20' × 24' Garage + Apt
Private Stair Entry + Balcony Loft
Private Stair Entry + Balcony Loft • 625 sq ft heated + 336 sq ft 1-bay shop • 1 Bed, 1 Bath
$31,500 – $40,000
Framing package, roof trusses & exterior shell for 480 sq ft base.
$70,500 – $92,500
Saves ~$31,500 by managing local slab & interior trades.
$102,000 – $124,000
Full general contractor finish including slab, HVAC, kitchen & baths.
$90,400 financed (30-Yr)
Scalable 2D architectural vector drawing with exterior and room dimensions, door swings, and fixture layout. Opens in AutoCAD, Illustrator, Inkscape, or any browser.
Concrete volume (14 yd³), roof surface (~646 sq ft), wall framing & architectural notes
| Building Package | Specification | Quantity | Est. Range |
|---|---|---|---|
| Structural Shell & Trusses | 30'×16' 2x6 Lower Walls + 14" Engineered Wood I-Joist Floor System | 480 sq ft shell kit | $31,500 – $40,000 |
| Concrete Slab & Grade Beams | 6" Reinforced Garage Slab w/ Perimeter Footings & Apron | 14 Cubic Yards (4,000 PSI) | $5,500 – $7,000 |
| Roofing & Underlayment | Dormered Gable or Gambrel Roof (8:12 / 4:12 Shed Dormers) (8:12 Pitch) | 7 Roofing Squares (700 sq ft) | $2,940 – $4,760 |
| Closed-Cell Spray Foam / Insulation | 3" Closed-Cell Wall & Roof Deck Thermal Envelope (R-21 to R-38) | 6,900 Board Feet | $9,315 – $12,765 |
| 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 |
Plan HG-2718 (481 Sq Ft (16×30) 1 Bed, 1 Bath Garage + Apt Floor Plan) is an IRC R304/R310-vetted garage with loft / apartment above blueprint engineered around a 30'-0" × 16'-0" structural grid (480 sq ft base footprint, 0.53:1 Square-Bay Proportion). Configured on the Private Stair Entry + Balcony Loft topology, this layout delivers 625 sq ft of conditioned residential living area paired with a 336 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" × 16'-0", 336 sq ft), UTILITY & GEAR (9'-0" × 7'-0", 63 sq ft), FOYER & STAIRS (9'-0" × 9'-0", 81 sq ft), PRIMARY SUITE (15'-6" × 7'-6", 116 sq ft), WALK-IN CLOSET (6'-0" × 7'-6", 45 sq ft), FULL BATH (8'-6" × 7'-6", 64 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 116 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 92 linear feet of 6" exterior wall framing (~142 framing studs/posts) and 129 linear feet of interior partitions. The 8:12 dormered gable or gambrel roof (8:12 / 4:12 shed dormers) requires approximately 646 sq ft of roofing material (7 roofing squares), while the 6" reinforced garage slab w/ perimeter footings & apron pours at an estimated 14 cubic yards of 4,000-PSI concrete.
Building costs, foundation specs, egress & CAD customization questions
Based on current national residential construction data for garage with loft / apartment above structures, the dried-in structural shell for Plan HG-2718 (480 sq ft base footprint) ranges from $31,500 to $40,000 ($38/sq ft baseline). A complete turnkey build—including the 14-yard concrete foundation, 129 linear feet of interior framing, MEP rough-ins for 1 bath(s), and interior finishes across 625 sq ft of heated space plus the 336 sq ft shop bay—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.
Plan HG-2718 features 9 architecturally solved spaces inside its 30' × 16' footprint: 1-BAY GARAGE (21'-0" × 16'-0", 336 sq ft), UTILITY & GEAR (9'-0" × 7'-0", 63 sq ft), FOYER & STAIRS (9'-0" × 9'-0", 81 sq ft), PRIMARY SUITE (15'-6" × 7'-6", 116 sq ft), WALK-IN CLOSET (6'-0" × 7'-6", 45 sq ft), FULL BATH (8'-6" × 7'-6", 64 sq ft), LIVING & DINING (12'-0" × 8'-6", 102 sq ft), KITCHEN & ISLAND (9'-0" × 8'-6", 77 sq ft), STAIR LANDING (9'-0" × 8'-6", 77 sq ft). Every habitable room meets or exceeds IRC R304 minimum area (70+ sq ft) and minimum horizontal dimension (7'-0"+) requirements.
Yes. Because the outer envelope is engineered on an even 30'-0" × 16'-0" structural grid (92 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).
Downloading Plan HG-2718 provides the high-resolution scalable vector floor plan (.SVG) with crisp architectural lineweights, exterior dimension strings (30'-0" × 16'-0"), room-by-room callouts, door swing arcs, and window schedules, plus instant browser printing for contractor bidding and preliminary municipal zoning review.


Private Stair Entry + Balcony Loft
Private Stair Entry + Balcony Loft
Private Stair Entry + Balcony Loft
Private Stair Entry + Balcony Loft
Private Stair Entry + Balcony Loft
Private Stair Entry + Balcony Loft