Base Cabinet – 21 in. W × 30 in. H – B21
Base Cabinet – 21 in. W × 30 in. H – B21
SKU:B21-PB-MPW
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Prices above update to the exact box material + finish you selected. Changing size keeps that configuration when the next cabinet supports it.
Dimensions & specifications
- Width
- 21 in.
- Height
- 30 in.
- Model / SKU
- B21-PB-MPW
- Configuration
- Particle Board / Flat Pure White
- Product type
- Base Cabinet
Check the product overview for included components, materials and installation requirements. Ask a product question →
Product DetailsOverview & included information
The ShopKitchens B21 is a 21-inch-wide frameless ready-to-assemble (RTA) base kitchen cabinet for perimeter runs, islands and layouts where a narrower storage cabinet helps complete the cabinet run.
Model: B21
Cabinet size: 21 in. W × 30 in. H × 23.875 in. D
Construction: Frameless RTA
Box options: Particle board or plywood, depending on the selected variant
Door and finish options: Select from the currently available combinations shown on this product page.
Planning a 21-inch base cabinet
Confirm the complete wall or island run before selecting cabinet widths. Reserve space first for corners, sink bases, dishwashers, ranges, tall cabinets and other fixed appliances. A 21-inch base cabinet can be useful where a narrower enclosed storage cabinet is needed between larger components.
| Planning item | What to verify for the ShopKitchens B21 |
|---|---|
| Cabinet width | Allow 21 inches for the cabinet, plus any filler or finished panel required by the installation. |
| Cabinet depth | Verify the 23.875-inch cabinet depth with the planned countertop, adjacent cabinets and appliance clearances. |
| Walls and corners | Check wall conditions, corner reservations and door or drawer clearance before ordering. |
| Appliances | Use the appliance manufacturer's current installation dimensions and required clearances; do not size the cabinet run from nominal appliance width alone. |
| Exposed ends | Add the appropriate finished panel where a cabinet side remains visible in the completed kitchen. |
| Construction | Choose particle board or plywood from the available B21 variants and keep the intended box specification consistent across the cabinet order. |
| Door style and finish | Confirm the selected door/finish combination across adjoining cabinets before checkout. |
B21 ordering checklist
Before ordering, verify the measured opening, adjacent cabinet widths, fillers and panels, countertop plan, appliance specifications and the selected construction and finish. Cabinet dimensions are product dimensions; installation conditions can require additional clearance.
When does a B21 make sense?
The B21 is suited to layouts that need a 21-inch-wide enclosed base cabinet without moving to a wider cabinet size. It can help complete a perimeter or island run while maintaining a consistent frameless cabinet system. Final sizing should always follow verified room measurements and the requirements of adjacent components.
SpecificationsSKU & selected configuration
- Product
- Base Cabinet – 21 in. W × 30 in. H – B21
- SKU
- B21-PB-MPW
- Product type
- Base Cabinet
- Box Material
- Particle Board
- Door Style and Finish
- Flat Pure White
Cabinet ConfigurationConstruction & visible finish
The price, selected options and Add to Cart action above refer to the same Shopify variant. Current selection: Particle Board / Flat Pure White.
Confirm the dimensions in the product title and description, then review fillers, finished panels and other fitting pieces against the complete layout.
Delivery & SupportAvailability, timing & product help
Prices are in CAD and HST is extra. Delivery timing varies by product, order size, destination and current availability. Final delivery timing is confirmed during order review.
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