdoor porch deck.

Inside the conditioned envelope, the floor plan is organized into 6 distinct architectural zones: MAIN BEDROOM (23'-0" × 13'-0", 299 sq ft), FULL BATH (17'-0" × 13'-0", 221 sq ft), CATHEDRAL GREAT ROOM (23'-0" × 17'-0", 391 sq ft), KITCHEN & DINING (17'-0" × 17'-0", 289 sq ft), UPPER SLEEPING LOFT (40'-0" × 13'-0", 520 sq ft), OPEN TO BELOW (40'-0" × 17'-0", 680 sq ft). Plumbing rough-ins are consolidated across FULL BATH, KITCHEN & DINING to minimize sub-slab trenching and manifold pipe runs. Sleeping quarters (MAIN BEDROOM at 299 sq ft; UPPER SLEEPING LOFT at 520 sq ft) are acoustically buffered from the primary living core and positioned on exterior elevations for code-compliant egress glazing.

From a builder takeoff standpoint, the 40' clear-span width utilizes heavy timber / engineered glulam a-truss system (4' o.c.) bearing on 140 linear feet of 6" exterior wall framing (~147 framing studs/posts) and 180 linear feet of interior partitions. The 12:12 continuous steep-pitch standing seam metal roof (60°) requires approximately 1,901 sq ft of roofing material (27 roofing squares), while the insulated concrete pier / frost-protected slab or full walkout pours at an estimated 23 cubic yards of 4,000-PSI concrete.

Frequently Asked Questions • Plan HG-1856

Building costs, foundation specs, egress & CAD customization questions

How much does it cost to build the 40x30 1,720 Sq Ft (30x40) 3 Bed 2 Bath A-Frame Cabin Floor Plan with Loft (Cathedral Glass Gable + Overlooking Sleeping Loft) (HG-1856)?

Based on current national residential construction data for a-frame cabin structures, the dried-in structural shell for Plan HG-1856 (1,200 sq ft base footprint) ranges from $76,000 to $97,000 ($45/sq ft baseline). A complete turnkey build—including the 23-yard concrete foundation, 180 linear feet of interior framing, MEP rough-ins for 2 bath(s), and interior finishes across 1,720 sq ft of heated space—ranges from $288,000 to $351,000. Use the interactive Regional Cost Multiplier on this page to adjust for your local labor market and owner-builder sweat equity.

What are the exact room dimensions inside this 1,720 sq ft 3-bedroom layout?

Plan HG-1856 features 6 architecturally solved spaces inside its 40' × 30' footprint: MAIN BEDROOM (23'-0" × 13'-0", 299 sq ft), FULL BATH (17'-0" × 13'-0", 221 sq ft), CATHEDRAL GREAT ROOM (23'-0" × 17'-0", 391 sq ft), KITCHEN & DINING (17'-0" × 17'-0", 289 sq ft), UPPER SLEEPING LOFT (40'-0" × 13'-0", 520 sq ft), OPEN TO BELOW (40'-0" × 17'-0", 680 sq ft). Every habitable room meets or exceeds IRC R304 minimum area (70+ sq ft) and minimum horizontal dimension (7'-0"+) requirements.

Can this 40' × 30' floor plan be built with post-frame, red-iron steel, or 2x6 stick framing?

Yes. Because the outer envelope is engineered on an even 40'-0" × 30'-0" structural grid (140 LF perimeter) with clear-span 12:12 trusses, a local structural engineer or building kit supplier can adapt the blueprint for Heavy Timber / Engineered Glulam A-Truss System (4' o.c.), conventional 2x6 stick framing at 16" o.c., laminated post-frame columns at 8' o.c., or structural insulated panels (SIPs).

What files are included in the free CAD blueprint download for Plan HG-1856?

Downloading Plan HG-1856 provides the high-resolution scalable vector floor plan (.SVG) with crisp architectural lineweights, exterior dimension strings (40'-0" × 30'-0"), room-by-room callouts, door swing arcs, and window schedules, plus instant browser printing for contractor bidding and preliminary municipal zoning review.