Plan HG-1157•Tiny Home on Foundation•28' × 20' Footprint

562 Sq Ft (20x28) 1 Bed 1 Bath Tiny Home on Foundation Floor Plan

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

Download Free CAD (.SVG)

Room Dimensions & Zones

28' × 20' Shell

PRIMARY BEDROOM

158 sq ft

17'-6" × 9'-0"

BATH & LAUNDRY

95 sq ft

10'-6" × 9'-0"

GREAT ROOM & DINING

193 sq ft

17'-6" × 11'-0"

KITCHEN & ISLAND

116 sq ft

10'-6" × 11'-0"

Build Cost Estimator

Estimated Cost to Build (28' × 20' Tiny Home on Foundation)

Region:

Shell / Building Kit

$27,500 – $35,000

Framing package, roof trusses & exterior shell for 560 sq ft base.

Owner-Builder

$70,500 – $92,500

Saves ~$31,500 by managing local slab & interior trades.

Turnkey Builder

$102,000 – $124,000

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

Est. Monthly Payment

$586 / mo

$90,400 financed (30-Yr)

Down Payment:20%

Interest Rate:6.75%

Free Vector CAD Blueprint • Plan HG-1157

Download 28' × 20' Tiny Home on Foundation 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 (13 yd³), roof surface (~661 sq ft), wall framing & architectural notes

Building Package	Specification	Quantity	Est. Range
Structural Shell & Trusses	28'×20' 2x6 High-R-Value Stick Frame or Structural Insulated Panels (SIP)	560 sq ft shell kit	$27,500 – $35,000
Concrete Slab & Grade Beams	Permanent Frost-Protected Shallow Foundation (FPSF) Slab	13 Cubic Yards (4,000 PSI)	$5,750 – $7,250
Roofing & Underlayment	Standing Seam Gable or Shed Roof (4:12 Pitch)	8 Roofing Squares (800 sq ft)	$3,360 – $5,440
Closed-Cell Spray Foam / Insulation	3" Closed-Cell Wall & Roof Deck Thermal Envelope (R-21 to R-38)	4,668 Board Feet	$6,302 – $8,636
Windows & Exterior Doors	Low-E Argon Black Architectural Glazing + 36" Fiberglass Entry	6 Windows • 3 Doors	$5,100 – $7,980
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

96 Linear Ft

Interior Partitions

~69 Linear Ft

Est. Concrete Slab

13 Cubic Yards

Roof Deck Area

~661 Sq Ft

Plan HG-1157 (562 Sq Ft (20x28) 1 Bed 1 Bath Tiny Home on Foundation Floor Plan) is an IRC R304/R310-vetted tiny home on foundation blueprint engineered around a 28'-0" × 20'-0" structural grid (560 sq ft base footprint, 0.71:1 Square-Bay Proportion). Configured on the Consolidated Wet-Wall + Open Great Room topology, this layout delivers 562 sq ft of conditioned residential living area and 105 sq ft of covered outdoor porch deck.

Inside the conditioned envelope, the floor plan is organized into 4 distinct architectural zones: PRIMARY BEDROOM (17'-6" × 9'-0", 158 sq ft), BATH & LAUNDRY (10'-6" × 9'-0", 95 sq ft), GREAT ROOM & DINING (17'-6" × 11'-0", 193 sq ft), KITCHEN & ISLAND (10'-6" × 11'-0", 116 sq ft). Plumbing rough-ins are consolidated across BATH & LAUNDRY, KITCHEN & ISLAND to minimize sub-slab trenching and manifold pipe runs. Sleeping quarters (PRIMARY BEDROOM at 158 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 28' clear-span width utilizes 2x6 high-r-value stick frame or structural insulated panels (sip) bearing on 96 linear feet of 6" exterior wall framing (~118 framing studs/posts) and 69 linear feet of interior partitions. The 4:12 standing seam gable or shed roof requires approximately 661 sq ft of roofing material (8 roofing squares), while the permanent frost-protected shallow foundation (fpsf) slab pours at an estimated 13 cubic yards of 4,000-PSI concrete.

Frequently Asked Questions • Plan HG-1157

Building costs, foundation specs, egress & CAD customization questions

How much does it cost to build the 28x20 562 Sq Ft (20x28) 1 Bed 1 Bath Tiny Home on Foundation Floor Plan (HG-1157)?

Based on current national residential construction data for tiny home on foundation structures, the dried-in structural shell for Plan HG-1157 (560 sq ft base footprint) ranges from $27,500 to $35,000 ($50/sq ft baseline). A complete turnkey build—including the 13-yard concrete foundation, 69 linear feet of interior framing, MEP rough-ins for 1 bath(s), and interior finishes across 562 sq ft of heated space—ranges from $102,000 to $124,000. 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 562 sq ft 1-bedroom layout?

Plan HG-1157 features 4 architecturally solved spaces inside its 28' × 20' footprint: PRIMARY BEDROOM (17'-6" × 9'-0", 158 sq ft), BATH & LAUNDRY (10'-6" × 9'-0", 95 sq ft), GREAT ROOM & DINING (17'-6" × 11'-0", 193 sq ft), KITCHEN & ISLAND (10'-6" × 11'-0", 116 sq ft). Every habitable room meets or exceeds IRC R304 minimum area (70+ sq ft) and minimum horizontal dimension (7'-0"+) requirements.

Can this 28' × 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 28'-0" × 20'-0" structural grid (96 LF perimeter) with clear-span 4:12 trusses, a local structural engineer or building kit supplier can adapt the blueprint for 2x6 High-R-Value Stick Frame or Structural Insulated Panels (SIP), 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-1157?

Downloading Plan HG-1157 provides the high-resolution scalable vector floor plan (.SVG) with crisp architectural lineweights, exterior dimension strings (28'-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.