Short answer
Seat height 18 inches finished — that is the frame plus the compressed cushion, not the frame alone. Building the frame at 18 and adding a 3-inch cushion gives you a seat at 21 inches, which is too high and cannot be fixed.
Seat depth 18 to 20 inches for dining. Deeper is a lounging depth and pushes people away from the table; it needs back cushions to correct.
Allow 24 inches of table edge per person, same as any dining seat, and 12 inches between the table edge and the front of the seat.
On this page
Where built-in seating wins
- Against a wall where a chair cannot pull out. A chair needs 30 to 36 inches behind it; a banquette needs none. In a tight breakfast area that difference is the whole room.
- In a bay window, which is otherwise dead floor area that furniture never quite fits.
- Where you need more seats than the floor allows. People compress along a bench in a way they cannot on chairs.
- Where storage is short. A bench is a chest that takes no additional floor area.
- To define a zone in an open plan without building a wall.
- Where children eat. A bench with a wipeable cushion is more forgiving than four upholstered chairs.
Where it loses: a banquette cannot be moved, cannot be reconfigured, and the person in the corner has to ask everyone else to stand. For a formal dining room used for long dinners, chairs remain the better answer — see the dining room guide.
What dimensions make built-in seating comfortable?
| Element | Dimension | Note |
|---|---|---|
| Finished seat height | 18″ | Frame plus compressed cushion — build the frame at 14 to 15″ |
| Seat depth, dining | 18 to 20″ | Deeper requires back cushions to bring you forward |
| Seat depth, lounging window seat | 22 to 26″ | With cushions to lean against |
| Width per person | 24″ | Same as any dining seat |
| Back height, dining | 14 to 18″ above the seat | Enough to lean on without blocking a window |
| Back angle | 5 to 10 degrees | A vertical back is uncomfortable within twenty minutes |
| Table edge to seat front | 10 to 12″ | Closer than for chairs, since you slide in |
| Table height | 30″ | Standard, against an 18″ seat |
| Toe recess | 3″ deep, 4″ high | So heels do not scuff the front panel |
The finished seat height is the number that is most often got wrong, and it is worth repeating: 18 inches is the finished height with a person sitting on it. Build the frame at 14 to 15 inches, allow for the cushion, and check with the actual foam before the frame is fixed.
The back angle is the second. A dead-vertical back looks crisp in a drawing and is uncomfortable within half an hour. Five to ten degrees, or a loose back cushion, transforms it.
Built-in seating is unforgiving: seat height, depth and back angle have to be right before anything is fixed, because none of them can be adjusted afterwards.
Jan Revels draws it, has it built, and specifies the cushions and fabric as one package.
Sizing the table to a banquette
- A round or oval table works better than rectangular against a banquette, because the corners are exactly where legs need to be and where people slide in.
- A pedestal base is strongly preferable. Four legs at the corners are precisely what makes sliding along a bench awkward.
- Table overlaps the seat by 10 to 12 inches. Closer than for chairs, because nobody pulls a bench out.
- For an L-shaped banquette, the table should sit into the corner rather than centered in the room, or the far seat is unreachable.
- Count the corner seat as half a seat. Whoever sits there is trapped, and in practice it gets used only when the table is full.
Does storage under a banquette get used?
A bench is a large volume of storage, and most of it goes unused because of how it opens.
| Access | Reality |
|---|---|
| Lift-up seat lid | Requires clearing the cushion and anyone sitting there. Used twice a year |
| Drawers in the base | Used weekly. Much better, and more expensive |
| Doors in the base | Fine, though a knee often blocks them at a dining table |
| Open cubbies at the end | Excellent for baskets, shoes and everyday items |
Choose the access by what will be stored. Seasonal items and table linen can live under a lift-up lid; anything used weekly needs a drawer. If drawers are not affordable, be honest that the space is long-term storage rather than daily storage, and plan the daily storage elsewhere — see closets and storage design.
Two practical notes: gas struts or soft-close hinges on a lift-up lid, because a heavy lid dropping on a child’s hand is a real risk. And ventilate the box if anything soft is stored in it.
Cushions and upholstery
- High-resilience foam, 3 to 4 inches, is the workhorse. Softer feels luxurious for a month and then flattens.
- Wrap the foam in dacron for a softer edge and a better-looking cushion.
- A down-wrapped seat is comfortable and needs plumping. In a breakfast nook used daily, foam is the practical answer.
- Performance fabric, always. This is where food is eaten. Specify for what will be spilled — see choosing upholstery and fabrics.
- Removable covers with zips, and have them made so they can actually be taken off and cleaned.
- Pattern hides everything. A plain pale seat cushion in a family breakfast nook is an optimistic decision.
- Loose back cushions are more comfortable and more flexible than an upholstered back, and they let you correct the seat depth after the fact.
Window seats specifically
- Check what is under the window. A floor register or a radiator beneath a window seat needs a grille in the seat front, or the room will not heat properly.
- Do not block the window operation. A casement that opens inward and a window seat do not coexist.
- Sun will fade the cushion. This is a west-facing-window problem in Texas particularly; choose a fabric rated for light fastness and consider a shade — see the window treatments guide.
- Condensation. A cushion pressed against cold glass in winter can trap moisture. Leave a small gap.
- Height relative to the sill. The seat should sit below the sill, ideally with the sill acting as a back rest or a ledge.
- Depth 22 to 26 inches if it is for reading rather than dining, with cushions to lean into.
Key takeaways
- 18 inches is the FINISHED seat height, cushion compressed. Build the frame at 14 to 15.
- 18 to 20 inches deep for dining; 22 to 26 for a reading window seat.
- Angle the back 5 to 10 degrees, or use loose back cushions.
- 24 inches of table per person, table overlapping the seat by 10 to 12 inches.
- Round or oval table on a pedestal, not four legs at the corners.
- Drawers get used weekly; lift-up lids get used twice a year.
- Performance fabric with a pattern, and covers that genuinely come off.
Frequently asked questions
How high should a banquette seat be?
How deep should a window seat or banquette be?
What table works with a banquette?
Is storage under a banquette worth it?
What should I check before building a window seat?
Jan has practiced interior design in Dallas since 1997 and founded Chateau Concepts in 2001. She holds a BFA in Interior Design from the University of North Texas. She designs and general-contracts residential and commercial projects across the Park Cities, Preston Hollow and North Dallas. Read her full profile →
Written and reviewed by Jan Revels before publicationWork with Chateau Concepts
Jan Revels handles both sides of a project in Dallas and the Park Cities — the design and the build.