Plan HG-1140•A-Frame Cabin•20' × 20' Footprint

582 Sq Ft (20x20) 1 Bed 1 Bath A-Frame Cabin Floor Plan with Loft

582 sq ft heated living • 1 Bedroom, 1 Bath • Free 2D CAD Blueprint (.SVG)

Download Free CAD (.SVG)

Room Dimensions & Zones

20' × 20' Shell

MAIN BEDROOM

104 sq ft

11'-6" × 9'-0"

FULL BATH

77 sq ft

8'-6" × 9'-0"

CATHEDRAL GREAT ROOM

127 sq ft

11'-6" × 11'-0"

KITCHEN & DINING

94 sq ft

8'-6" × 11'-0"

UPPER SLEEPING LOFT

180 sq ft

20'-0" × 9'-0"

Build Cost Estimator

Estimated Cost to Build (20' × 20' A-Frame Cabin)

Region:

Shell / Building Kit

$26,500 – $34,000

Framing package, roof trusses & exterior shell for 400 sq ft base.

Owner-Builder

$68,000 – $90,000

Saves ~$31,000 by managing local slab & interior trades.

Turnkey Builder

$99,000 – $121,000

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

Est. Monthly Payment

$571 / mo

$88,000 financed (30-Yr)

Down Payment:20%

Interest Rate:6.75%

Free Vector CAD Blueprint • Plan HG-1140

Download 20' × 20' 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 (10 yd³), roof surface (~634 sq ft), wall framing & architectural notes

Building Package	Specification	Quantity	Est. Range
Structural Shell & Trusses	20'×20' Heavy Timber / Engineered Glulam A-Truss System (4' o.c.)	400 sq ft shell kit	$26,500 – $34,000
Concrete Slab & Grade Beams	Insulated Concrete Pier / Frost-Protected Slab or Full Walkout	10 Cubic Yards (4,000 PSI)	$4,500 – $5,750
Roofing & Underlayment	Continuous Steep-Pitch Standing Seam Metal Roof (60°) (12:12 Pitch)	10 Roofing Squares (1,000 sq ft)	$4,200 – $6,800
Closed-Cell Spray Foam / Insulation	3" Closed-Cell Wall & Roof Deck Thermal Envelope (R-21 to R-38)	3,660 Board Feet	$4,941 – $6,771
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	1.5 Ton (18,000 BTU/hr)	$3,900 – $6,150

Exterior Perimeter

80 Linear Ft

Interior Partitions

~101 Linear Ft

Est. Concrete Slab

10 Cubic Yards

Roof Deck Area

~634 Sq Ft

Plan HG-1140 (582 Sq Ft (20x20) 1 Bed 1 Bath A-Frame Cabin Floor Plan with Loft) is an IRC R304/R310-vetted a-frame cabin blueprint engineered around a 20'-0" × 20'-0" structural grid (400 sq ft base footprint, 1:1 Square-Bay Proportion). Configured on the Cathedral Glass Gable + Overlooking Sleeping Loft topology, this layout delivers 582 sq ft of conditioned residential living area and 160 sq ft of covered outdoor porch deck.

Inside the conditioned envelope, the floor plan is organized into 6 distinct architectural zones: MAIN BEDROOM (11'-6" × 9'-0", 104 sq ft), FULL BATH (8'-6" × 9'-0", 77 sq ft), CATHEDRAL GREAT ROOM (11'-6" × 11'-0", 127 sq ft), KITCHEN & DINING (8'-6" × 11'-0", 94 sq ft), UPPER SLEEPING LOFT (20'-0" × 9'-0", 180 sq ft), OPEN TO BELOW (20'-0" × 11'-0", 220 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 104 sq ft; UPPER SLEEPING LOFT at 180 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 20' clear-span width utilizes heavy timber / engineered glulam a-truss system (4' o.c.) bearing on 80 linear feet of 6" exterior wall framing (~96 framing studs/posts) and 101 linear feet of interior partitions. The 12:12 continuous steep-pitch standing seam metal roof (60°) requires approximately 634 sq ft of roofing material (10 roofing squares), while the insulated concrete pier / frost-protected slab or full walkout pours at an estimated 10 cubic yards of 4,000-PSI concrete.

Frequently Asked Questions • Plan HG-1140

Building costs, foundation specs, egress & CAD customization questions

How much does it cost to build the 20x20 582 Sq Ft (20x20) 1 Bed 1 Bath A-Frame Cabin Floor Plan with Loft (HG-1140)?

Based on current national residential construction data for a-frame cabin structures, the dried-in structural shell for Plan HG-1140 (400 sq ft base footprint) ranges from $26,500 to $34,000 ($45/sq ft baseline). A complete turnkey build—including the 10-yard concrete foundation, 101 linear feet of interior framing, MEP rough-ins for 1 bath(s), and interior finishes across 582 sq ft of heated space—ranges from $99,000 to $121,000. 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 582 sq ft 1-bedroom layout?

Plan HG-1140 features 6 architecturally solved spaces inside its 20' × 20' footprint: MAIN BEDROOM (11'-6" × 9'-0", 104 sq ft), FULL BATH (8'-6" × 9'-0", 77 sq ft), CATHEDRAL GREAT ROOM (11'-6" × 11'-0", 127 sq ft), KITCHEN & DINING (8'-6" × 11'-0", 94 sq ft), UPPER SLEEPING LOFT (20'-0" × 9'-0", 180 sq ft), OPEN TO BELOW (20'-0" × 11'-0", 220 sq ft). Every habitable room meets or exceeds IRC R304 minimum area (70+ sq ft) and minimum horizontal dimension (7'-0"+) requirements.

Can this 20' × 20' floor plan be built with post-frame, red-iron steel, or 2x6 stick framing?

Yes. Because the outer envelope is engineered on an even 20'-0" × 20'-0" structural grid (80 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-1140?

Downloading Plan HG-1140 provides the high-resolution scalable vector floor plan (.SVG) with crisp architectural lineweights, exterior dimension strings (20'-0" × 20'-0"), room-by-room callouts, door swing arcs, and window schedules, plus instant browser printing for contractor bidding and preliminary municipal zoning review.