Plan HG-1138•Garage with Loft / Apartment Above•36' × 18' Footprint

648 Sq Ft (18x36) 2 Bed 1 Bath Garage with Loft / Apartment Above Floor Plan with Apartment Above (Drive-Through Carriage Loft + Primary Suite)

810 sq ft heated living + 486 sq ft 1-bay shop • 2 Bedrooms, 1 Bath • Free 2D CAD Blueprint (.SVG)

Download Free CAD (.SVG)

Room Dimensions & Zones

36' × 18' Shell

1-BAY GARAGE

486 sq ft

27'-0" × 18'-0"

UTILITY & GEAR

72 sq ft

9'-0" × 8'-0"

FOYER & STAIRS

90 sq ft

9'-0" × 10'-0"

PRIMARY SUITE

123 sq ft

14'-6" × 8'-6"

BEDROOM 2

106 sq ft

12'-6" × 8'-6"

FULL BATH

77 sq ft

9'-0" × 8'-6"

LIVING & DINING

147 sq ft

15'-6" × 9'-6"

KITCHEN & ISLAND

109 sq ft

11'-6" × 9'-6"

STAIR LANDING

86 sq ft

9'-0" × 9'-6"

Build Cost Estimator

Estimated Cost to Build (36' × 18' Garage with Loft / Apartment Above)

Region:

Shell / Building Kit

$42,000 – $53,500

Framing package, roof trusses & exterior shell for 648 sq ft base.

Owner-Builder

$93,000 – $122,000

Saves ~$42,000 by managing local slab & interior trades.

Turnkey Builder

$135,000 – $164,000

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

Est. Monthly Payment

$776 / mo

$119,600 financed (30-Yr)

Down Payment:20%

Interest Rate:6.75%

Free Vector CAD Blueprint • Plan HG-1138

Download 36' × 18' 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 (17 yd³), roof surface (~872 sq ft), wall framing & architectural notes

Building Package	Specification	Quantity	Est. Range
Structural Shell & Trusses	36'×18' 2x6 Lower Walls + 14" Engineered Wood I-Joist Floor System	648 sq ft shell kit	$42,000 – $53,500
Concrete Slab & Grade Beams	6" Reinforced Garage Slab w/ Perimeter Footings & Apron	17 Cubic Yards (4,000 PSI)	$7,500 – $9,500
Roofing & Underlayment	Dormered Gable or Gambrel Roof (8:12 / 4:12 Shed Dormers) (8:12 Pitch)	9 Roofing Squares (900 sq ft)	$3,780 – $6,120
Closed-Cell Spray Foam / Insulation	3" Closed-Cell Wall & Roof Deck Thermal Envelope (R-21 to R-38)	8,392 Board Feet	$11,329 – $15,525
Windows & Exterior Doors	Low-E Argon Black Architectural Glazing + Insulated Overhead Shop Door(s)	9 Windows • 8 Doors	$9,050 – $14,220
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

108 Linear Ft

Interior Partitions

~149 Linear Ft

Est. Concrete Slab

17 Cubic Yards

Roof Deck Area

~872 Sq Ft

Plan HG-1138 (648 Sq Ft (18x36) 2 Bed 1 Bath Garage with Loft / Apartment Above Floor Plan with Apartment Above (Drive-Through Carriage Loft + Primary Suite)) is an IRC R304/R310-vetted garage with loft / apartment above blueprint engineered around a 36'-0" × 18'-0" structural grid (648 sq ft base footprint, 0.5:1 Square-Bay Proportion). Configured on the Drive-Through Carriage Loft + Primary Suite topology, this layout delivers 810 sq ft of conditioned residential living area paired with a 486 sq ft fire-separated workshop/garage bay and 93 sq ft of covered outdoor porch deck.

Inside the conditioned envelope, the floor plan is organized into 9 distinct architectural zones: 1-BAY GARAGE (27'-0" × 18'-0", 486 sq ft), UTILITY & GEAR (9'-0" × 8'-0", 72 sq ft), FOYER & STAIRS (9'-0" × 10'-0", 90 sq ft), PRIMARY SUITE (14'-6" × 8'-6", 123 sq ft), BEDROOM 2 (12'-6" × 8'-6", 106 sq ft), FULL BATH (9'-0" × 8'-6", 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 123 sq ft; BEDROOM 2 at 106 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 36' clear-span width utilizes 2x6 lower walls + 14" engineered wood i-joist floor system bearing on 108 linear feet of 6" exterior wall framing (~160 framing studs/posts) and 149 linear feet of interior partitions. The 8:12 dormered gable or gambrel roof (8:12 / 4:12 shed dormers) requires approximately 872 sq ft of roofing material (9 roofing squares), while the 6" reinforced garage slab w/ perimeter footings & apron pours at an estimated 17 cubic yards of 4,000-PSI concrete.

Frequently Asked Questions • Plan HG-1138

Building costs, foundation specs, egress & CAD customization questions

How much does it cost to build the 36x18 648 Sq Ft (18x36) 2 Bed 1 Bath Garage with Loft / Apartment Above Floor Plan with Apartment Above (Drive-Through Carriage Loft + Primary Suite) (HG-1138)?

Based on current national residential construction data for garage with loft / apartment above structures, the dried-in structural shell for Plan HG-1138 (648 sq ft base footprint) ranges from $42,000 to $53,500 ($38/sq ft baseline). A complete turnkey build—including the 17-yard concrete foundation, 149 linear feet of interior framing, MEP rough-ins for 1 bath(s), and interior finishes across 810 sq ft of heated space plus the 486 sq ft shop bay—ranges from $135,000 to $164,000. 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 810 sq ft 2-bedroom layout?

Plan HG-1138 features 9 architecturally solved spaces inside its 36' × 18' footprint: 1-BAY GARAGE (27'-0" × 18'-0", 486 sq ft), UTILITY & GEAR (9'-0" × 8'-0", 72 sq ft), FOYER & STAIRS (9'-0" × 10'-0", 90 sq ft), PRIMARY SUITE (14'-6" × 8'-6", 123 sq ft), BEDROOM 2 (12'-6" × 8'-6", 106 sq ft), FULL BATH (9'-0" × 8'-6", 77 sq ft), LIVING & DINING (15'-6" × 9'-6", 147 sq ft), KITCHEN & ISLAND (11'-6" × 9'-6", 109 sq ft), STAIR LANDING (9'-0" × 9'-6", 86 sq ft). Every habitable room meets or exceeds IRC R304 minimum area (70+ sq ft) and minimum horizontal dimension (7'-0"+) requirements.

Can this 36' × 18' floor plan be built with post-frame, red-iron steel, or 2x6 stick framing?

Yes. Because the outer envelope is engineered on an even 36'-0" × 18'-0" structural grid (108 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-1138?

Downloading Plan HG-1138 provides the high-resolution scalable vector floor plan (.SVG) with crisp architectural lineweights, exterior dimension strings (36'-0" × 18'-0"), room-by-room callouts, door swing arcs, and window schedules, plus instant browser printing for contractor bidding and preliminary municipal zoning review.