Plan HG-1069•Backyard ADU / Granny Flat•36' × 16' Footprint

578 Sq Ft (16x36) 2 Bed 1 Bath Backyard ADU / Granny Flat Floor Plan

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

Download Free CAD (.SVG)

Room Dimensions & Zones

36' × 16' Shell

PRIMARY SUITE

130 sq ft

18'-6" × 7'-0"

BEDROOM 2

123 sq ft

17'-6" × 7'-0"

GREAT ROOM & DINING

203 sq ft

22'-6" × 9'-0"

BATH & LAUNDRY

54 sq ft

13'-6" × 4'-0"

KITCHEN & ISLAND

68 sq ft

13'-6" × 5'-0"

Build Cost Estimator

Estimated Cost to Build (36' × 16' Backyard ADU / Granny Flat)

Region:

Shell / Building Kit

$27,500 – $35,500

Framing package, roof trusses & exterior shell for 576 sq ft base.

Owner-Builder

$74,500 – $98,500

Saves ~$33,500 by managing local slab & interior trades.

Turnkey Builder

$108,000 – $132,000

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

Est. Monthly Payment

$623 / mo

$96,000 financed (30-Yr)

Down Payment:20%

Interest Rate:6.75%

Free Vector CAD Blueprint • Plan HG-1069

Download 36' × 16' 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 (13 yd³), roof surface (~665 sq ft), wall framing & architectural notes

Building Package	Specification	Quantity	Est. Range
Structural Shell & Trusses	36'×16' 2x6 Dimensional Lumber Framing / Panelized SIP Option	576 sq ft shell kit	$27,500 – $35,500
Concrete Slab & Grade Beams	Stem Wall or Monolithic Concrete Slab-on-Grade	13 Cubic Yards (4,000 PSI)	$6,000 – $7,750
Roofing & Underlayment	Architectural Standing-Seam Shed / Low-Slope Gable (3:12 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)	4,951 Board Feet	$6,684 – $9,159
Windows & Exterior Doors	Low-E Argon Black Architectural Glazing + 36" Fiberglass Entry	5 Windows • 4 Doors	$4,450 – $7,000
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

104 Linear Ft

Interior Partitions

~85 Linear Ft

Est. Concrete Slab

13 Cubic Yards

Roof Deck Area

~665 Sq Ft

Plan HG-1069 (578 Sq Ft (16x36) 2 Bed 1 Bath Backyard ADU / Granny Flat Floor Plan) is an IRC R304/R310-vetted backyard adu / granny flat blueprint engineered around a 36'-0" × 16'-0" structural grid (576 sq ft base footprint, 0.44:1 Square-Bay Proportion). Configured on the Consolidated Wet-Wall + Open Great Room topology, this layout delivers 578 sq ft of conditioned residential living area and 135 sq ft of covered outdoor porch deck.

Inside the conditioned envelope, the floor plan is organized into 5 distinct architectural zones: PRIMARY SUITE (18'-6" × 7'-0", 130 sq ft), BEDROOM 2 (17'-6" × 7'-0", 123 sq ft), GREAT ROOM & DINING (22'-6" × 9'-0", 203 sq ft), BATH & LAUNDRY (13'-6" × 4'-0", 54 sq ft), KITCHEN & ISLAND (13'-6" × 5'-0", 68 sq ft). Plumbing rough-ins are consolidated across BATH & LAUNDRY, KITCHEN & ISLAND to minimize sub-slab trenching and manifold pipe runs. Sleeping quarters (PRIMARY SUITE at 130 sq ft; BEDROOM 2 at 123 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 104 linear feet of 6" exterior wall framing (~124 framing studs/posts) and 85 linear feet of interior partitions. The 3:12 architectural standing-seam shed / low-slope gable requires approximately 665 sq ft of roofing material (9 roofing squares), while the stem wall or monolithic concrete slab-on-grade pours at an estimated 13 cubic yards of 4,000-PSI concrete.

Frequently Asked Questions • Plan HG-1069

Building costs, foundation specs, egress & CAD customization questions

How much does it cost to build the 36x16 578 Sq Ft (16x36) 2 Bed 1 Bath Backyard ADU / Granny Flat Floor Plan (HG-1069)?

Based on current national residential construction data for backyard adu / granny flat structures, the dried-in structural shell for Plan HG-1069 (576 sq ft base footprint) ranges from $27,500 to $35,500 ($48/sq ft baseline). A complete turnkey build—including the 13-yard concrete foundation, 85 linear feet of interior framing, MEP rough-ins for 1 bath(s), and interior finishes across 578 sq ft of heated space—ranges from $108,000 to $132,000. 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 578 sq ft 2-bedroom layout?

Plan HG-1069 features 5 architecturally solved spaces inside its 36' × 16' footprint: PRIMARY SUITE (18'-6" × 7'-0", 130 sq ft), BEDROOM 2 (17'-6" × 7'-0", 123 sq ft), GREAT ROOM & DINING (22'-6" × 9'-0", 203 sq ft), BATH & LAUNDRY (13'-6" × 4'-0", 54 sq ft), KITCHEN & ISLAND (13'-6" × 5'-0", 68 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' × 16' 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" × 16'-0" structural grid (104 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-1069?

Downloading Plan HG-1069 provides the high-resolution scalable vector floor plan (.SVG) with crisp architectural lineweights, exterior dimension strings (36'-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.