What Is Site Analysis in Architecture?
Site analysis is the systematic study of a building site's physical, environmental, and regulatory conditions before design begins. It informs site planning decisions — where to place a building, how to orient it, and how to route access — so the design responds intelligently to its context.
Site analysis is the process of studying a site's topography, climate, sun path, views, access, soil, vegetation, and zoning constraints before designing; site planning then uses those findings to position buildings, roads, and open space on the land.
- 1↓Site inventorySurvey topography, soil, existing structures, and vegetation.
- 2↓Climate & sun studyMap sun path, prevailing winds, and microclimate.
- 3↓Context & accessStudy surrounding buildings, views, roads, and pedestrian routes.
- 4↓Zoning & regulationsCheck zoning code, setbacks, height limits, and FAR.
- 5Synthesis & site planCombine findings into a site plan — building placement, orientation, and circulation.
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Step-by-step worked examples
A developer owns a 1,000 m² lot in a zone with a maximum FAR of 3.0. What is the maximum total floor area allowed?
FAR = A_floor / A_site A_floor(max) = FAR × A_site = 3.0 × 1,000 = 3,000 m²
A site analysis shows the site slopes 6 m over a 120 m run from north to south. What is the average slope as a percentage?
Slope % = (rise / run) × 100 Slope % = (6 / 120) × 100 = 5%
A rectangular building footprint of 25 m × 40 m sits on a 2,500 m² site. What is the site coverage ratio?
Building footprint = 25 × 40 = 1,000 m² Coverage ratio = footprint / site area = 1,000 / 2,500 = 0.40 = 40%
Flashcards
Quick quiz
Q1.A 2,000 m² site has a maximum allowed FAR of 2.5. What is the maximum total floor area?
Q2.Which of these is typically studied FIRST in site analysis?
Q3.What does 'setback' refer to in site planning?
Q4.A building footprint of 800 m² sits on a 4,000 m² site. What is the site coverage ratio?
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Common mistakes
Site analysis is only about measuring the land's dimensions. — Correct: It also covers climate, sun path, views, access, soil, vegetation, and legal/zoning constraints.
FAR and site coverage mean the same thing. — Correct: FAR counts total floor area across all stories; site coverage only counts the ground-floor building footprint.
Site planning can happen before site analysis is complete. — Correct: Site planning decisions should be based on a completed site analysis — designing first and analyzing later leads to poor-fit buildings.
Slope and topography don't affect building cost. — Correct: Steeper slopes often require more foundation work, retaining walls, and grading — significantly affecting cost.
FAQ
What is site analysis in architecture?
It's the study of a site's physical, environmental, and regulatory conditions — topography, climate, access, zoning — done before designing a building.
What is the formula for Floor Area Ratio (FAR) in site planning?
FAR = total building floor area ÷ site area. A FAR of 2.0 on a 1,000 m² site allows up to 2,000 m² of floor area.
What are examples of site analysis factors?
Examples include topography, sun path, prevailing winds, soil conditions, vegetation, views, vehicular/pedestrian access, and zoning setbacks.
How do you calculate site coverage in site planning?
Divide the building's ground-floor footprint area by the total site area, then multiply by 100 to get a percentage.