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Zoning

Detached Building Scheme

Building layout where each structure is built with setbacks on all sides, separated from neighbouring structures. Common in villa and detached housing settlements.

Detached building scheme (Turkish: *Ayrık Nizam*) is a layout where a building is constructed with setbacks on all sides, separated from neighbouring structures by open space. Defined in the Planned Areas Zoning Regulation, it is one of three Turkish building schemes: (1) Detached (ayrık), (2) Attached (bitişik) — shared walls with neighbours, zero side setback, (3) Semi-detached (ikiz) — attached to one neighbour, detached from others.

Setbacks: In a detached scheme, each plot reserves (1) front garden (street side), (2) side gardens (toward neighbours), (3) rear garden. Minimum setbacks come from Planned Areas Zoning Regulation arts. 25-27 and local zoning plans. Typical values: front 5 m, side 3 m (+ half the building height possible), rear 3 m. Taller buildings (8+ storeys) require larger setbacks.

Density character: Detached schemes typically mark low-density settlement — villas, detached homes, 2-4-storey independent buildings. KAKS (floor area ratio) and TAKS tend to be low (KAKS 0.40-1.50, TAKS 0.20-0.30). Suburban and green-area-heavy neighbourhoods are usually detached.

Advantages: (1) Ventilation and light — each building has independent facades; (2) Fire safety — inter-plot distance slows fire spread; (3) Landscape and green area — individual gardens; (4) Seismic safety — independent structural response separate from neighbours.

Disadvantages: (1) Lower yield — less buildable area per plot; (2) Infrastructure cost — longer utility runs due to spread-out layout; (3) Land cost — fewer units per plot due to setbacks.

Changing the scheme: Zoning plan amendments can convert detached to attached or vice versa. Usually tied to a density increase or decrease. Existing permitted buildings retain their status; new buildings must follow the new scheme.

Examples

  • 1.Sarıyer, İstanbul: detached, KAKS 0.80, 2 storeys, TAKS 0.25 → on a 1,000 m² plot, ground floor 250 m², total villa area 800 m² over two storeys.
  • 2.Çankaya, Ankara, old villa neighbourhood: detached, front garden 5 m, side gardens 4 m, rear 3 m → on a 20×30 m (600 m²) plot, buildable footprint ~11×22 m = 242 m².
  • 3.Karşıyaka, İzmir seaside: detached to attached conversion → KAKS from 1.20 to 2.50, villa area transformed into a 4-6-storey apartment character over a 10-year transition.

Frequently Asked Questions

What's the difference between detached, attached and semi-detached schemes?expand_more
**Detached**: building has setbacks on all sides, separate from neighbours (villa, low density). **Attached**: zero side setback, shared masonry with neighbour — no side windows, producing continuous street-front buildings (city centres, apartments). **Semi-detached**: attached on one side, detached on others — paired villas. The zoning plan determines which applies.
Is it easier to get a permit in a detached scheme than in attached?expand_more
Procedurally no difference; both follow the standard permit process (Law 3194 arts. 21-22). In detached, though, with larger setbacks the approval may be simpler — less chance of collision with neighbouring structures. In attached, neighbour-wall and facade harmony is additionally checked.
How are setbacks determined?expand_more
Planned Areas Zoning Regulation arts. 25-27 set the baselines: front min. 5 m (sometimes 3 m), side min. 3 m + H/2 (half the building height), rear min. 3 m. Local plans can exceed these minima (e.g. front 7 m). The minima cannot be undercut. Exceptions: corner plots, plots without street frontage.
Can I convert my detached home to attached construction?expand_more
Generally no — if the plan is detached, you cannot build attached to the neighbour. A plan amendment is required, which requires municipal/metropolitan council approval and posting, taking months. Amendments for a single plot are usually rejected (plan-integrity principle) unless the whole neighbourhood is changed. Existing permitted buildings keep their status; only new construction follows the new scheme.

Related Terms

Setback DistanceZoning PlanFAR (Floor Area Ratio / KAKS / Emsal)GCR (Ground Coverage Ratio / TAKS)

Sources

  • • Planned Areas Zoning Regulation art. 4 (definitions) and arts. 25-27 (setbacks)
  • • Zoning Law 3194 arts. 21-22 (permit)
  • • Spatial Plans Production Regulation (plan hierarchy)

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Last updated: 2026-04-24