Every home job presents the same honest trade. Do it yourself and you save the labour — typically 40–50% of a job’s price, because labour is usually the biggest line on a contractor’s quote. Hire it out and you buy back your time, your weekends and, on the risky jobs, your safety. Neither answer is always right; the skill is knowing which job is which before the first tool comes out.
DIY also spends things that never appear on a receipt: your time, a tool budget that grows with every project, and risk — the chance that a mistake costs more than the saving. Some jobs forgive beginners completely. Others punish a small error with a flood, a fire risk or a wall that has to come down. This guide gives you a framework for telling them apart, then applies it job by job.
Four questions to ask first
Before any specific job, run it through these four questions. One bad answer is usually enough to settle it.
- Can a mistake hurt someone, or flood or burn the house? If yes, the saving is never worth it — hire it.
- Does it need a licence or an inspection? Gas work, major electrics and structural changes are regulated in most places; unlicensed work can void insurance and stall a house sale.
- Have you done anything like it before? A similar, finished job is the best predictor of success. A first attempt at the hardest version of a skill is where DIY budgets go to die.
- What is your time honestly worth this month? A “two-hour job” that eats three weekends has a real cost. Price it — don’t pretend it is free.
Score the job honestly. Painting a bedroom passes all four easily. Moving a fuse box fails the first two before you even reach your diary. Most jobs sit between the extremes, and that is where the table below earns its keep.
Job by job: DIY or hire?
| Job | Verdict | Why |
|---|---|---|
| Paint a room | DIY | Low risk, mostly patience |
| Lay laminate flooring | DIY | Designed for homeowners |
| Tile a splashback | DIY with care | Small area, forgiving |
| Build a deck | DIY if experienced | Structure and levels matter |
| Fit a water heater | HIRE | Gas, water and venting risks |
| Rewire or move a fuse box | HIRE, licensed | Legal and safety |
| Plaster a ceiling | HIRE for most | The hardest finish to fake |
| Move a wall | HIRE | May be load-bearing |
Read the pattern, not just the rows. The DIY column is full of surface jobs — things you can see, reach, and redo cheaply if the first attempt disappoints. The HIRE column is full of systems — gas, water, electricity, structure — where the work hides behind walls and mistakes surface late and expensively. Cosmetic? Consider DIY. Structural or serviced? Hire.
The hidden costs of DIY
The receipt from the tool shop is only the start. Add tool purchase or hire — a tile cutter, a floor sander, a breaker — which can eat a third of the labour saving on a one-off job. Add materials wasted learning: the first two rows of tiles, the mis-cut boards, the extra tin of paint opened at the wrong moment. Add the redo risk, the chance the whole attempt comes out and starts again. And add your weekends, plural, because almost every job takes twice the estimated time the first time you do it. Price a room’s materials exactly with the Paint Calculator before deciding the saving is real.
The hidden costs of hiring
Hiring has its own quiet charges. Most trades apply minimum call-out fees, so a twenty-minute fix can bill like half a day. Scheduling waits are real too: good contractors book out weeks ahead, and a leaking job does not care about their diary. And a vague quote invites extras — which is why the 3-quote rule exists: get three itemised quotes before deciding, so labour, materials and exclusions can be compared line by line. The Remodel Budget Calculator turns those quotes into a realistic total with contingency built in, instead of the rosiest number on the page.
Two tools settle most of the remaining arguments. For the job itself, the Remodel Budget Calculator shows what the project should cost done properly — which tells you exactly how much your own labour is “saving”, and whether that saving survives buying the tools. And when the job is really about a broken appliance rather than the room around it, the Repair vs Replace Calculator decides whether the machine deserves a repair at all, before you price anyone’s time.
Frequently asked questions
How much do I save doing it myself?
The labour share of the job — typically 40–50% of the contractor’s price — provided nothing goes wrong. Tools, hired equipment and materials wasted learning come out of that saving, so on small or one-off jobs the real figure is often lower.
What jobs should you never DIY?
Gas work, major electrics and structural changes. They combine the worst risks — safety, legality and insurance — and in many places they legally require licensed trades and an inspection, whoever owns the house.
How many quotes should I get?
Three, and itemised. A single total tells you nothing; three quotes broken into labour, materials and extras show you who is guessing, who is padding and what the job genuinely costs.
When does DIY actually cost more?
When a mistake means paying twice — buying the materials again, then paying a professional to fix both the original job and the failed attempt. It is most common on plumbing, electrics and any finish that cannot be patched invisibly.
Estimates only — local licensing rules vary; when in doubt, the safe answer is the professional.