Plan HG-1810•Backyard ADU / Granny Flat•36' × 30' Footprint

1,080 Sq Ft (30x36) 2 Bed 2 Bath Backyard ADU / Granny Flat Floor Plan (Split-Bedroom Privacy Wing + Center Great Room)

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

PRIMARY SUITE

198 sq ft

11'-0" × 18'-0"

EN-SUITE BATH

132 sq ft

11'-0" × 12'-0"

KITCHEN & ISLAND

195 sq ft

15'-0" × 13'-0"

GREAT ROOM

255 sq ft

15'-0" × 17'-0"

BEDROOM 2

175 sq ft

10'-0" × 17'-6"

HALL BATH

125 sq ft

10'-0" × 12'-6"

Build Cost Estimator

Estimated Cost to Build (36' × 30' Backyard ADU / Granny Flat)

Region:

Shell / Building Kit

$48,500 – $62,500

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

Owner-Builder

$136,000 – $179,000

Saves ~$61,000 by managing local slab & interior trades.

Turnkey Builder

$197,000 – $240,000

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

Est. Monthly Payment

$1,134 / mo

$174,800 financed (30-Yr)

Down Payment:20%

Interest Rate:6.75%

Free Vector CAD Blueprint • Plan HG-1810

Download 36' × 30' Backyard ADU / Granny Flat 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 (~1,247 sq ft), wall framing & architectural notes

Building Package	Specification	Quantity	Est. Range
Structural Shell & Trusses	36'×30' 2x6 Dimensional Lumber Framing / Panelized SIP Option	1,080 sq ft shell kit	$48,500 – $62,500
Concrete Slab & Grade Beams	Stem Wall or Monolithic Concrete Slab-on-Grade	21 Cubic Yards (4,000 PSI)	$10,250 – $13,000
Roofing & Underlayment	Architectural Standing-Seam Shed / Low-Slope Gable (3:12 Pitch)	14 Roofing Squares (1,400 sq ft)	$5,880 – $9,520
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 • 5 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

~117 Linear Ft

Est. Concrete Slab

21 Cubic Yards

Roof Deck Area

~1,247 Sq Ft

Plan HG-1810 (1,080 Sq Ft (30x36) 2 Bed 2 Bath Backyard ADU / Granny Flat Floor Plan (Split-Bedroom Privacy Wing + Center Great Room)) is an IRC R304/R310-vetted backyard adu / granny flat 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 Split-Bedroom Privacy Wing + Center Great Room topology, this layout delivers 1,080 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 6 distinct architectural zones: PRIMARY SUITE (11'-0" × 18'-0", 198 sq ft), EN-SUITE BATH (11'-0" × 12'-0", 132 sq ft), KITCHEN & ISLAND (15'-0" × 13'-0", 195 sq ft), GREAT ROOM (15'-0" × 17'-0", 255 sq ft), BEDROOM 2 (10'-0" × 17'-6", 175 sq ft), HALL BATH (10'-0" × 12'-6", 125 sq ft). Plumbing rough-ins are consolidated across EN-SUITE BATH, KITCHEN & ISLAND, HALL BATH to minimize sub-slab trenching and manifold pipe runs. Sleeping quarters (PRIMARY SUITE at 198 sq ft; BEDROOM 2 at 175 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 dimensional lumber framing / panelized sip option bearing on 132 linear feet of 6" exterior wall framing (~148 framing studs/posts) and 117 linear feet of interior partitions. The 3:12 architectural standing-seam shed / low-slope gable requires approximately 1,247 sq ft of roofing material (14 roofing squares), while the stem wall or monolithic concrete slab-on-grade pours at an estimated 21 cubic yards of 4,000-PSI concrete.

Frequently Asked Questions • Plan HG-1810

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 Backyard ADU / Granny Flat Floor Plan (Split-Bedroom Privacy Wing + Center Great Room) (HG-1810)?

Based on current national residential construction data for backyard adu / granny flat structures, the dried-in structural shell for Plan HG-1810 (1,080 sq ft base footprint) ranges from $48,500 to $62,500 ($48/sq ft baseline). A complete turnkey build—including the 21-yard concrete foundation, 117 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 $197,000 to $240,000. 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-1810 features 6 architecturally solved spaces inside its 36' × 30' footprint: PRIMARY SUITE (11'-0" × 18'-0", 198 sq ft), EN-SUITE BATH (11'-0" × 12'-0", 132 sq ft), KITCHEN & ISLAND (15'-0" × 13'-0", 195 sq ft), GREAT ROOM (15'-0" × 17'-0", 255 sq ft), BEDROOM 2 (10'-0" × 17'-6", 175 sq ft), HALL BATH (10'-0" × 12'-6", 125 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 3:12 trusses, a local structural engineer or building kit supplier can adapt the blueprint for 2x6 Dimensional Lumber Framing / Panelized SIP Option, 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-1810?

Downloading Plan HG-1810 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.