The Quick Answer
The safest way to choose a builder for a home renovation in Medway is to get at least three detailed written quotes, verify insurance and trade body membership directly rather than trusting a website badge, check the Medway Fair Trader Scheme directory, and agree a staged payment schedule where you never hand over more than 10 to 15 percent upfront. A June 2026 survey from the Federation of Master Builders found that homeowners under 35 are far more likely to hire on reviews alone, with just 8 percent checking trade body membership, which is exactly how rogue traders get through the door. Ask to see two or three completed local projects before you sign anything, and treat any builder who wants a large cash deposit or refuses a written contract as a hard no.
Why does choosing the right builder matter so much in Medway right now?
Medway has seen steady demand for extensions, loft conversions and whole house renovations over the past few years, and that demand has pulled in a wide mix of contractors, from established local firms to one-van operators who disappear between jobs. Medway Council runs its own Fair Trader Scheme precisely because trading standards complaints about home improvement work remain one of the most common types of consumer complaint in the area.
Getting this decision right protects more than your budget. A renovation project ties up part of your home for weeks or months, involves other people working inside it, and often needs building control sign-off before you can sell or remortgage. The wrong choice of builder can mean unfinished work, uninsured damage, or a project that simply stalls.
What should you check before you even ask for a quote?
Do this groundwork before a builder sets foot in your home:
- Ask friends, neighbours or local Facebook groups for names, and look for a track record of similar jobs rather than a five star average alone
- Ask to see two or three completed projects of a similar size and type, ideally ones you can view in person or speak to the homeowner about
- Search the builder's name plus "Companies House" to check how long the business has actually traded
- Check the Medway Fair Trader Scheme directory, which lists local businesses that Medway Council's own Trading Standards team has pre-inspected
- Verify any trade body membership directly with the body itself (the Federation of Master Builders has a "Check a Member" tool), rather than trusting a logo on a website, since logos can be copied
That last point matters more than it sounds. A 2026 FMB and HomeOwners Alliance survey found that only 8 percent of homeowners under 35 check trade body membership before hiring, against 21 percent of those over 55. FMB chief executive Brian Berry put it bluntly: "Young homeowners are hiring builders the same way they would order a takeaway, scrolling through reviews and choosing whoever has five stars." Reviews are useful, but they are not verification.
How many quotes should you get, and what should a good one include?
Get at least three written quotes before you decide anything. A proper quote, not a rough estimate, should set out:
- A clear scope of works describing exactly what is and is not included
- Materials specified by name or standard, not just "supply and fit"
- A realistic start date and programme length
- Payment terms and a staged schedule tied to project milestones
- Named insurance cover, including public liability
- Who holds the CDM 2015 principal contractor role if the project needs it
Quotes that vary by more than 20 percent usually come down to what is and is not included, rather than one builder simply being cheaper. Ask each one to explain any figure that looks unusually low. A quote that undercuts the others by a wide margin with no clear reason is one of the most common early signs of a problem later on.
What questions should you ask a builder before you hire them?
A short, direct conversation upfront saves a lot of stress later. Worth asking every builder on your shortlist:
- Can I see two or three completed projects similar to mine in Medway or the wider Kent area?
- Who will actually be on site day to day, and is that the same person I am speaking to now?
- Is this quote fixed price, and what specifically would change it?
- What is the realistic programme, and what happens if it overruns?
- Can I see your public liability insurance certificate?
- How do you handle snagging and disputes if something is not right at the end?
A builder who answers these clearly, without hesitation, is generally a safer bet than one who becomes vague on specifics or tries to move the conversation along quickly.
How much deposit should you pay a builder in Medway?
The standard deposit for a UK residential renovation is 10 to 15 percent of the total project cost, paid on signing the contract, with the rest released in stages as work is completed and inspected. On a £50,000 renovation, that is roughly £5,000 to £7,500 upfront, not £15,000 or £20,000.
| Stage | Trigger | Typical share of total cost |
|---|---|---|
| Deposit | Contract signed | 10% |
| Foundations or structural opening-up | Inspected and passed | 15% |
| Walls and roof structure | Up to wall plate or roof height | 15% |
| Roof watertight | Felting and tiling complete | 15% |
| First fix | Plumbing, electrics, plastering done | 15% |
| Second fix | Fittings, kitchen, bathroom installed | 15% |
| Completion | Snagging finished and signed off | 15% |
The principle behind this structure is simple: you pay for work that has actually been done, not work that has been promised. Higher deposits can be reasonable for bespoke items such as made-to-measure windows or steelwork, where a supplier invoice justifies it, but 50 percent upfront on a standard renovation is excessive and should prompt questions, not just a shrug.
What are the red flags of a rogue builder?
Be cautious of a builder who does any of the following:
- Refuses to provide a detailed written quote or written contract
- Is reluctant to give you references you can actually contact
- Cannot show evidence of insurance when asked directly
- Asks for a large cash payment "to avoid the VAT"
- Claims they need a big deposit immediately to "hold your slot" or "buy materials", when an established trade account should cover this
- Guarantees there will be no unexpected costs on a project that has not been fully surveyed
- Repeatedly misses calls, texts or agreed appointment times before work has even started
Reassuring sign vs red flag, at a glance
| Reassuring sign | Red flag |
|---|---|
| Provides a detailed written quote and contract | Works on a verbal agreement or a one line estimate |
| Shows insurance and trade body membership unprompted | Becomes vague or defensive when asked |
| Asks for 10 to 15% deposit, staged payments after | Wants 40 to 50% upfront, or cash only |
| Happy for you to speak to previous clients | Cannot provide contactable references |
| Sticks to agreed appointments and communicates delays | Repeatedly misses calls or turns up unannounced |
How Meridian Contractors approaches this differently
We are a Chatham based contractor working across Kent and London, and we build our process around the exact points above rather than around getting a signature quickly. Every domestic project goes through our renovations and extensions service with a detailed written quote, named on-site team, and a staged payment schedule agreed before work starts. For larger or more complex jobs, our residential construction and project management teams handle everything from initial design through to building control sign-off, so you are dealing with one accountable team rather than a chain of subcontractors.
Ready to get a proper, itemised quote for your Medway renovation? Get in touch with our team and we will talk through your project, timescale and budget before anything is signed.
Frequently asked questions
How much does a home renovation cost in Medway? Costs vary widely by project type, size and specification, so a proper quote from a site visit is the only reliable figure. As a starting point for comparison, always ask for a full breakdown showing labour, materials and any professional fees separately.
Should I use a builder who is not on the Medway Fair Trader Scheme? Not being on the scheme does not automatically mean a builder is unreliable, since membership carries an annual cost that not every good local trader chooses to pay. Use it as one positive signal among several, not the only test.
Do I need a written contract for a small renovation job? Yes. Even a straightforward kitchen or bathroom renovation should have a written scope of works, price and payment schedule. Verbal agreements are the single most common source of disputes over what was actually promised.
How do I check a builder's insurance is genuine? Ask for the insurer's name and policy number, then contact the insurer directly to confirm the policy is active and covers the work in question, rather than relying on a certificate alone.
What is the difference between a deposit and a retention? A deposit is paid upfront to secure the contract. A retention is a small percentage, typically 2.5 to 5 percent, held back by you until after completion to cover any snagging issues that come up once you have lived with the finished work for a few weeks.