Seoul Required Building Parking Spaces Calculator

Check building use before estimating parking in Seoul

This calculator applies ordinary Seoul building parking rules to facility areas and residential unit mixes.
A neighborhood facility and a general office can require different parking counts even when their floor areas are identical.
Before signing a lease for a new tenant, converting a floor or extending a building, compare the recorded building use with the proposed design.
Underestimating parking can lead to redesign and delays; overstating an existing building’s additional obligation can create an unnecessary construction budget.

The calculator provides a whole-building requirement estimate for new buildings within its supported scope.
For changes of use and extensions, it calculates a current-rule reference for the entire proposed building, then compares that reference with existing recognized spaces.
The comparison is a simple shortfall, not a determination of an existing building’s incremental legal obligation.
Use the worksheet with approved drawings when consulting an architect and the district office.
These are Korean rules for Seoul, checked in 2026; the English interface does not change the jurisdiction or replace permit review.

Supported scope and applicability checks

Residential applicability needs its own check.
Housing projects directly governed by the Housing Construction Standards, urban-type housing, senior housing, public-rental or station-area exceptions and multiple residential buildings can follow different rules.
An informal description such as an officetel or a multi-unit house is insufficient to settle the governing regime.
The residential confirmation box means the ordinary Seoul Annex 2 item 5 method has been confirmed to apply; it does not waive exceptions.

Nonresidential standards in Seoul Annex 2

Enter class 1 neighborhood, class 2 neighborhood and lodging uses separately even though each has the same 134 m² divisor.
Combining different uses before retaining one decimal can change the mixed-use result.
Nonresidential facility area includes allocated common floor area and excludes internal floor area used for parking.
A lease’s exclusive floor area alone can omit corridors, stairs and other common portions.
For a mixed-use building, retain the allocation schedule showing how common areas were attributed to each use.
Do not add the same common area to every use.

A business sign or tenant’s description does not replace the classification in the building register.
A small office can be classified differently from a general office facility.
Some first-class neighborhood facilities are expressly excluded, and special provisions in other legislation may apply.
If an unsupported use forms part of the building, do not present the supported subtotal as a complete building requirement.

Mixed uses and nonresidential rounding

A single neighborhood facility of 133.99 m² is below the 134 m² threshold and returns zero under the whole-building below-one exception.
At 134 m² the result is 1 space; at 200.99 m² it remains 1; at 201 m² the quotient is exactly 1.5 and the result is 2.
Always rounding up, or rounding every use to an integer before adding, can produce the wrong result.

For a mixed example, a neighborhood facility of 80.4 m² and an office of 60 m² contribute 0.6 spaces each.
The combined 1.2 becomes 1 nonresidential space.
Do not split the same neighborhood use across floors and round each floor: aggregate its 201 m² before calculating.
When housing is present, keep its separately rounded count out of the nonresidential rounding calculation.
The result table shows both raw and included demand so these stages can be inspected.

Residential and officetel demand: compare two standards

Three units at 30 m² give area demand of 1.2 and a unit minimum of 1.5, resulting in 2 spaces.
At 30.01 m² each, the same three units have a minimum of 2.4 and require 3 spaces.
Five units at 60 m² give 4 spaces under both methods; at 60.01 m², their unit minimum becomes 5.
Use precise approved exclusive areas when a unit is near a threshold.

The boundary between 85 m² and 85.01 m² changes the area divisor from 75 to 65.
Looking only at per-unit minimums can understate parking demand for larger units.
The 0.7 minimum for smaller units in directly applicable housing-project rules must not be substituted for the ordinary Seoul ordinance’s 0.8.
Urban-type housing and other special regimes require a separate review of the applicable legislation and local strengthening provisions.

From input to a consultation worksheet

1. Collect consistent records.
   Prepare the building register, approved drawings, proposed floor plan, common-area allocation schedule and recognized parking count.
   
2. Select the project type and confirm the area rules.
   Choose a new building, change of use or extension, then confirm that parking caps or special relief do not apply.
   
3. Enter the entire proposed building.
   Use common-area-inclusive figures for nonresidential uses and exclusive areas for residential units.
   Do not enter only the changed room or additional floor.
   
4. Review intermediate calculations.
   Check area, divisor and included demand, both residential standards and the final rounding of each component.
   
5. Download TXT or print for consultation.
   The worksheet includes the checked date, inputs, formulas and unresolved conditions.
   Editing inputs hides the previous result; calculate again before saving an updated worksheet.
   

The initial plan is empty; the worked-example button loads synthetic inputs.
Its general-area assumption is illustrative and is not a finding about your building.
Existing recognized spaces mean approved capacity, not the number of cars currently parked.
Painted but unapproved bays and a mechanical device’s nominal capacity may differ from legally recognized spaces.
Retain the records supporting the number entered.

Worked example: neighborhood use plus office use

In a mixed residential example, one 30 m² unit under the ordinary Seoul ordinance produces 1 residential space after rounding up.
An office of 60 m² contributes 0.6, rounded to 1 nonresidential space.
The combined requirement is therefore 2 spaces.
Do not add the residential and nonresidential raw demands and apply one ordinary rounding operation to the combined number.

Three practical planning situations

Frequently asked questions