Plan HG-2008•Modular / Prefab Cottage•54' × 30' Footprint

1,621 Sq Ft (30x54) 3 Bed 2 Bath Modular / Prefab Cottage Floor Plan (Split-Bedroom Privacy Wing + Center Great Room)

1,621 sq ft heated living • 3 Bedrooms, 2 Baths • Free 2D CAD Blueprint (.SVG)

Download Free CAD (.SVG)

Room Dimensions & Zones

54' × 30' Shell

PRIMARY SUITE

288 sq ft

16'-0" × 18'-0"

EN-SUITE BATH

192 sq ft

16'-0" × 12'-0"

KITCHEN & ISLAND

299 sq ft

23'-0" × 13'-0"

GREAT ROOM

391 sq ft

23'-0" × 17'-0"

BEDROOM 2

263 sq ft

15'-0" × 17'-6"

HALL BATH

188 sq ft

15'-0" × 12'-6"

Build Cost Estimator

Estimated Cost to Build (54' × 30' Modular / Prefab Cottage)

Region:

Shell / Building Kit

$67,500 – $86,000

Framing package, roof trusses & exterior shell for 1,620 sq ft base.

Owner-Builder

$166,000 – $219,000

Saves ~$75,000 by managing local slab & interior trades.

Turnkey Builder

$241,000 – $294,000

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

Est. Monthly Payment

$1,388 / mo

$214,000 financed (30-Yr)

Down Payment:20%

Interest Rate:6.75%

Free Vector CAD Blueprint • Plan HG-2008

Download 54' × 30' Modular / Prefab Cottage 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 (30 yd³), roof surface (~1,966 sq ft), wall framing & architectural notes

Building Package	Specification	Quantity	Est. Range
Structural Shell & Trusses	54'×30' Factory-Engineered 2x6 Modular Box System w/ Marriage Wall	1,620 sq ft shell kit	$67,500 – $86,000
Concrete Slab & Grade Beams	Stem Wall Crawlspace or Full Perimeter Foundation	30 Cubic Yards (4,000 PSI)	$15,250 – $19,500
Roofing & Underlayment	Hinged 5:12 Architectural Shingle or Metal Gable Roof (5:12 Pitch)	22 Roofing Squares (2,200 sq ft)	$9,240 – $14,960
Closed-Cell Spray Foam / Insulation	3" Closed-Cell Wall & Roof Deck Thermal Envelope (R-21 to R-38)	10,377 Board Feet	$14,009 – $19,197
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	3 Ton (36,000 BTU/hr)	$7,800 – $12,300

Exterior Perimeter

168 Linear Ft

Interior Partitions

~143 Linear Ft

Est. Concrete Slab

30 Cubic Yards

Roof Deck Area

~1,966 Sq Ft

Plan HG-2008 (1,621 Sq Ft (30x54) 3 Bed 2 Bath Modular / Prefab Cottage Floor Plan (Split-Bedroom Privacy Wing + Center Great Room)) is an IRC R304/R310-vetted modular / prefab cottage blueprint engineered around a 54'-0" × 30'-0" structural grid (1,620 sq ft base footprint, 0.56:1 Square-Bay Proportion). Configured on the Split-Bedroom Privacy Wing + Center Great Room topology, this layout delivers 1,621 sq ft of conditioned residential living area and 161 sq ft of covered outdoor porch deck.

Inside the conditioned envelope, the floor plan is organized into 6 distinct architectural zones: PRIMARY SUITE (16'-0" × 18'-0", 288 sq ft), EN-SUITE BATH (16'-0" × 12'-0", 192 sq ft), KITCHEN & ISLAND (23'-0" × 13'-0", 299 sq ft), GREAT ROOM (23'-0" × 17'-0", 391 sq ft), BEDROOM 2 (15'-0" × 17'-6", 263 sq ft), HALL BATH (15'-0" × 12'-6", 188 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 288 sq ft; BEDROOM 2 at 263 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 54' clear-span width utilizes factory-engineered 2x6 modular box system w/ marriage wall bearing on 168 linear feet of 6" exterior wall framing (~179 framing studs/posts) and 143 linear feet of interior partitions. The 5:12 hinged 5:12 architectural shingle or metal gable roof requires approximately 1,966 sq ft of roofing material (22 roofing squares), while the stem wall crawlspace or full perimeter foundation pours at an estimated 30 cubic yards of 4,000-PSI concrete.

Frequently Asked Questions • Plan HG-2008

Building costs, foundation specs, egress & CAD customization questions

How much does it cost to build the 54x30 1,621 Sq Ft (30x54) 3 Bed 2 Bath Modular / Prefab Cottage Floor Plan (Split-Bedroom Privacy Wing + Center Great Room) (HG-2008)?

Based on current national residential construction data for modular / prefab cottage structures, the dried-in structural shell for Plan HG-2008 (1,620 sq ft base footprint) ranges from $67,500 to $86,000 ($44/sq ft baseline). A complete turnkey build—including the 30-yard concrete foundation, 143 linear feet of interior framing, MEP rough-ins for 2 bath(s), and interior finishes across 1,621 sq ft of heated space—ranges from $241,000 to $294,000. 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 1,621 sq ft 3-bedroom layout?

Plan HG-2008 features 6 architecturally solved spaces inside its 54' × 30' footprint: PRIMARY SUITE (16'-0" × 18'-0", 288 sq ft), EN-SUITE BATH (16'-0" × 12'-0", 192 sq ft), KITCHEN & ISLAND (23'-0" × 13'-0", 299 sq ft), GREAT ROOM (23'-0" × 17'-0", 391 sq ft), BEDROOM 2 (15'-0" × 17'-6", 263 sq ft), HALL BATH (15'-0" × 12'-6", 188 sq ft). Every habitable room meets or exceeds IRC R304 minimum area (70+ sq ft) and minimum horizontal dimension (7'-0"+) requirements.

Can this 54' × 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 54'-0" × 30'-0" structural grid (168 LF perimeter) with clear-span 5:12 trusses, a local structural engineer or building kit supplier can adapt the blueprint for Factory-Engineered 2x6 Modular Box System w/ Marriage 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-2008?

Downloading Plan HG-2008 provides the high-resolution scalable vector floor plan (.SVG) with crisp architectural lineweights, exterior dimension strings (54'-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.