Plan HG-1171•Garage with Loft / Apartment Above•30' × 20' Footprint

601 Sq Ft (20x30) 1 Bed 1 Bath Garage with Loft / Apartment Above Floor Plan with Apartment Above

781 sq ft heated living + 420 sq ft 1-bay shop • 1 Bedroom, 1 Bath • Free 2D CAD Blueprint (.SVG)

Download Free CAD (.SVG)

Room Dimensions & Zones

30' × 20' Shell

1-BAY GARAGE

420 sq ft

21'-0" × 20'-0"

UTILITY & GEAR

81 sq ft

9'-0" × 9'-0"

FOYER & STAIRS

99 sq ft

9'-0" × 11'-0"

PRIMARY SUITE

140 sq ft

15'-6" × 9'-0"

WALK-IN CLOSET

54 sq ft

6'-0" × 9'-0"

FULL BATH

77 sq ft

8'-6" × 9'-0"

LIVING & DINING

132 sq ft

12'-0" × 11'-0"

KITCHEN & ISLAND

99 sq ft

9'-0" × 11'-0"

STAIR LANDING

99 sq ft

9'-0" × 11'-0"

Build Cost Estimator

Estimated Cost to Build (30' × 20' Garage with Loft / Apartment Above)

Region:

Shell / Building Kit

$39,000 – $50,000

Framing package, roof trusses & exterior shell for 600 sq ft base.

Owner-Builder

$87,500 – $114,500

Saves ~$39,500 by managing local slab & interior trades.

Turnkey Builder

$127,000 – $154,000

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

Est. Monthly Payment

$729 / mo

$112,400 financed (30-Yr)

Down Payment:20%

Interest Rate:6.75%

Free Vector CAD Blueprint • Plan HG-1171

Download 30' × 20' Garage with Loft / Apartment Above 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 (16 yd³), roof surface (~808 sq ft), wall framing & architectural notes

Building Package	Specification	Quantity	Est. Range
Structural Shell & Trusses	30'×20' 2x6 Lower Walls + 14" Engineered Wood I-Joist Floor System	600 sq ft shell kit	$39,000 – $50,000
Concrete Slab & Grade Beams	6" Reinforced Garage Slab w/ Perimeter Footings & Apron	16 Cubic Yards (4,000 PSI)	$6,750 – $8,750
Roofing & Underlayment	Dormered Gable or Gambrel Roof (8:12 / 4:12 Shed Dormers) (8:12 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)	7,770 Board Feet	$10,490 – $14,375
Windows & Exterior Doors	Low-E Argon Black Architectural Glazing + Insulated Overhead Shop Door(s)	8 Windows • 8 Doors	$8,400 – $13,240
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

100 Linear Ft

Interior Partitions

~143 Linear Ft

Est. Concrete Slab

16 Cubic Yards

Roof Deck Area

~808 Sq Ft

Plan HG-1171 (601 Sq Ft (20x30) 1 Bed 1 Bath Garage with Loft / Apartment Above Floor Plan with Apartment Above) is an IRC R304/R310-vetted garage with loft / apartment above blueprint engineered around a 30'-0" × 20'-0" structural grid (600 sq ft base footprint, 0.67:1 Square-Bay Proportion). Configured on the Side-Vestibule Garage + Balcony Apartment topology, this layout delivers 781 sq ft of conditioned residential living area paired with a 420 sq ft fire-separated workshop/garage bay and 72 sq ft of covered outdoor porch deck.

Inside the conditioned envelope, the floor plan is organized into 9 distinct architectural zones: 1-BAY GARAGE (21'-0" × 20'-0", 420 sq ft), UTILITY & GEAR (9'-0" × 9'-0", 81 sq ft), FOYER & STAIRS (9'-0" × 11'-0", 99 sq ft), PRIMARY SUITE (15'-6" × 9'-0", 140 sq ft), WALK-IN CLOSET (6'-0" × 9'-0", 54 sq ft), FULL BATH (8'-6" × 9'-0", 77 sq ft). Plumbing rough-ins are consolidated across UTILITY & GEAR, FULL BATH, KITCHEN & ISLAND to minimize sub-slab trenching and manifold pipe runs. Sleeping quarters (PRIMARY SUITE at 140 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 30' clear-span width utilizes 2x6 lower walls + 14" engineered wood i-joist floor system bearing on 100 linear feet of 6" exterior wall framing (~149 framing studs/posts) and 143 linear feet of interior partitions. The 8:12 dormered gable or gambrel roof (8:12 / 4:12 shed dormers) requires approximately 808 sq ft of roofing material (8 roofing squares), while the 6" reinforced garage slab w/ perimeter footings & apron pours at an estimated 16 cubic yards of 4,000-PSI concrete.

Frequently Asked Questions • Plan HG-1171

Building costs, foundation specs, egress & CAD customization questions

How much does it cost to build the 30x20 601 Sq Ft (20x30) 1 Bed 1 Bath Garage with Loft / Apartment Above Floor Plan with Apartment Above (HG-1171)?

Based on current national residential construction data for garage with loft / apartment above structures, the dried-in structural shell for Plan HG-1171 (600 sq ft base footprint) ranges from $39,000 to $50,000 ($38/sq ft baseline). A complete turnkey build—including the 16-yard concrete foundation, 143 linear feet of interior framing, MEP rough-ins for 1 bath(s), and interior finishes across 781 sq ft of heated space plus the 420 sq ft shop bay—ranges from $127,000 to $154,000. 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 781 sq ft 1-bedroom layout?

Plan HG-1171 features 9 architecturally solved spaces inside its 30' × 20' footprint: 1-BAY GARAGE (21'-0" × 20'-0", 420 sq ft), UTILITY & GEAR (9'-0" × 9'-0", 81 sq ft), FOYER & STAIRS (9'-0" × 11'-0", 99 sq ft), PRIMARY SUITE (15'-6" × 9'-0", 140 sq ft), WALK-IN CLOSET (6'-0" × 9'-0", 54 sq ft), FULL BATH (8'-6" × 9'-0", 77 sq ft), LIVING & DINING (12'-0" × 11'-0", 132 sq ft), KITCHEN & ISLAND (9'-0" × 11'-0", 99 sq ft), STAIR LANDING (9'-0" × 11'-0", 99 sq ft). Every habitable room meets or exceeds IRC R304 minimum area (70+ sq ft) and minimum horizontal dimension (7'-0"+) requirements.

Can this 30' × 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 30'-0" × 20'-0" structural grid (100 LF perimeter) with clear-span 8:12 trusses, a local structural engineer or building kit supplier can adapt the blueprint for 2x6 Lower Walls + 14" Engineered Wood I-Joist Floor System, 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-1171?

Downloading Plan HG-1171 provides the high-resolution scalable vector floor plan (.SVG) with crisp architectural lineweights, exterior dimension strings (30'-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.