OBC House Exam study guide
OBC House Exam · Work through your exam, one topic at a time.
The OBC House Exam is a professional assessment built around the Ontario Building Code as it applies to residential construction - chiefly detached, semi-detached and small multi-unit houses. It is aimed at candidates who need to demonstrate code literacy for house-level work: building officials and inspectors, designers and drafters preparing permit drawings, renovation contractors, and construction managers who coordinate residential projects. The OBC House Exam study guide has 9 sections and about 2,426 words.
01Building Codes and Regulatory Compliance
A candidate must know the hierarchy: model codes (adopted by reference), local amendments, and the permit/inspection process that enforces them. Understand the difference between a code requirement (mandatory minimum) and a standard (referenced test or design method).
305 words, about 2 min02Structural Systems and Foundations
Understand load paths: gravity (dead, live), lateral (wind, seismic), and how they travel from roof to foundation. Know the difference between bearing-wall and frame structures, and between shallow foundations (spread footings, slabs-on-grade, mats) and deep foundations (piles, drilled piers).
294 words, about 1 min03Building Envelope and Weatherproofing
A strong candidate can describe the envelope as four functions: water control, air control, vapor control, and thermal control. Understand that water is managed by shedding, drainage, and drying, and that the drainage plane must lap shingle-style (upper over lower).
287 words, about 1 min04Mechanical, Electrical, and Plumbing Systems
Know basic HVAC types (forced air, hydronic, split systems, VRF), the refrigeration cycle, and the role of ventilation and exhaust. Understand electrical fundamentals: service, panel, branch circuits, grounding, and GFCI/AFCI protection.
262 words, about 1 min05Fire and Life Safety
Understand the means of egress components: exit access, exit, and exit discharge. Know occupant load calculations, egress width, travel distance, common path, and dead-end limits.
267 words, about 1 min06Energy Efficiency and Sustainability
Understand the building thermal envelope: insulation R-values, window U-factors and SHGC, air sealing, and thermal bridging. Know the difference between prescriptive and performance compliance paths, and the role of commissioning.
248 words, about 1 min07Accessibility and Occupancy Requirements
Understand accessible routes, clear floor space, turning space, and reach ranges. Know that accessibility applies to the site arrival point through the building to the intended use.
269 words, about 1 min08Construction Materials and Methods
Know common structural and finish materials: concrete (mixing, curing, reinforcement), masonry (mortar, flashing, weep holes), wood (grading, moisture content, fasteners), steel, and gypsum assemblies. Understand concrete curing, control joints, and the role of reinforcement.
247 words, about 1 min09Inspection, Testing, and Plan Review
Understand the sequence: plan review, permit issuance, inspections at defined stages, testing, and final approval. Know typical inspection stages: footing/foundation, framing, rough-in (MEP), insulation, and final.
247 words, about 1 min