What is Site Analysis and Planning?

Site analysis is the systematic study of a site's physical, environmental, and regulatory conditions before design begins. It shapes building orientation, massing, circulation, and code compliance from the very first sketch.

Short answer

Site analysis and planning is the process of studying a site's topography, climate, zoning, and access to guide design decisions, often measured through metrics like the Floor Area Ratio (FAR) that control allowable building density.

The Site Analysis Process

1
Site Survey & Topography
Map grades, boundaries, and existing structures.
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2
Climate & Sun Path Analysis
Study solar angles, wind, and microclimate.
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3
Zoning & Regulatory Review
Check setbacks, height limits, and maximum FAR.
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4
Circulation & Access Study
Assess vehicle, pedestrian, and transit access.
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5
Context & Neighborhood Analysis
Review adjacent buildings, views, and urban fabric.
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6
Synthesis & Site Plan
Combine findings into the initial site layout.

Try it: interactive calculator

Floor Area Ratio (FAR)

= 3,000/1,000

Total floor area3,000 m²Site area1,000 m²

Step-by-step worked examples

A site is 2,000 m² and the proposed building has 3,000 m² of total floor area across all levels. Find the FAR.

FAR = Total floor area / Site area
= 3000 / 2000 = 1.5

Zoning allows a maximum FAR of 2.0 on a 5,000 m² lot. What is the maximum floor area allowed?

Total floor area = FAR × Site area
= 2.0 × 5000 = 10,000 m²

A 4-story building covers 800 m² per floor on a 1,600 m² site. What is the FAR?

Total floor area = 800 × 4 = 3,200 m²
FAR = 3200 / 1600 = 2.0

Flashcards

Quick quiz

Q1.A site is 1,000 m² with 2,500 m² total floor area. FAR?

Correct answer: B. FAR = 2500/1000 = 2.5.

Q2.Which is NOT typically part of site analysis?

Correct answer: C. Furniture selection is interior design, not site analysis.

Q3.A higher FAR generally allows...

Correct answer: B. FAR directly caps how much floor area (density) can be built on a site.

Q4.Site analysis is best performed...

Correct answer: B. It must inform decisions from the earliest design stage.

📄Download this topic as a printable worksheet (PDF)Summary + 10 questions + answer key — print it, share it in class.↓

Common mistakes

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Skipping site analysis and jumping straight to design. — Correct: Always complete site analysis first — it shapes orientation, massing, and code compliance.

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Confusing FAR with lot coverage. — Correct: FAR counts total floor area across all stories; lot coverage is just the building's ground footprint.

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Ignoring seasonal sun angles. — Correct: Study sun path across seasons, not just a single day, for accurate solar design.

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Overlooking local zoning FAR limits. — Correct: Always verify the maximum allowable FAR with local zoning before massing the design.

FAQ

What is site analysis in architecture?

It's the study of a site's context — topography, climate, zoning, and circulation — used to guide planning and design decisions.

What is the formula for Floor Area Ratio (FAR)?

FAR = Total floor area ÷ Site area. It measures allowable building density on a lot.

What are examples of site analysis factors?

Topography, sun path, wind, zoning setbacks, existing vegetation, and traffic circulation.

How do you calculate FAR for a building?

Divide the sum of all floor areas in the building by the total site area.