MA General Contractor common mistakes
MA General Contractor · Understand the traps and how to avoid them.
Answering code questions from generic model-code memory and ignoring Massachusetts amendments, local amendments, and the specific code edition adopted in Massachusetts.
Candidates study national IRC-style material and default to familiar model-code sections, then miss state-specific provisions for snow loads, egress, energy, and permit requirements.
What to do instead
Build a chapter-by-chapter Massachusetts amendment crosswalk and, for every practice scenario, identify the governing Massachusetts section before selecting an answer.
Starting demolition, framing, or covering work before the permit is issued or before required inspection sign-offs, relying on a verbal OK from an inspector or owner.
Schedule pressure and unclear knowledge of which inspections are hold points cause candidates to treat inspections as administrative rather than sequential approvals.
What to do instead
Create a permit-and-inspection matrix at project start, post it on site, and require a signed inspection card or written approval before any work proceeds past a hold point.
Treating a short proposal as the complete contract and omitting scope details, change-order procedure, payment schedule, cancellation rights, and dispute resolution.
Candidates copy generic templates or rely on verbal agreements and do not connect contract-law questions to the required written terms for home improvement and construction contracts.
What to do instead
Use a Massachusetts-compliant contract checklist covering scope, price, payment, changes, cancellation, warranties, and dispute process; review every contract against the checklist before signing.
Missing lien-related notices and deadlines because no lien calendar is created when the project starts.
Lien rights are deadline-driven and separate from ordinary payment follow-up, so candidates focus on invoices and forget statutory notice and recording steps.
What to do instead
At contract signing, create a lien calendar with notice, recording, and enforcement dates; assign one person to verify each date against the statute and document completion.
Taking off quantities or planning work from the architectural sheets alone while ignoring structural, mechanical, plumbing, electrical, and site sheets.
Candidates read plans sheet by sheet instead of cross-referencing disciplines, so they miss beams, openings, elevations, equipment clearances, and grid discrepancies.
What to do instead
Use a discipline cross-check: compare architectural and structural grids, floor elevations, sections, schedules, and site plans; mark and resolve discrepancies before estimating or layout.
Estimating from square-foot unit costs without separate allowances for permit fees, inspection corrections, winter conditions, disposal, temporary utilities, and contingency.
Candidates rely on quick unit-cost shortcuts and underestimate Massachusetts labor, code, and site-condition variables.
What to do instead
Use a standardized estimate template with separate line items for permits, inspections, disposal, temporary protection, weather, and a defined contingency; review the bid against the scope and schedule.
Excavating before confirming utility locates and without a written soil, water, and spoil-management plan.
Crews assume someone else called for locates or that the site is clear, and candidates underestimate how much site-work questions depend on pre-dig verification and erosion controls.
What to do instead
Require a pre-dig checklist: locate ticket, utility markout verification, erosion and sediment controls, spoil placement, dewatering plan, and documented approval before excavation.
Placing footing concrete before the footing inspection and without verifying bearing soil, footing dimensions, reinforcement, and frost-depth requirements.
Concrete schedules create pressure to pour, and candidates treat the footing inspection as a formality rather than a required hold point.
What to do instead
Use a signed pour-hold checklist: inspector approval, soil verification, form dimensions, reinforcement, anchor bolts, and frost depth confirmed before any concrete is placed.
Cutting notches and holes in joists, studs, or rafters without checking allowable locations and without requiring approval for lumber species or grade substitutions.
Field fixes and material shortages lead to improvisation, and candidates memorize general framing rules without applying span, loading, and substitution limits.
What to do instead
Keep span, notching, and boring tables on site; require written approval from the designer or GC for any member substitution, notch outside the table, or hole larger than allowed.
Installing insulation and air sealing without a sequencing plan for the energy inspection and without verifying air-barrier continuity and Massachusetts energy-code requirements.
Insulation is treated as a late single-trade item, so air sealing, insulation alignment, and inspection access are compromised and energy-code questions are answered from general knowledge.
What to do instead
Use an envelope commissioning checklist: air-barrier continuity, insulation alignment, penetration sealing, inspection hold point, and blower-door readiness; walk the envelope before close-in.