Plan HG-1805•Duplex / Multi-Gen•36' × 30' Footprint

1,080 Sq Ft (30x36) 2 Bed 2 Bath Duplex / Multi-Gen Floor Plan

1,080 sq ft heated living • 2 Bedrooms, 2 Baths • Free 2D CAD Blueprint (.SVG)

Download Free CAD (.SVG)

Room Dimensions & Zones

36' × 30' Shell

UNIT A SUITE

135 sq ft

10'-0" × 13'-6"

UNIT A BATH

108 sq ft

8'-0" × 13'-6"

UNIT A LIVING

165 sq ft

10'-0" × 16'-6"

UNIT A KITCHEN

132 sq ft

8'-0" × 16'-6"

UNIT B BATH

108 sq ft

8'-0" × 13'-6"

UNIT B SUITE

135 sq ft

10'-0" × 13'-6"

UNIT B KITCHEN

132 sq ft

8'-0" × 16'-6"

UNIT B LIVING

165 sq ft

10'-0" × 16'-6"

Build Cost Estimator

Estimated Cost to Build (36' × 30' Duplex / Multi-Gen)

Region:

Shell / Building Kit

$43,000 – $55,000

Framing package, roof trusses & exterior shell for 1,080 sq ft base.

Owner-Builder

$111,500 – $146,500

Saves ~$50,500 by managing local slab & interior trades.

Turnkey Builder

$162,000 – $197,000

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

Est. Monthly Payment

$931 / mo

$143,600 financed (30-Yr)

Down Payment:20%

Interest Rate:6.75%

Free Vector CAD Blueprint • Plan HG-1805

Download 36' × 30' Duplex / Multi-Gen 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 (21 yd³), roof surface (~1,310 sq ft), wall framing & architectural notes

Building Package	Specification	Quantity	Est. Range
Structural Shell & Trusses	36'×30' 2x6 Exterior + Double-Stud Insulated Acoustic Party Wall	1,080 sq ft shell kit	$43,000 – $55,000
Concrete Slab & Grade Beams	Monolithic Concrete Slab w/ Dual Sewer/Water Stub-Outs	21 Cubic Yards (4,000 PSI)	$11,000 – $14,000
Roofing & Underlayment	Architectural Shingle or Standing Seam Metal Hip/Gable (5:12 Pitch)	16 Roofing Squares (1,600 sq ft)	$6,720 – $10,880
Closed-Cell Spray Foam / Insulation	3" Closed-Cell Wall & Roof Deck Thermal Envelope (R-21 to R-38)	7,488 Board Feet	$10,109 – $13,853
Windows & Exterior Doors	Low-E Argon Black Architectural Glazing + 36" Fiberglass Entry	4 Windows • 6 Doors	$3,800 – $6,020
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

132 Linear Ft

Interior Partitions

~138 Linear Ft

Est. Concrete Slab

21 Cubic Yards

Roof Deck Area

~1,310 Sq Ft

Plan HG-1805 (1,080 Sq Ft (30x36) 2 Bed 2 Bath Duplex / Multi-Gen Floor Plan) is an IRC R304/R310-vetted duplex / multi-gen blueprint engineered around a 36'-0" × 30'-0" structural grid (1,080 sq ft base footprint, 0.83:1 Square-Bay Proportion). Configured on the STC-60 Mirrored Acoustic Party-Wall Duplex topology, this layout delivers 1,080 sq ft of conditioned residential living area and 216 sq ft of covered outdoor porch deck.

Inside the conditioned envelope, the floor plan is organized into 8 distinct architectural zones: UNIT A SUITE (10'-0" × 13'-6", 135 sq ft), UNIT A BATH (8'-0" × 13'-6", 108 sq ft), UNIT A LIVING (10'-0" × 16'-6", 165 sq ft), UNIT A KITCHEN (8'-0" × 16'-6", 132 sq ft), UNIT B BATH (8'-0" × 13'-6", 108 sq ft), UNIT B SUITE (10'-0" × 13'-6", 135 sq ft). Plumbing rough-ins are consolidated across UNIT A BATH, UNIT A KITCHEN, UNIT B BATH, UNIT B KITCHEN to minimize sub-slab trenching and manifold pipe runs. Sleeping quarters (UNIT A SUITE at 135 sq ft; UNIT B SUITE at 135 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 exterior + double-stud insulated acoustic party wall bearing on 132 linear feet of 6" exterior wall framing (~152 framing studs/posts) and 138 linear feet of interior partitions. The 5:12 architectural shingle or standing seam metal hip/gable requires approximately 1,310 sq ft of roofing material (16 roofing squares), while the monolithic concrete slab w/ dual sewer/water stub-outs pours at an estimated 21 cubic yards of 4,000-PSI concrete.

Frequently Asked Questions • Plan HG-1805

Building costs, foundation specs, egress & CAD customization questions

How much does it cost to build the 36x30 1,080 Sq Ft (30x36) 2 Bed 2 Bath Duplex / Multi-Gen Floor Plan (HG-1805)?

Based on current national residential construction data for duplex / multi-gen structures, the dried-in structural shell for Plan HG-1805 (1,080 sq ft base footprint) ranges from $43,000 to $55,000 ($40/sq ft baseline). A complete turnkey build—including the 21-yard concrete foundation, 138 linear feet of interior framing, MEP rough-ins for 2 bath(s), and interior finishes across 1,080 sq ft of heated space—ranges from $162,000 to $197,000. 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 1,080 sq ft 2-bedroom layout?

Plan HG-1805 features 8 architecturally solved spaces inside its 36' × 30' footprint: UNIT A SUITE (10'-0" × 13'-6", 135 sq ft), UNIT A BATH (8'-0" × 13'-6", 108 sq ft), UNIT A LIVING (10'-0" × 16'-6", 165 sq ft), UNIT A KITCHEN (8'-0" × 16'-6", 132 sq ft), UNIT B BATH (8'-0" × 13'-6", 108 sq ft), UNIT B SUITE (10'-0" × 13'-6", 135 sq ft), UNIT B KITCHEN (8'-0" × 16'-6", 132 sq ft), UNIT B LIVING (10'-0" × 16'-6", 165 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' × 30' 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" × 30'-0" structural grid (132 LF perimeter) with clear-span 5:12 trusses, a local structural engineer or building kit supplier can adapt the blueprint for 2x6 Exterior + Double-Stud Insulated Acoustic Party 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-1805?

Downloading Plan HG-1805 provides the high-resolution scalable vector floor plan (.SVG) with crisp architectural lineweights, exterior dimension strings (36'-0" × 30'-0"), room-by-room callouts, door swing arcs, and window schedules, plus instant browser printing for contractor bidding and preliminary municipal zoning review.