Kiran.Building

96″ wide window seat plans

Built-in bench for a window or alcove, with drawers or cubbies. 96″ × 18″ × 18 11/16″, about $482 in 3/4″ birch plywood, 1/4″ plywood, 1×2 pine board, 1/2″ birch plywood. Change any size below.

96″ × 18″ × 18 11/16″W × H × D
~$482materials (estimate)
38parts
8steps
WidthHeight

Drag an orange dot to resize; a dashed line shows when it snaps to a common size. Click a dot, then use the arrow keys to nudge 1/8″ (hold Shift for 1″). Every size can also be typed in the panel.

Checks

  • The seat passes the sag check.
  • Screw the case to the wall studs through the back so it does not slide.

Shopping list

QtyItemEst.
11×2 pine board, 8′ (board)Home DepotLowe's$5.60
33/4″ birch plywood, 4×8 sheet (sheet)Home DepotLowe's$204.00
11/4″ plywood, 4×8 sheet (sheet)Home DepotLowe's$28.00
21/2″ birch plywood, 4×8 sheet (sheet)Home DepotLowe's$104.00
11 5/8″ wood screws (box of 100)Home DepotLowe's$9.00
1Wood glue (bottle)Home DepotLowe's$5.00
11″ brad nails (box of 1000)Home DepotLowe's$6.00
1Felt floor pads (pack)Home DepotLowe's$5.00
23/4″ iron-on birch edge banding (25 ft roll)Home DepotLowe's$18.00
6Cabinet pull (each)Home DepotLowe's$24.00
416″ full-extension ball-bearing drawer slides, 100 lb (pair)Home DepotLowe's$52.00
15/8″ pan-head screws (slides, hinges) (box of 100)Home DepotLowe's$6.00
11″ wood screws (fronts) (box of 100)Home DepotLowe's$7.00
1#10 × 2 1/2″ screws for brackets into studs (box of 50)Home DepotLowe's$8.00

About $482 · rough estimates, check the store

Parts

PartQtyLengthWidthMaterial
ASide
Edge-band the front edge.
218″18″3/4″ birch plywood
BTop and bottom294 5/8″17 3/4″3/4″ birch plywood
CKick board194 5/8″3″3/4″ birch plywood
DBack215″48″1/4″ plywood
ETop stiffener
Glue and screw under the top, flush with the front.
423 1/8″1 1/2″1×2 pine board
FDivider313 5/8″17 3/4″3/4″ birch plywood
GDrawer front
Edge-band all four edges.
224 1/16″14 7/8″3/4″ birch plywood
HDrawer side816″12″1/2″ birch plywood
IDrawer front and back821 3/16″12″1/2″ birch plywood
JDrawer bottom416″22 1/8″1/4″ plywood
KDrawer front
Edge-band all four edges.
223 11/16″14 7/8″3/4″ birch plywood

Cut list

3/4″ birch plywood, sheet 1 of 3

A 18″×18″A 18″×18″B 94 5/8″×17 3/4″

3/4″ birch plywood, sheet 2 of 3

B 94 5/8″×17 3/4″G 24 1/16″×14 7/8″G 24 1/16″×14 7/8″K 23 11/16″×14 7/8″K 23 11/16″×14 7/8″F 17 3/4″×13 5/8″F 17 3/4″×13 5/8″F 17 3/4″×13 5/8″

3/4″ birch plywood, sheet 3 of 3

C 94 5/8″×3″

1/4″ plywood, sheet 1 of 1

J 22 1/8″×16″J 22 1/8″×16″J 22 1/8″×16″J 22 1/8″×16″D 48″×15″D 48″×15″

1/2″ birch plywood, sheet 1 of 2

I 21 3/16″×12″I 21 3/16″×12″I 21 3/16″×12″I 21 3/16″×12″I 21 3/16″×12″I 21 3/16″×12″I 21 3/16″×12″I 21 3/16″×12″H 16″×12″H 16″×12″H 16″×12″H 16″×12″H 16″×12″

1/2″ birch plywood, sheet 2 of 2

H 16″×12″H 16″×12″H 16″×12″

1×2 pine board, 96″ → E 23 1/8″ · E 23 1/8″ · E 23 1/8″ · E 23 1/8″

EEEE

Kerf 1/8″ included. Every cut runs edge to edge.

Have the store cut it

Most home centers rip sheets on their panel saw. Show them this; do the short crosscuts at home.

  1. 3/4″ birch plywood: rip into strips 18″, 17 3/4″, keep the rest.
  2. 3/4″ birch plywood: rip into strips 17 3/4″, 14 7/8″, 13 5/8″, keep the rest.
  3. 3/4″ birch plywood: rip into strips 3″, keep the rest.
  4. 1/4″ plywood: rip into strips 16″, 15″, 15″, keep the rest.
  5. 1/2″ birch plywood: rip into strips 12″, 12″, 12″, keep the rest.
  6. 1/2″ birch plywood: rip into strips 12″, keep the rest.

Steps

  • Tape measure
  • Speed square
  • Pencil
  • Drill/driver
  • Clamps
  • Safety glasses
  • Hearing protection
  • Dust mask
  • Circular saw and a straight edge (or have the store cut the sheets)
  • Hammer
  • Sander, 120 and 180 grit

Underlined words have a short explanation: hover or tap them. All of them are on the glossary page.

  1. 1Before you start

    Read every step once, start to finish, before you buy or cut anything. Each step names the parts it uses by letter; the parts list gives their sizes.

    Set up somewhere flat with good light. A pair of sawhorses with a sheet of plywood on top makes a fine work table.

    Wear safety glasses whenever a tool is running, hearing protection for saws, and a dust mask for sanding and for cutting treated wood or sheet goods. Tie back long hair and loose sleeves. Keep children and pets out of the work area.

    • Tip At the store, pick straight boards: hold each one up to your eye and look down its length. Skip boards that bow, twist or have big knots near the ends.
    • Tip Measure twice, cut once. Most mistakes are a misread tape, not a bad cut.
  2. 2Cut and label the parts

    Cut every part on the cut list. Cut the longest parts first: if one goes wrong, it can still become a shorter part.

    To mark a cut, hook your tape on the end of the board, make a small V with its point exactly at the measurement, and draw a square line through the point with a speed square. Put an X on the waste side.

    Cut on the waste side of the line, so the blade's kerf (about 1/8″) comes out of the scrap, not your part. Cut sheets with the good face down when using a circular saw: the blade splinters the top face.

    Write each part's letter in pencil on a face that won't show, and stack the parts by letter.

    Sand the faces before assembly while they're flat and easy to reach: 120 grit, then 180.

    ✓ Lay the parts out and count them against the parts list. Measure a few: if one is off by more than 1/16″, recut it now.

    STOP. Let the saw reach full speed before it touches the wood, keep both hands clear of the blade's path, and never reach under a board you're cutting. Support long boards on both sides of the cut so the blade doesn't pinch.
  3. 3Edge-band

    Iron edge banding onto every front edge that shows, and all four edges of each door and drawer front. Trim and sand.

    AGK
  4. 4Mark the slide lines

    Draw a slide line at 5 7/16″ (bay 1), 5 7/16″ (bay 2), 5 7/16″ (bay 3), 5 7/16″ (bay 4) from the floor end, on both faces of each drawer bay.

    AF
  5. 5Build the case

    Glue and screw the bottom between the sides with its underside at 3″, and the top flush with the top ends. 1 5/8″ screws, 3 per joint.

    Glue and screw a stiffener under the front of the top in each bay, flush with the front edge.

    Fit the dividers between top and bottom at 23 13/16″, 47 5/8″, 71 1/2″ from the left side, outside faces.

    Screw the kick board under the bottom, 1/2″ back from the front.

    Square the case and nail on the back.

    ✓ Diagonals match within 1/16″.

    ADCBEF
  6. 6Build and hang the drawers

    Glue and brad each box: fronts and backs between the sides, bottom nailed underneath. Screw the slides on (case half on the line, drawer half flush with the box front) and click the boxes in.

    ✓ Each box runs smoothly with no rubbing.

    JHI
  7. 7Attach the drawer fronts

    Start at the bottom. Tape each front on with 1/8″ spacers between and 1/16″ at the edges, then drive four 1″ screws from inside the box.

    ✓ Gaps are an even 1/8″.

    GK
  8. 8Finish

    Ease every sharp edge and corner with 120-grit sandpaper so nobody gets a splinter.

    Sand all over with 180 grit, always along the grain (the direction the wood fibres run). Scratches across the grain show through stain.

    Wipe off the dust with a barely damp rag and let it dry.

    Paint, stain or a clear coat (water-based polyurethane is the easiest). Apply thin coats with the grain, let each dry fully, and sand lightly with 220 grit between coats.

    Let it dry for the time on the can before using it.

    • Tip Try your finish on a scrap of the same wood first: stain looks different on every board.

Conceptual layout, material estimate and assembly guide from the sizes you entered. Not engineering, not a building plan, not stamped or approved. Confirm measurements on site; follow local codes and product instructions; anchor tall pieces before use. Using this plan means you accept the Terms of Use.

Questions

How much does it cost to build a 96″ wide window seat?

About $482 in materials at typical US home-center prices, from the 14-line shopping list. Prices vary by store and region.

What size is it?

96″ wide, 18″ high and 18 11/16″ deep. Every size can be changed and the plan updates.

What lumber do I need?

1 × 1×2 pine board, 8′; 3 × 3/4″ birch plywood, 4×8 sheet; 1 × 1/4″ plywood, 4×8 sheet; 2 × 1/2″ birch plywood, 4×8 sheet. The cut list shows which part comes from which board, with the saw kerf included.

What tools do I need?

Tape measure, Speed square, Pencil, Drill/driver, Clamps, Safety glasses, Hearing protection, Dust mask, Circular saw and a straight edge (or have the store cut the sheets), Hammer, Sander, 120 and 180 grit.

How many parts and steps are there?

38 parts in 11 kinds (3/4″ birch plywood, 1/4″ plywood, 1×2 pine board, 1/2″ birch plywood), assembled in 8 steps.