Plan HG-1660•Modern Cabin•40' × 28' Footprint

1,121 Sq Ft (28x40) 3 Bed 2 Bath Modern Cabin Floor Plan

1,121 sq ft heated living • 3 Bedrooms, 2 Baths • Free 2D CAD Blueprint (.SVG)

Download Free CAD (.SVG)

Room Dimensions & Zones

40' × 28' Shell

PRIMARY SUITE

188 sq ft

15'-0" × 12'-6"

BEDROOM 2

156 sq ft

12'-6" × 12'-6"

BEDROOM 3

156 sq ft

12'-6" × 12'-6"

GREAT ROOM & DINING

388 sq ft

25'-0" × 15'-6"

BATH & LAUNDRY

105 sq ft

15'-0" × 7'-0"

KITCHEN & ISLAND

128 sq ft

15'-0" × 8'-6"

Build Cost Estimator

Estimated Cost to Build (40' × 28' Modern Cabin)

Region:

Shell / Building Kit

$49,500 – $63,000

Framing package, roof trusses & exterior shell for 1,120 sq ft base.

Owner-Builder

$133,000 – $175,000

Saves ~$60,000 by managing local slab & interior trades.

Turnkey Builder

$193,000 – $235,000

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

Est. Monthly Payment

$1,110 / mo

$171,200 financed (30-Yr)

Down Payment:20%

Interest Rate:6.75%

Free Vector CAD Blueprint • Plan HG-1660

Download 40' × 28' Modern 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 (22 yd³), roof surface (~1,281 sq ft), wall framing & architectural notes

Building Package	Specification	Quantity	Est. Range
Structural Shell & Trusses	40'×28' 2x6 Advanced Framing w/ Steel Moment Frame View Wall	1,120 sq ft shell kit	$49,500 – $63,000
Concrete Slab & Grade Beams	Insulated Concrete Slab w/ Radiant Floor Heating Prep	22 Cubic Yards (4,000 PSI)	$10,750 – $14,000
Roofing & Underlayment	Single-Slope Shed Metal Roof w/ Deep Cantilevered Overhangs (2.5:12 Pitch)	15 Roofing Squares (1,500 sq ft)	$6,300 – $10,200
Closed-Cell Spray Foam / Insulation	3" Closed-Cell Wall & Roof Deck Thermal Envelope (R-21 to R-38)	7,740 Board Feet	$10,449 – $14,319
Windows & Exterior Doors	Low-E Argon Black Architectural Glazing + 36" Fiberglass Entry	6 Windows • 5 Doors	$5,100 – $7,980
HVAC & Multi-Zone Mini-Split	High-SEER2 Heat Pump / Ductless Mini-Split System	2 Ton (24,000 BTU/hr)	$5,200 – $8,200

Exterior Perimeter

136 Linear Ft

Interior Partitions

~118 Linear Ft

Est. Concrete Slab

22 Cubic Yards

Roof Deck Area

~1,281 Sq Ft

Plan HG-1660 (1,121 Sq Ft (28x40) 3 Bed 2 Bath Modern Cabin Floor Plan) is an IRC R304/R310-vetted modern cabin blueprint engineered around a 40'-0" × 28'-0" structural grid (1,120 sq ft base footprint, 0.7:1 Square-Bay Proportion). Configured on the Consolidated Wet-Wall + Open Great Room topology, this layout delivers 1,121 sq ft of conditioned residential living area and 150 sq ft of covered outdoor porch deck.

Inside the conditioned envelope, the floor plan is organized into 6 distinct architectural zones: PRIMARY SUITE (15'-0" × 12'-6", 188 sq ft), BEDROOM 2 (12'-6" × 12'-6", 156 sq ft), BEDROOM 3 (12'-6" × 12'-6", 156 sq ft), GREAT ROOM & DINING (25'-0" × 15'-6", 388 sq ft), BATH & LAUNDRY (15'-0" × 7'-0", 105 sq ft), KITCHEN & ISLAND (15'-0" × 8'-6", 128 sq ft). Plumbing rough-ins are consolidated across BATH & LAUNDRY, KITCHEN & ISLAND to minimize sub-slab trenching and manifold pipe runs. Sleeping quarters (PRIMARY SUITE at 188 sq ft; BEDROOM 2 at 156 sq ft; BEDROOM 3 at 156 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 2x6 advanced framing w/ steel moment frame view wall bearing on 136 linear feet of 6" exterior wall framing (~160 framing studs/posts) and 118 linear feet of interior partitions. The 2.5:12 single-slope shed metal roof w/ deep cantilevered overhangs requires approximately 1,281 sq ft of roofing material (15 roofing squares), while the insulated concrete slab w/ radiant floor heating prep pours at an estimated 22 cubic yards of 4,000-PSI concrete.

Frequently Asked Questions • Plan HG-1660

Building costs, foundation specs, egress & CAD customization questions

How much does it cost to build the 40x28 1,121 Sq Ft (28x40) 3 Bed 2 Bath Modern Cabin Floor Plan (HG-1660)?

Based on current national residential construction data for modern cabin structures, the dried-in structural shell for Plan HG-1660 (1,120 sq ft base footprint) ranges from $49,500 to $63,000 ($46/sq ft baseline). A complete turnkey build—including the 22-yard concrete foundation, 118 linear feet of interior framing, MEP rough-ins for 2 bath(s), and interior finishes across 1,121 sq ft of heated space—ranges from $193,000 to $235,000. 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 1,121 sq ft 3-bedroom layout?

Plan HG-1660 features 6 architecturally solved spaces inside its 40' × 28' footprint: PRIMARY SUITE (15'-0" × 12'-6", 188 sq ft), BEDROOM 2 (12'-6" × 12'-6", 156 sq ft), BEDROOM 3 (12'-6" × 12'-6", 156 sq ft), GREAT ROOM & DINING (25'-0" × 15'-6", 388 sq ft), BATH & LAUNDRY (15'-0" × 7'-0", 105 sq ft), KITCHEN & ISLAND (15'-0" × 8'-6", 128 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' × 28' 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" × 28'-0" structural grid (136 LF perimeter) with clear-span 2.5:12 trusses, a local structural engineer or building kit supplier can adapt the blueprint for 2x6 Advanced Framing w/ Steel Moment Frame View Wall, 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-1660?

Downloading Plan HG-1660 provides the high-resolution scalable vector floor plan (.SVG) with crisp architectural lineweights, exterior dimension strings (40'-0" × 28'-0"), room-by-room callouts, door swing arcs, and window schedules, plus instant browser printing for contractor bidding and preliminary municipal zoning review.