Construction guides
Estimating and takeoff, explained the way estimators actually work
Question-first guides with worked numbers, not theory. Each guide links to the glossary terms it uses.
How to level construction bids
To level construction bids, build a bid tab that lays out every sub's pricing by scope line item, then normalize each bid to identical scope by pricing in excluded work, comparing alternates on the same assumptions, and adjusting for qualifications. Award on the lowest adjusted total for the scope the owner will actually sign, not on the lowest cover number, because the low cover number and the lowest real cost are often different bidders.
Read the guideConstruction AP automation: how invoice processing actually works
Construction AP automation captures subcontractor and supplier invoices, extracts the header and line data, suggests cost codes, matches each invoice against the commitment it belongs to, routes it for approval, and syncs the approved entry to your accounting system. It differs from generic AP because every invoice has to reconcile against a subcontract or purchase order, hold retainage per pay application, and clear a lien waiver before money moves. Done well, it removes the manual data entry and matching hours while keeping a human on the coding and approval decisions.
Read the guideThe construction bid process, step by step
The construction bid process runs from finding the opportunity through document and site review, a bid/no-bid decision, sub invitations and quote collection, takeoff and estimate, bid leveling, general conditions and markup, submission, and finally buyout. Most time and risk concentrate in the takeoff and the leveling of sub quotes, where a single missed scope item or apples-to-oranges comparison can erase the margin. AI now compresses the takeoff step, but the estimator still signs off on the number.
Read the guideConstruction cost codes: how job costing actually gets structured
Construction cost codes are the standardized labels that route every dollar on a job to a specific scope of work and a specific kind of cost, so the estimate, the budget, and the actuals all speak the same language. Most US commercial contractors build them on the CSI MasterFormat divisions, then extend each code with a cost type such as labor or material. The point is a closed loop: what you estimated becomes the budget, the field charges actuals against it, and those actuals feed your next bid.
Read the guideConstruction estimating for beginners
Construction estimating is the work of turning a set of drawings into a defensible price. A beginner learns the mechanics in months: read the documents, perform a quantity takeoff, apply unit costs, then add overhead, profit, and contingency to reach a bid. The judgment about risk and means and methods grows over years and stays with the estimator, even as AI tools speed up the measuring.
Read the guideCost per square foot for commercial construction: how to use the number without being burned by it
Cost per square foot (psf) is a project's cost divided by its floor area, and it is a sanity check at the concept stage, not a bid basis. The number is only meaningful once you state its scope (hard costs, soft costs, and land are not the same) and its area definition (gross versus rentable). Because building type, region, height, and finish move it by multiples, the only psf you can trust is the one you derive from your own completed jobs.
Read the guideGMP vs lump sum vs cost-plus contracts
Lump sum gives the owner a fixed price and puts cost overrun risk on the contractor, while cost-plus reimburses actual cost plus a fee and leaves the owner carrying overrun risk. GMP sits between them: the contractor guarantees a ceiling, bills open-book against it, and any underrun is split per a savings clause. Unit price covers work where quantities are unknown at bid. Pick the model by how well the scope is defined and who should hold the contingency.
Read the guideHow to do a construction takeoff, step by step
To do a construction takeoff, assemble the current drawing set and confirm revisions and addenda, set up your takeoff by CSI division or cost code, verify scale, then count items (each), measure lengths and areas (lf, sf), and compute volumes (cy). Apply waste factors, cross-check against schedules and details, and hand the quantities to pricing. The result is a measured quantity list that becomes the foundation of the estimate.
Read the guideHow to estimate construction costs
To estimate construction costs, you review the full scope, perform a quantity takeoff from the drawings, price labor, material, and equipment against current unit costs, then add overheads, markup, and contingency to reach a bid price. The accuracy of the result depends almost entirely on the quality of the takeoff and the pricing data behind it.
Read the guideHow to estimate labor costs in construction
To estimate labor costs, multiply the quantity from your takeoff by a labor unit (hours per unit of work) to get total labor hours, then price those hours at a fully burdened rate that adds payroll taxes, insurance, and benefits to the bare wage. Adjust the labor unit for productivity factors like weather, height, congestion, and overtime fatigue, because labor risk, unlike material risk, stays on your books from bid day to closeout.
Read the guideLien waiver management: the four waiver types and when to use each
There are four lien waivers, built from two pairs: conditional or unconditional, and progress or final. The rule of thumb is simple. Use a conditional waiver before money moves, because it only takes effect once payment actually clears, and reserve unconditional waivers for after the funds have cleared, because they release the lien right the moment they are signed. Managing them well means exchanging the right type at the right step of every pay cycle, down to the second tier, and tracking each one against the pay application it backs.
Read the guideMarkup vs margin in construction estimating
Markup is profit expressed as a percentage of cost (you add it on top of cost), while margin is profit expressed as a percentage of the selling price. They use different denominators, so they never match: a 20 percent markup produces only a 16.7 percent margin. To convert, use margin = markup / (1 + markup) and markup = margin / (1 - margin), and to hit a target margin, divide cost by (1 minus the margin) rather than multiplying.
Read the guideHow to do a material takeoff (MTO)
To do a material takeoff, measure the work off the drawings, then convert each measured quantity into the units suppliers actually sell by dividing by the coverage of one unit, adding a waste or lap allowance, and rounding up to whole sheets, sticks, or tons. A material takeoff (MTO) lists what to buy; a quantity takeoff (QTO) measures the work, so the MTO is built from the QTO and feeds straight into purchase orders and buyout.
Read the guideThe construction pay application process, step by step
A construction pay application is the formal monthly request a contractor submits to bill for work completed, based on a schedule of values that divides the contract into priced line items. Each period you set a percent complete on every line, add any stored materials, subtract retainage, and net out what was already paid to reach the amount due. On most US commercial jobs this runs on the AIA G702 and G703 forms, moves through architect certification, and pays only after the matching lien waivers are exchanged.
Read the guideSubcontractor prequalification: what GCs check
Subcontractor prequalification is the structured review a general contractor runs before issuing bid packages, deciding which trades are allowed to submit a number. GCs check financial capacity and bonding, safety record (EMR and OSHA history), relevant experience and references, current backlog and crew capacity, plus licensing and insurance. A strong, current package gets a sub onto the bid list; a weak or stale one keeps the number from ever being opened.
Read the guideRFI vs RFP vs RFQ vs ITB: what each means
An RFI is a question (no award) used during bidding or construction. An RFQ asks for a price on a defined scope, awarded mostly on price. An RFP asks for a scored proposal, common on design-build, judged on more than price. An ITB or IFB is a sealed hard bid on complete documents, awarded to the lowest responsive bidder.
Read the guideThe 4 types of construction estimates
Construction uses four types of estimates, ordered by how much design information exists: rough order of magnitude (ROM), square foot, assembly, and detailed unit cost estimates. Accuracy tightens as design matures, from swings commonly framed as plus or minus 25 to 50 percent at ROM down to plus or minus 5 to 10 percent on a detailed estimate built from a full quantity takeoff.
Read the guideWaste factors in construction estimating
A waste factor is a percentage added to a measured (neat) takeoff quantity to cover material lost to cuts, breakage, overlap, laps, and error, so the buy quantity reflects what the field actually consumes. Apply it by multiplying the net quantity by one plus the waste percentage, then rounding up to the supplier's order increment. Commonly used US starting points run about 5 percent for concrete, 10 percent for drywall and tile, and 10 to 15 percent for lumber, each calibrated against a firm's own history.
Read the guideWhat is a construction takeoff?
A construction takeoff is the process of measuring and counting every item of work from the project drawings so it can be priced. The output is a list of quantities in standard units (each, linear feet, square feet, cubic yards) that becomes the backbone of the cost estimate. Estimators perform takeoffs manually, with on-screen software, or now with AI that reads the drawings directly.
Read the guideSkip ahead: watch Ruh price a bid from drawings.
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