Guides
Step-by-step how-to guides, and what building work and the money around it actually cost, worked out line by line from prices you can check.
Most cost pages online give you a range per square foot and stop. That number is useless the moment your job differs from the one they had in mind, and you can't tell how far off it is because nothing behind it is shown. These guides go the other way. Each one takes a real, stated job, measures it, prices every line from a dated source, and then does the money part: what it costs to finance, when it pays back, and what goes wrong with the budget. The how-to guides do the same for doing the work yourself: the steps in order, the check that tells you each one is right, and what a mistake costs to fix.
How-to guides
Step by step, with the materials list worked out, the checks that tell you each step is right, and what the mistakes cost to fix.
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How to replace garage door springs
How-to
A pair of extension springs with safety cables costs $37.97 at Menards, against $300 to $400 for a service call. Torsion springs go to a technician at $350 to $540, because the $195 to $385 you would save is too little for the risk.
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How to install an interior door
How-to
A 30-inch prehung door with casing, shims, nails and a knob comes to $173.01 in materials; Homewyse puts the same job hired at $529 to $804.
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How to install a replacement window
How-to
One vinyl double-hung insert with sealant, foam, backer rod and shims costs $719.74 to put in yourself; the installation labor you skip is $100 to $400 a window.
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How to measure a roof for shingles
How-to
A 44 by 30 ft house at 6/12 has 1,645.7 sq ft of roof, 24.7% more than its footprint, and a hip roof on it takes 59 bundles once waste is in.
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How to repair a roof leak
How-to
Replacing one torn shingle costs $52.92 in materials, against about $343 for a roofer's service call. The catch is finding the leak: water on the ceiling usually got in somewhere uphill.
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How to install a metal roof
How-to
Steel panels on a 30 by 24 ft garage come to $2,555.95 done yourself, tear-off and permit included, against about $6,298, or $718 a square, at a roofing contractor's cost structure.
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How to build a deck, step by step
How-to
A 12×16 attached deck built to DCA 6 takes about $2,512 in materials and about 80 crew-hours for two first-timers. The mistakes that cost the most are all in the framing.
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How to repair cracks in concrete
How-to
A driveway with 30 ft of cracks, 44 ft of failed joints, a chipped spot and an oil stain takes about $130 of material and six hours, with the filler matched to each crack's width.
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How to fix drywall cracks for good
How-to
A cracked seam, a crack off a door corner and four nail pops take $68.23 of material and three short sessions to fix, against $336.49 for a taper.
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How to paint kitchen cabinets
How-to
Painting the cabinets in a 10 by 12 kitchen takes about $216 of materials and a week, against $778 to $1,554 for a painter and $4,500 or more to reface.
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How to paint a room
How-to
A 12 by 14 bedroom has 372 sq ft of wall. Two coats take 1.86 gallons, so you buy two, and the job costs about $241 against $372 to $744 for a painter.
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How to hang wallpaper
How-to
Counted strip by strip, a 12 by 14 bedroom takes 10 double rolls of 20.5 inch paper with a 20.5 inch repeat, three more than York's own quick chart lists.
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How to install a frost-free outdoor faucet
How-to
Replacing an old hose bibb with a 12-inch frost-free sillcock costs $82.34 in parts with push-fit connections, against a $250 average for a plumber.
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How to replace a tub or shower faucet
How-to
On a working Moen Posi-Temp valve, new trim costs $109.99 and about an hour. Replacing the valve itself runs $273.36 in parts, plus an access hole in the wall.
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How to fix a leaky tub or shower faucet
How-to
A tub spout dripping once a second wastes about 2,083 gallons a year, $38.58 at New York City's 2026 water and sewer rate. The fix is a $6.99 washer pack or a $33.64 to $94.68 cartridge.
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How to install gutters
How-to
Parts for 104 ft of 5 inch gutter and four downspouts on a ranch house come to $771.47, against HomeAdvisor's $1,182 average. Put a downspout at each end, or the same roof needs 6 inch gutters.
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How to install vinyl siding
How-to
A 12 ft 6 in panel moves 1/2 inch or more a year, so every nail and gap has to let it slide. Siding a 1,284 sq ft ranch takes $1,977.30 in materials, against $3,852 to $15,408 hired.
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How to insulate an attic yourself
How-to
Topping up a 1,500 sq ft attic from R-19 to R-49 takes $1,491.74 in materials and safety gear and two days for two people, ending with 23 bags of fiberglass blown to 17 1/8 inches.
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How to install hardwood flooring
How-to
A 300 sq ft room of prefinished 3/4 inch oak costs $2,513.43 to nail down yourself and $3,533.46 hired before overhead, and most failures trace back to one moisture reading taken before the first board.
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How to install a paver patio
How-to
A 12 x 16 ft paver patio needs a 7-3/8 inch dig, 2.61 cubic yards of compacted base and 1,015 pavers. Built yourself it costs $2,120.27; hired, the direct cost is $4,035.95.
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How to epoxy a garage floor
How-to
A 20 x 20 ft garage takes one 2.5-car epoxy kit and one clear kit, $453.98 with a 10% contingency, and the data sheets say 3 days before the car comes back.
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Bathroom remodel steps, in order
How-to
The materials for a 5-by-8 hall bath cost $1,545.67 at September 2026 prices, about 6% of the $26,138 a contractor-built midrange bath ran in JLC's 2025 Cost vs Value report.
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How to install a toilet and flange
How-to
A straight toilet swap takes $240.70 in parts against a $374 average for a pro install. The expensive mistake is an overtightened supply nut, which can mean $320 to $960 of new flooring.
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Fixing a dripping faucet
How-to
A faucet dripping once a second wastes 3,000 gallons a year by the EPA's count, $55.57 at New York City's 2026 rates, so a $23.91 cartridge pays for itself in about five months.
Mistakes that cost money
The errors that show up on real jobs, each with what it costs to put right.
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Bathroom remodel mistakes that cost money
Mistakes
The second pail of waterproofing membrane behind a tub surround is $52.99. Leaving it off puts $927.75 back on the table on one 5-by-8 bath: $311.43 of cement board, membrane, tile and grout plus 16 hours of tile work at $38.52.
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Interior painting mistakes that cost money
Mistakes
Degreaser and sanding sponges for a kitchen of cabinets cost $20.48, which is 2.4% of the $854.25 of painter's time it takes to strip 18 doors and 6 drawer fronts and start over.
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Deck building mistakes that cost money
Mistakes
Ten mistakes on one 12x16 deck cost $502.00 to avoid while the framing is open and $9,007.50 to correct after the decking is down. The worst is three footings redone under a standing deck, $1,837.82, because it has to be jacked first.
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Roofing mistakes on an asphalt shingle roof
Mistakes
On a 2,000 sq ft gable roof the shingles cost $3,327.75 and everything the code and the shingle maker ask for on top of them costs $1,259.22, 37.8% of the shingle line. The nails that move a wind warranty from 110 to 130 mph cost $12.00.
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Tile installation mistakes that cost money
Mistakes
Three pails of membrane at the ANSI A118.10 rate cost $224.97. Tearing out and rebuilding the 82.22 sq ft shower they would have protected costs $2,059.28, or $25.05 a square foot, before a single tile.
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Concrete mistakes on a slab or driveway pour
Mistakes
Curing a 20 by 24 ft driveway costs $56.97 in 4 mil plastic, and NRMCA says concrete left to dry out can lose as much as 50 percent of its potential strength. Repouring it costs $4,808.09, $10.02 a square foot.
What building work costs
Real jobs priced line by line from dated public data.
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How much a 12×16 deck costs in 2026: pressure-treated vs composite
Building costs
A contractor-built 12×16 attached deck comes to about $7,940 in pressure-treated pine and $9,316 in entry-level composite. The $1,377 premium pays back by year 4 if you hire out the restaining, and takes about 24 years if you do it yourself.
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What a concrete patio or driveway slab costs in 2026
Building costs
Ready-mix runs $162 to $285 a cubic yard, but the truck is only about a fifth of the bill: a hired 12×16 ft patio comes to about $17.50 per sq ft, and replacing a 20×24 ft driveway about $16.80.
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Asphalt shingle roof replacement in 2026: cost per square
Building costs
A 2,000 sq ft gable house at 6/12 pitch carries 24.4 squares of roof. Tearing it off and re-roofing in architectural shingles comes to about $15,100, or $620 a square, before sales tax.
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Replacing windows in 2026: cost, and whether the energy savings pay it back
Building costs
Ten single-pane windows swapped for ENERGY STAR units save about $223 a year in a Philadelphia climate with gas heat. Against a $12,000 job that is a 54-year payback, and the federal credit ended with 2025.
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Attic insulation in 2026: cost and payback by climate zone
Building costs
Topping up 1,500 sq ft of attic from R-19 to R-49 costs about $1,310 in DIY materials and saves $80 to $125 a year, a 10 to 16 year payback. Going on to R-60 adds about $600 for $8 to $13 a year.
Money
Financing, pricing and the cash side of a project.
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Paying for a renovation in 2026: HELOC, cash-out refi, loan or cash
Money
With a 3.25% first mortgage, a cash-out refinance at 6.95% makes $60,000 of renovation money cost about 21.7% in first-year interest, against 8.275% on a HELOC.
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How to price a remodeling job: overhead, markup and break-even
Money
A carpenter paid $30.71 an hour costs a small remodeler $52.81 for every billable hour, and a company pricing at "10 and 10" on top of that loses about $97,000 on $713,000 of work.
Material prices
Monthly notes from the Producer Price Index.
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Building material prices, August 2026
Prices
Producer prices for residential construction goods rose 7.8% in a year, led by copper wire (+27.2%) and steel mill products (+23.4%). Passed through in full, that adds about $277 to a 12×16 deck's materials and $151 to a 2,000 sq ft shingle roof.
Where the prices come from
Material prices come from two places. For trends we use the Producer Price Index from the Bureau of Labor Statistics, which tracks what manufacturers and mills charge for lumber, ready-mix concrete, gypsum board, copper wire, steel and roofing. It moves before retail prices do, so it tells you which way your quote is heading. For the price you actually pay at the counter, we use dated product pages from national retailers and suppliers, and we record the price and the day we saw it.
Labor is where most estimates hide their guesswork. We price it from the Occupational Employment and Wage Statistics survey, which publishes what carpenters, roofers, cement masons, insulation workers and glaziers earn, nationally and by state. A wage isn't what a contractor charges you, so each guide shows how it goes from the wage to a billed rate: payroll taxes, insurance, unbillable time, overhead and profit. You can disagree with any of those steps, and because they're written down, you can see exactly where.
Energy prices for payback math come from the Energy Information Administration, by state. Mortgage and home equity rates come from Freddie Mac's weekly survey and the Federal Reserve's published data. Tax credits and deductions come from IRS publications and the text of the law, checked for the year the guide covers, because incentives in this area change often and a guide quoting last year's credit costs real money.
How a job gets measured
A guide starts with a takeoff, the way an estimator starts a bid. A 12 by 16 deck becomes a count of joists, beams, posts, footings, boards, screws and railing feet. A roof becomes squares, bundles, rolls of underlayment and feet of drip edge, adjusted for pitch and waste. Those quantities run through the math module behind the matching calculator on this site. That way the guide can't say one thing while the calculator says another, and you can take the same inputs, change the ones that differ for your job, and get your own number.
Every guide then prices three versions of the job. The low case uses the cheapest sound choices and a region with low labor rates. The high case uses premium materials, a high-wage state and the surprises that show up most often, like rotten decking under a roof or a second layer of shingles. The typical case sits between them and says why.
The money part
A cost is only half a decision. The other half is what the money costs and what it earns back. So the guides compare paying cash with borrowing against the house at the current rate, show what an energy upgrade saves per year at your state's energy price, and work out whether that saving ever covers the bill. When it doesn't, the guide says so. A window replacement can be worth doing for comfort, noise or rot and still never pay for itself in energy, and you should know which of those you're buying.
For contractors, the same rules apply from the other side of the table: what a field hour really costs once taxes, insurance and idle time are in it, how markup turns into margin, and the break-even revenue that keeps the business open through a slow quarter.
What we won't publish
A price we couldn't trace to a source or build from stated inputs doesn't go in. Neither does a claim about a product we haven't seen documented, a testimonial, or a case study about a client, because there are no clients here. If a question can only be answered by opinion, the guide gives you the numbers and the trade-off, and leaves the call to you.
Guides also say what they don't cover. Structural design, electrical work beyond sizing a circuit, and anything that needs a permit and an inspection still needs the person who signs for it. The numbers here help you budget, compare bids and ask better questions. They don't replace the plan reviewer or the licensed pro.
When we get it wrong
Prices move and we'll miss things. When a reader shows us a better source or a mistake in the math, we fix the guide, update the date, and note what changed. You can check the method behind the rest of the site on the about page and in our research, including the one conclusion we published and later had to correct.
Frequently asked questions
Are these prices what I will pay?
They are what the job costs at the prices we could document on the date shown, in the case we describe. Your quote will differ with your region, your contractor's overhead, the season and what they find once the old material comes off. Each guide shows its inputs so you can swap in your own prices and rerun the math with the matching calculator.
Why don't you use the cost numbers from the big home services sites?
Because we can't see how they were built. A figure like "$25 to $45 per square foot" with no quantity, no material price and no labor rate behind it can't be checked or adjusted to your job. When we mention those figures at all, it's as a labeled cross-check against our own line-by-line estimate.
How often are the guides updated?
Material prices get a monthly data note built from the Producer Price Index. The project guides are reviewed when an input they rely on moves enough to change the answer, and every guide shows the date its prices were collected. A cost guide with no date on it is wrong eventually, and nobody can tell when.
Does anyone pay for placement in these guides?
No. No manufacturer, retailer, lender or contractor pays to be mentioned, and none gets to see a guide before it's published. Where a guide names a product or a store, it's because that's where the dated price came from. Advertising on the site pays for the work.
What if I find a wrong number?
Write to [email protected] with the guide, the number, and the source that says otherwise. Arithmetic errors get fixed first, and the guide says what changed and when.