homestead.fyi / EXTBAY

Hutch Extension Bay

A 36 x 30 in compartment that bolts to the end of any hutch: a floor frame, legs, a cloth floor, a side, a back, a door and a roof section.

Draft plan, generated from the model. Not yet build-tested.

1 compartment, 36 inAdds

7.5 sq ftFloor

4 to 6 hrBuild time

$175.21Materials

Drawings All dimensions in inches

3D viewfinished

3D view, framingsiding and roof removed

Front elevation

Right elevation

Plan viewfrom above

Cut list: lumber Long-point lengths; angles noted

Qty	Stock	Length	Part	Cut
1	2x2	36	Front top rail	flat
1	2x2	36	Back top rail	flat
2	2x2	33	Door rail	laid flat
1	2x2	20	Front upright
1	2x2	17	Back upright
2	2x2	14	Door stile
1	2x4 PT	36	Front rim	on edge
1	2x4 PT	36	Back rim	on edge
1	2x4 PT	27	Floor joist	on edge
2	2x4 PT	26 1/2	Leg
2	roof	36 1/4	Roof panel	cut to length, lap one rib

Cut list: sheet goods

Part	Stock	Size
Floor mesh	cloth	34 1/2 x 27
Right side	1/2 ply	30 x 20
Back	1/2 ply	36 x 17
Door mesh	cloth	32 x 0
Roof deck 1	1/2 ply	38 x 36 1/8

Lumber cutting diagram Lengths chosen for the lowest cost; 1/8 in kerf, 1/2 in end trim

2x2 x 8 ft

Door rail 1 33Door rail 2 33Door stile 1 14Door stile 2 14

2x2 x 8 ft

Front top rail 36Back top rail 36Front upright 20

2x2 x 8 ft

Back upright 17

2x4 PT x 8 ft

Front rim 36Floor joist 27Leg 1 26 1/2

2x4 PT x 8 ft

Back rim 36Leg 2 26 1/2

roof x 8 ft

Roof panel 1 36 1/8Roof panel 2 36 1/8

Sheet cutting diagrams Dashed = openings to cut out

Sheet 1: 1/2 in plywood, 4 x 8 ft

Shopping list $175.21 checked / $0.00 estimated

Item	Store	Qty	Each	Line	Note
2x2x8 furring strip	Home Depot	3	$2.97	$8.91	see lumber cutting diagram
2x4x8 ground-contact pressure-treated	Home Depot	2	$4.68	$9.36	see lumber cutting diagram
Corrugated galvanized roof panel, 8 ft (Gibraltar 31 ga; check width)	Home Depot	1	$19.98	$19.98	see lumber cutting diagram
15/32 in (1/2 in) sheathing plywood, 4x8 sheet	Lowe's	1	$32.26	$32.26	see sheet cutting diagrams
Hardware cloth 1/2 in, 3 ft x 25 ft, 19-ga	Home Depot	1	$38.88	$38.88	uses about 27 in of the roll
Galvanized 6 in strap hinge, each (5-pack $32.99)	Home Depot	1	$6.60	$6.60	door
Galvanized staple safety hasp, 3-1/2 in	Home Depot	1	$6.78	$6.78	door
Exterior wood screws #9 x 2.5 in, 5 lb box	Home Depot	1	$29.97	$29.97
Roofing screws #10 x 1-1/2 in with neoprene washer, 200 ct	Home Depot	1	$17.98	$17.98
Poultry staples 3/4 in, 1 lb	Southern States	1	$4.49	$4.49
Total before tax				$175.21

Filled dot: price read from a store listing on Oct 20, 2026. Hollow dot: estimate. Prices come from the master price list, so they change when it changes.

Build steps

Take off the right-hand side's metal panels, roof deck and the right side of the hutch, keeping the side to reuse as a divider.
Screw the new floor rims to the old floor frame's end joist, on edge, and the new leg pair to the outside of the new rims.
Staple the new cloth floor, and screw the uprights, rails, back and a new right side. The old right side is now the divider.
Build the new door, and hang it on strap hinges with a hasp.
Add the new roof deck and the 2 metal panel, lapping one rib onto the old roof.

Before you start

An extension bay adds one 36 x 30 in compartment and 7.5 sq ft to any hutch size. It is the same module as the main hutch.
If the old roof is a different slope, scribe the new deck to it, and flash the joint.
Keep the weight in mind: a four-compartment hutch is a long span; add a leg at every divider.
Draft drawings generated from the model. Build one before selling this plan.