A plumber's call-out fee in mid-2026 starts around $90 in most US metros before anyone has touched a wrench, and an electrician's minimum visit can run $150. Handymen sit somewhere between. That's the economic reality that makes DIY repairs worth learning: the labour is the cost. The materials for most household fixes — a flapper valve, a tube of caulk, a replacement outlet, a furnace filter — are between three and twenty dollars at any hardware store. Doing the work yourself is usually a matter of one short YouTube video, fifteen to forty minutes of effort, and the willingness to turn off a water valve or flip a breaker without panicking.
The ten fixes below cover the household issues that account for the bulk of unnecessary service calls. Each is genuinely safe for a non-professional. We've flagged the two on this list (electrical and gas-adjacent) where you should stop and call someone if anything feels off. Every cost figure is checked against current 2026 prices at Home Depot, Lowe's and Ace; tool lists assume you don't already own anything.
A note on tools before starting: you don't need a fully stocked workshop. A basic kit — adjustable wrench, Phillips and flathead screwdrivers, channel-lock pliers, utility knife, tape measure, and a cordless drill — will cover every job below. Expect to spend $80-150 building that kit once, then never again.
1. Running Toilet
The most common cause is a worn flapper valve in the tank — the rubber disc that lifts when you flush and re-seats afterward. After three to five years it stops sealing, water leaks past it constantly, and the fill valve cycles every few minutes.
Materials: Universal flapper, $4-8. Tools: None. Time: 10 minutes. Difficulty: 1/5.
Turn off the supply valve at the wall, flush to drain the tank, unhook the old flapper chain and lift it off the overflow pegs, snap the new one on, reattach the chain with about a half-inch of slack. Turn the water back on. If the toilet still runs, it's the fill valve next — a $12 part, twenty minutes of work, same level of difficulty.
Common mistake: a chain that's too tight holds the flapper open a hair; too loose and it won't lift fully. Half an inch of slack is the sweet spot.
2. Dripping Faucet
For a compression faucet (the older two-handle kind), the drip is a worn rubber washer inside the handle. For a single-lever cartridge faucet, it's the cartridge itself.
Materials: Washer kit, $3, or replacement cartridge, $15-25 depending on brand. Tools: Adjustable wrench, screwdriver, possibly a cartridge puller ($8). Time: 20-40 minutes. Difficulty: 2/5.
Shut the water off under the sink. Pop the decorative cap on the handle (it usually pries off with a butter knife), unscrew the handle, take the parts to a hardware store to match exactly. Same goes for cartridges — Moen, Delta and Kohler all use distinct cartridges; take the old one in rather than guessing.
Best for: anyone whose water bill has crept up; a steady drip wastes about 3,000 gallons a year.
3. Squeaky Door Hinge
WD-40 is the wrong choice here — it's a solvent that evaporates and the squeak returns. Use a lithium-based grease or, in a pinch, petroleum jelly.
Materials: White lithium grease, $5. Tools: Hammer, nail punch. Time: 5 minutes per door. Difficulty: 1/5.
Tap the hinge pin out from underneath with a nail or punch, wipe it down, apply a thin smear of grease, tap it back in. Open and close the door a few times to work the grease into the barrel. The fix lasts years.
4. Clogged Drain
Skip the drain chemicals. They're hard on pipes, especially in older homes, and they don't fix the underlying cause, which is almost always a hair-and-soap-scum clog in the trap.
Materials: Plastic drain snake ("zip-it"), $3-5. Tools: Bucket, channel-lock pliers, towel. Time: 10-30 minutes. Difficulty: 2/5.
For shower drains, run the zip-it down, pull up the clog (it's revolting; have a bag ready), flush with boiling water. For sink drains, place a bucket under the trap, unscrew the slip-nuts by hand or with channel-locks, dump and clean the U-bend, screw it back on snug. The trap is designed to come apart precisely because clogs are inevitable.
5. Loose Cabinet Hinge
When a cabinet door starts sagging, the screw holes in the box have stripped out. The fix is to give the screws something to bite into again.
Materials: Wooden toothpicks or matchsticks, wood glue. Tools: Screwdriver. Time: 15 minutes. Difficulty: 1/5.
Remove the screw, dab wood glue into the hole, push three or four toothpicks in until snug, snap them off flush, let dry 30 minutes, drive the screw back in. The toothpicks give the threads fresh wood to grip. Free if you already have toothpicks; a $4 bottle of Titebond glue lasts years.
6. Patching Drywall
Nail holes need a dab of spackle and a swipe of sanding. Fist-sized holes need a patch kit. Anything larger needs a drywall offcut and a backer.
Materials: Lightweight spackle, $6; self-adhesive mesh patch for medium holes, $5; sanding sponge, $3. Tools: Putty knife. Time: 15 minutes plus drying. Difficulty: 2/5.
For nail holes: scoop a bit of spackle on the knife, smear it into the hole, scrape flush. Dries in an hour. Sand lightly, paint over. For mesh patches: stick the patch over the hole, trowel spackle across it in feathered coats (each coat wider than the last), sand between coats, prime, paint.
Common mistake: trying to fill the whole hole in one thick pass. Three thin coats look invisible; one thick coat cracks.
7. Replacing an Outlet or Light Switch
This is the borderline job. It's genuinely simple — two or three wires, two screws — but the cost of getting it wrong is electrocution or a house fire. Treat it accordingly or call an electrician.
Materials: Standard 15A outlet $2, decorator-style $4, GFCI $18. Tools: Insulated screwdriver, voltage tester ($15 — non-negotiable), needle-nose pliers. Time: 20 minutes. Difficulty: 3/5.
Flip the breaker for that circuit. Test with the voltage tester on the existing outlet to confirm power is off — every time. Unscrew the cover plate, unscrew the outlet from the box, pull it forward, note which wires go where (or photograph it), unscrew the wires, transfer them to the new outlet in the same configuration. Black = hot, white = neutral, bare or green = ground.
Stop and call an electrician if: you see aluminium wiring, scorch marks, or more than one cable entering the box without clear matching pairs. Knob-and-tube houses are a no.
8. Caulk Around the Tub or Sink
Mildewed, cracking caulk is a leak waiting to happen. Replacing it is one of the highest-impact-per-effort fixes on this list — fifteen minutes and the bathroom looks renovated.
Materials: Silicone caulk (kitchen/bath rated), $7; caulk-removal tool, $4. Tools: Caulk gun, $5; utility knife. Time: 30 minutes plus 24 hours cure. Difficulty: 2/5.
Slice the old caulk along both edges with the utility knife and pull it out in strips. Clean the joint with rubbing alcohol and dry it completely — silicone won't stick to a wet surface. Cut the nozzle at a 45-degree angle, run a continuous bead, then smooth with a wet fingertip in one pass. Don't shower for 24 hours.
9. Sticking Window or Sliding Door
Vinyl and aluminium windows get sticky when grit accumulates in the track. Wood windows swell with humidity and stick from paint build-up.
Materials: Silicone spray, $6; for wood, fine sandpaper, $3. Tools: Vacuum, stiff brush. Time: 15 minutes. Difficulty: 1/5.
For vinyl/aluminium: vacuum the track, brush out anything stuck, wipe clean, spray silicone on a rag and wipe the track. Avoid WD-40 — it attracts grit. For wood: sand the swollen edge lightly, then rub a candle stub along the edge as a dry lubricant.
10. Replacing a Furnace Filter
The least glamorous job on the list and the one with the biggest payback. A clogged filter makes the furnace work harder, raises the energy bill, and shortens the equipment's life.
Materials: Pleated MERV 8-11 filter, $8-18 each (buy a four-pack). Tools: None. Time: 2 minutes. Difficulty: 1/5.
Note the size printed on the side of the old filter (e.g., 16x25x1). Pull it out, slide the new one in with the airflow arrow pointing toward the furnace. Replace every three months, more often with pets. Set a recurring calendar reminder; the savings on the energy bill alone pay for the filter several times over.
The honest math
If you do five of the above repairs over a year — a running toilet, a dripping faucet, a clogged drain, a caulk redo and a furnace filter — you've saved roughly $400-600 in service calls against $30-60 in materials. The cordless drill and screwdriver set you bought at the start has paid for itself in one weekend.
Two more force-multipliers: a small notebook of which size filter, flapper and outlet your house uses (saves the trip back to the hardware store), and a labelled shoebox of the leftover screws and washers from past repairs. The same fix tends to come up again two years later.
For more in the same direction, our roundup of 15 creative DIY tricks every homeowner must know covers the upstream skills — diagnosing problems before they need fixing. The 20 easy kitchen DIY tips are the room-by-room companion. And the full DIY, home and garden archive has the broader catalogue of projects to work through on the weekends you're feeling competent.
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