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Four solid plywood-and-trim walls build a real playhouse below and a twin mattress on top — with windows, a working door opening, and a ladder wall reinforced for years of little hands.
| Part | Qty | T × W × L | Material | ✓ |
|---|---|---|---|---|
| Rails The vertical lattice pieces spanning the front and back rail frames. | 53 | 3/4" × 1 1/2" × 11 1/2" | 1x2 | ☐ |
| Rail frame tops and bottoms Two per rail frame — front and back. | 4 | 3/4" × 3 1/2" × 80" | 1x4 | ☐ |
| Rail frame ends Front and back rail frames. | 4 | 3/4" × 2 1/2" × 11 1/2" | 1x3 | ☐ |
| Front plywood Window and door openings cut with a jigsaw before trim goes on. | 1 | 3/4" × 48" × 80" | 3/4" plywood or MDF, 4x8 sheet, sanded | ☐ |
| Legs | 8 | 3/4" × 2 1/2" × 68 1/2" | 1x3 | ☐ |
| Top front trim Overlaps the rail-to-plywood joint by 1". | 1 | 3/4" × 2 1/2" × 75" | 1x3 | ☐ |
| Door trim, sides | 2 | 3/4" × 2 1/2" × 36" | 1x3 | ☐ |
| Door trim, top | 1 | 3/4" × 2 1/2" × 31" | 1x3 | ☐ |
| Front trim, long | 1 | 3/4" × 2 1/2" × 38" | 1x3 | ☐ |
| Front trim, short | 1 | 3/4" × 2 1/2" × 6" | 1x3 | ☐ |
| Front window trim, sides | 6 | 3/4" × 2 1/2" × 21" | 1x3 | ☐ |
| Front window trim, top/bottom | 2 | 3/4" × 2 1/2" × 26" | 1x3 | ☐ |
| Top leg filler pieces Closes the small gap left at the top of each leg. | 4 | 3/4" × 2 1/2" × 2" | 1x3 | ☐ |
| Back leg filler pieces | 2 | 3/4" × 2 1/2" × 45 1/2" | 1x3 | ☐ |
| Back base trim | 1 | 3/4" × 2 1/2" × 80" | 1x3 | ☐ |
| Side rail frame tops and bottoms The end wall without the ladder. | 2 | 3/4" × 3 1/2" × 37 1/2" | 1x4 | ☐ |
| Side plywood One for the non-ladder end, one for the ladder end. Cut the ladder end's window opening before trimming. | 2 | 3/4" × 48" × 37 1/2" | 3/4" plywood or MDF, 4x8 sheet, sanded | ☐ |
| Side end trim | 4 | 3/4" × 2 1/2" × 37 1/2" | 1x3 | ☐ |
| Side window trim Non-ladder end. | 2 | 3/4" × 2 1/2" × 25 1/2" | 1x3 | ☐ |
| Ladder-end rail top and bottom | 2 | 3/4" × 3 1/2" × 21 3/4" | 1x4 | ☐ |
| Ladder rail inside support Backs the full length of the ladder-end top rail from the inside — this is what keeps the rail from working loose under years of climbing. | 1 | 3/4" × 1 1/2" × 66 1/2" | 1x2 | ☐ |
| Ladder spacer | 2 | 3/4" × 1 1/2" × 43" | 1x2 | ☐ |
| Ladder sides | 2 | 1 1/2" × 1 1/2" × 48" | 2x2 | ☐ |
| Ladder rungs Space about 7" apart, less room at the top. | 5 | 3/4" × 1 1/2" × 15 3/4" | 1x2 | ☐ |
| Ladder-end window trim | 2 | 3/4" × 2 1/2" × 13 1/2" | 1x3 | ☐ |
| Mattress support cleats | 2 | 1 1/2" × 1 1/2" × 75" | 2x2 | ☐ |
| Mattress slats Count and spacing per your mattress manufacturer's recommendation. | 10 | 3/4" × 2 1/2" × 39" | 1x3 | ☐ |
| Item | Qty | ✓ |
|---|---|---|
| 3/4" plywood or MDF, 4x8 sheet, sanded The front, back, and two end wall panels. | 2 each | ☐ |
| 1x2, 8 ft Rail lattice, ladder support, ladder spacers and rungs. | 7 each | ☐ |
| 1x3, 8 ft Legs and all trim. Does not include the mattress slats. | 15 each | ☐ |
| 1x4, 8 ft Rail lattice tops and bottoms. | 6 each | ☐ |
| 2x2, 8 ft Ladder sides and mattress-slat cleats. | 3 each | ☐ |
| Pocket hole screws, 1-1/4" | 150 each | ☐ |
| Self-tapping wood screws, 2" Ladder assembly and final wall-to-wall assembly. | 60 each | ☐ |
| Brad nails, 1-1/4" Trim. | 100 each | ☐ |
| Brad nails, 2" | 40 each | ☐ |
| Wood glue | 8 oz | ☐ |
| Wood filler | 6 oz | ☐ |
| 1x3, for mattress slats Cut to 39" — adjust count and spacing to your mattress manufacturer's recommendation. | 10 each | ☐ |
| Finishing supplies (primer and paint) | 1 set | ☐ |
Overall cost: $$$. Lumber varies by region, species, and season, so we give a band rather than a figure.