DIY or Hire a Professional? A Decision Guide
Use five practical questions to decide whether a home job is safe and sensible to do yourself, and which jobs in the UK should always go to a qualified trade.
Everyone has a story about a DIY job that went well and another about one that cost three times as much to put right. Whether to tackle a job yourself or hire someone is not just about money. It is about risk, time, tools, legal requirements and how much the result matters. This guide gives you a repeatable way to decide.
The five questions
1. What is the worst thing that could happen?
Imagine the job going badly. If the worst case is a patchy paint finish, DIY is low risk. If it is a flood, a fire, a structural failure or a fall from height, take it seriously.
2. Is it legally restricted?
Some work must be done by a registered or competent person:
- Gas work: Legally requires a Gas Safe registered engineer.
- Notifiable electrical work: In England, work in kitchens, bathrooms, new circuits and consumer units must comply with building regulations, usually by using a registered electrician or involving building control.
- Structural alterations: Removing load-bearing walls needs engineering input and building regulations approval.
- Asbestos: Do not disturb suspected asbestos. Seek a licensed specialist.
- Drainage and unvented hot water systems have their own rules.
If it is on this list, hire. Our permitted development and building regs guide explains the wider picture.
3. Do you have the skills and tools?
Be honest about your experience. A new tool bought for one job, plus a learning curve, may cost as much as hiring. Consider whether you can borrow or hire equipment.
4. How much time do you have?
A professional might do in a day what takes you three weekends, and a half-finished bathroom is no fun for a household. Compare your time's value, and how long the room or home will be unusable.
5. Will it affect your insurance, warranty or sale?
Poorly done work can invalidate cover, fail a buyer's survey or hold up a sale. Keep certificates and receipts for any regulated work.
A quick sorting guide
| Job type | Typical advice |
|---|---|
| Painting, simple decorating, hanging shelves | Usually DIY, with care |
| Replacing a tap, bleeding radiators, changing a light fitting | Often DIY for confident people, with isolation steps |
| Tiling, fitting a basic kitchen unit | DIY with practice, or hire for a neat finish |
| Roof repairs, chimney work, gutters on upper floors | Hire, because of fall risk |
| New circuits, consumer units | Registered electrician |
| Boilers, gas fires, hobs | Gas Safe registered engineer |
| Structural changes, extensions | Architect, engineer and builder with building control |
| Damp diagnosis, subsidence concerns | Independent specialist or surveyor |
Cost versus value
The cheapest option is not always DIY. Include:
- Tools and materials you do not already own
- Waste removal and delivery
- Time off work
- Cost of mistakes, which may involve a professional to fix
- The warranty or guarantee a professional may offer, if agreed in writing
Equally, hiring is not always better value for tiny tasks. Paying a call-out fee to hang a picture may feel wasteful, though an experienced person might make an awkward job easy.
How to be a good DIYer
- Read manufacturer instructions and watch reputable guidance.
- Isolate water, gas or electricity before touching anything.
- Wear the right protective equipment.
- Do not work at height alone.
- Stop if you find something unexpected, such as old cables, damp or suspected asbestos.
- Photograph work in progress, which helps if you later need a professional.
How to hire well
- Define the job clearly in writing, with photos.
- Get more than one quote for larger work.
- Confirm registration and ask to see certification where it applies.
- Agree price, timing and payment stages.
- Do not pay everything upfront.
On Compito you can search by postcode, compare ID-verified local providers and send a request to get an offer, then message the provider directly and pay online once you accept. See how it works.
A worked example: replacing a bathroom tap
A confident DIYer might replace a basin tap: isolate the supply with the valves under the basin, disconnect the old tap, fit the new one and test. Total risk: a drip or a mess. Now change the job: the tap is part of a combination system on an unvented hot water cylinder, or the isolation valves do not exist and the stop tap is seized. The risk rises, and so does the case for hiring a plumber. The same job on paper can sit on either side of the line depending on the system and your experience.
Warning signs you are out of your depth
- You cannot find where to isolate the supply.
- The instructions mention a "competent person" or building regulations.
- You are about to use a tool you have never held.
- The job involves working at height without proper access.
- You feel pressure to rush, because the room or the supply will be off.
If you notice two or more, stop and get advice.
Combining DIY with professional help
You do not have to choose all or nothing. You can strip wallpaper and let a plasterer skim; clear a garden and let someone else lay the patio; assemble units and ask a fitter for plumbing and electrics. Be clear who does what, and what each person will not do. See how to write a job brief for how to describe the split.
If you are renting
Tenants usually need permission before altering a property and should not carry out repairs that are the landlord's responsibility. Report faults in writing and check your tenancy agreement; see tenant vs landlord repairs in England.
Frequently asked questions
Is it illegal to do my own electrical work?
In England, homeowners can generally do some electrical work themselves, but notifiable work must meet building regulations and be inspected or certified. Many people choose a registered electrician for this reason.
Can I do my own plumbing?
Many minor plumbing tasks are fine for competent DIYers, but work on unvented cylinders, gas and anything affecting water supply regulations should go to qualified people.
What jobs are worth always hiring out?
Anything involving gas, notifiable electrics, structure, roofs at height and asbestos are the usual answers.