The one-bedroom is the most-built residential layout in the world. Its job is straightforward: separate sleeping from everything else, and do it on as little area as possible without making either zone feel cramped. Almost every design choice in a 1BR is downstream of where you put the bedroom door and how the bathroom relates to both the bedroom and the entry.
How this generator works
Seven templates cover the 1BR space: corridor-h and corridor-v (a single straight hall separating bed/bath from living/kitchen), railroad (rooms strung in a line), side-by-side (bed and living share a wall), open-corner (kitchen tucked into a corner of the living envelope), wrap (L-shaped living wraps around a central bath), and foyer (a small entry room before the public area). Each template generates parametric variation — wall positions jitter within a few percent so two seeds with the same area produce visibly different but valid layouts. The post-processing pipeline runs `fillGaps`, `clampRooms`, and `ensureMasterIsLargest` to guarantee no overflow, no empty corners, and that the bedroom is never larger than the living room.
Design principles for 1BR layouts
Bedroom area sits between 9 and 13 m² in nearly every culture's building code; below 7 m² a room legally is not a bedroom in many jurisdictions. The living room runs 14–25 m² — large enough for a sofa plus a dining nook, small enough not to swallow the budget. The kitchen takes 5–9 m²; below 5 it stops being usable, above 9 it usually wants its own dining island. The bathroom door should never open directly onto the living room if avoidable; the corridor templates exist specifically to put a buffer between them.
When a 1BR works best
Couples, single occupants, urban renters, and starter-homebuyers all gravitate to 1BRs. They are also the right size for serviced apartments, rental investments, and accessory dwelling units larger than a studio. A 1BR stops being efficient when one person works from home full time — there is no second enclosed room to retreat to, and the bedroom becoming an office is a fragile compromise.
Configuration tips
Open kitchen recovers about 3 m² of usable floor versus a separate room because the wall thickness and door swing disappear. At 35–45 m², open is almost always the right call. At 60+ m², separate kitchen becomes plausible again because you can spare the m² and recover acoustic isolation. A balcony at 40 m² takes 5–8 m² off the living room footprint; weigh that against how often you will actually use it.
Frequently asked questions
What area range does the 1-bedroom generator support?+
35 m² at the lower bound (efficient compact layout) up to 70 m² (spacious with separate kitchen and balcony). At 35–45 m², open kitchen is the common choice; at 60+ m², separate kitchen becomes plausible again.
How big is the bedroom in a typical 1BR layout?+
Bedroom area sits between 9 and 13 m² in nearly every 1BR template, with at least one wall above 2.4 m so a standard double bed fits with circulation. The bedroom is never larger than the living room — that ordering is enforced by post-processing.
Should I pick open or separate kitchen for a 1-bedroom apartment?+
Open kitchen recovers around 3 m² of usable floor compared to separate, because wall thickness and door swings disappear. At 35–50 m² total, open is almost always the right choice. At 60+ m² you can spare the m² for a separate kitchen and recover acoustic isolation.
Does a balcony reduce the indoor area?+
Yes — the balcony eats 5–8 m² off the living-room footprint at typical depths. The trade is between indoor lounge space and outdoor relief; weigh how often you would actually use the balcony.
Room standards reference
Typical room sizes used by the generators on this site, drawn from common residential building practice.
| Room | Min area | Typical | Min width |
|---|---|---|---|
| Bedroom (master) | 9 m² | 12–18 m² | 2.4 m |
| Bedroom (secondary) | 7 m² | 8–13 m² | 2.1 m |
| Bathroom (full) | 3 m² | 4–7 m² | 1.5 m |
| Living room | 12 m² | 16–32 m² | 3.0 m |
| Kitchen | 5 m² | 6–11 m² | 1.8 m |
| Hallway / Corridor | — | — | 0.9 m |
These are reference figures used by the floor plan generators on this site. They reflect common ranges from residential building practice; specific jurisdictions (ANSI Z765 in the US, Approved Document M in the UK, NCC Volume 2 in Australia, and equivalent codes elsewhere) impose their own minimums and accessibility requirements. Generated plans are intended for inspiration and visualisation only; do not use them in lieu of plans drawn and stamped by a licensed architect or engineer.