Trade Guides
Trade-specific estimating guidance for electrical, plumbing, concrete, framing, HVAC, roofing, and other trades.
17 articles
What should a contractor track in every project from award to closeout?
At minimum, track scope, budget, commitments, drawings, procurement status, progress, and payment states in one project record. That gives the team a usable control tower instead of a pile of disconnected updates, and a construction ERP like OneMake is built for that kind of end-to-end control.
Read the answerTrade GuidesSteel Estimate and Takeoff: How to Estimate Rebar and Structural Steel Without Missing Bends, Laps and Waste
Start by taking off the job as assemblies, not just pounds: bar size, length, bends, hooks, laps, and placement conditions all need to be captured separately. Then convert those quantities into unit prices for material, fabrication, and labor so waste and complexity are visible instead of hidden.
Read the answerTrade GuidesHow to estimate electrical circuits, outlets, conduit, and panels from plans
Start by breaking the drawings into device counts, circuit groups, conduit runs, wire lengths, and panel/breaker requirements. Then price each part separately so you can see materials, labor, and allowances clearly instead of hiding them in one lump sum. Amperio helps electrical estimators do this faster from plans with trade-specific takeoff and pricing.
Read the answerTrade GuidesHow to estimate small commercial fire sprinkler riser and accessory work
Start with the full scope around the riser, not just the pipe and fittings. Small sprinkler jobs are often won or lost on support, valves, trim, testing, coordination, access, and closeout items that are easy to miss in a quick takeoff. A good estimate breaks the job into system components, installation conditions, and required testing so the final number reflects the real work.
Read the answerTrade GuidesHow to estimate small commercial fire protection work without missing devices and testing
Start by separating the job into devices, pipe and fittings, labor for layout and installation, and the required test and closeout work. The common mistake is pricing only the visible install and forgetting supervision, coordination, testing, inspection prep, and documentation.
Read the answerTrade GuidesHow to estimate small commercial concrete patch and repair work without missing setup and access costs
Start by pricing the work around access, protection, removal, repair, and cleanup instead of just the patch itself. Small concrete repair jobs often lose margin when mobilization, sawcutting, demo, curing, traffic control, and access constraints are left out.
Read the answerTrade GuidesHow to estimate small commercial roofing repairs without missing flashing and accessories
Start by separating the repair into roof area, edge details, penetrations, flashing, fasteners, sealants, access, and disposal instead of pricing only the visible square footage. Small roofing jobs often lose money because the hidden accessory work and access constraints are not counted.
Read the answerTrade GuidesHow do you estimate residential remodeling jobs without missing allowances and demo?
Start by separating base scope, allowances, and demo/protection work instead of lumping them into one number. Remodeling bids go wrong when assumptions are vague, site conditions are underestimated, and small but necessary tasks like protection, disposal, and temporary work are left out.
Read the answerTrade GuidesHow to Estimate Commercial Electrical Work: Small Additions and Service Upgrades
To estimate commercial electrical work, break the job into scope, existing conditions, material, labor, equipment, and closeout costs before you price it. Small electrical jobs go wrong when estimators treat the visible device work as the whole job and forget access, shutdown coordination, permitting, and troubleshooting time.
Read the answerTrade GuidesHow to estimate small commercial HVAC controls and startup work
Start by separating the job into hardware, labor, programming, startup, and commissioning tasks, then price each part by zone or system. The biggest misses usually come from coordination time, troubleshooting, and return visits, not from the thermostat or controller hardware itself.
Read the answerTrade GuidesHow do you estimate roofing jobs without missing flashing and accessory costs?
Break the roofing job into roof cover, underlayment, flashing, penetrations, fasteners, disposal, access, and labor for tear-off and cleanup. Most margin leaks happen when accessories and site conditions are treated as minor extras instead of priced line items.
Read the answerTrade GuidesHow to estimate electrical panel upgrades and service changeouts
Start by separating the work into permit, service equipment, labor, utility coordination, and any downstream circuit changes. The biggest misses usually come from code requirements, access constraints, and the time needed to make the changeover safely and cleanly.
Read the answerTrade GuidesHVAC estimating for small contractors: what to track in every bid
You need to track equipment cost, labor hours, ductwork and fittings, controls, refrigerant-related items, permits, subcontracted scope, and all job-specific site conditions. HVAC bids go wrong when contractors price the visible equipment but miss the accessories, coordination, access, and labor needed to install it correctly.
Read the answerTrade GuidesHow to Estimate Drywall and Framing Jobs More Accurately
Drywall and framing estimates get more accurate when you break the job into assemblies, price labor separately from materials, and include waste, fasteners, blocking, and site conditions instead of treating everything as a lump sum. The biggest mistakes come from undercounting details like layout complexity, openings, ceiling height, and crew productivity.
Read the answerTrade GuidesConcrete Estimating: Tips for Accurate Bids
Concrete estimates get more accurate when you separate formwork, reinforcement, placement, finishing, and site conditions instead of pricing the pour as one lump sum. The biggest errors come from missing prep work, undercounting labor, and ignoring waste, access, and schedule constraints.
Read the answerTrade GuidesPlumbing Estimating: A Complete Guide for Contractors
A good plumbing estimate starts with a full scope review, then breaks the job into fixtures, piping, labor phases, and site conditions before pricing. The most common misses are hidden fittings, fixture rough-in labor, equipment connections, and the extra time required in remodel or occupied spaces.
Read the answerTrade GuidesHow to Estimate an Electrical Job Accurately
Start with a complete scope, then count every device, feeder, circuit, fixture, and labor step before you price anything. The biggest errors come from missing scope, undercounted labor, and using vague unit prices instead of breaking the job into installation tasks and material takeoff.
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