Rules and the company
How to Choose a Loft Conversion Company in Nottingham
A good loft conversion company has local experience, appears on the register of any trade body it claims and prices the job in an itemised quote you can compare line by line. The checks below run in the order you make them, from finding companies to agreeing the quote, with examples from companies in and around Nottingham.
Find loft conversion companies with local experience
Checkatrade’s advice on hiring a loft conversion company is to check reviews, ask friends, family and neighbours, and ask other tradespeople which companies they recommend.
Put local experience first as well, Checkatrade says, meaning a company that knows local planning, building regulations and suppliers. Among the Nottingham loft conversion companies compared on memberships and guarantees, Lady Bay Loft Conversions takes care of planning permissions and building control certificates, and XL Lofts in Heanor has an in-house specialist architect.
Check FMB, TrustMark and other memberships
Ask whether the company, or its lead tradespeople, belong to a recognised trade body such as the Federation of Master Builders (FMB), Checkatrade advises, since membership schemes often include their own inspection standards and, in some cases, an insurance-backed guarantee.
A company that names a scheme on its website should appear on that scheme’s own register, so look it up before you meet.
| Scheme | Where to look a company up | What the register shows |
|---|---|---|
| Federation of Master Builders | The Find a builder search, by company name | How long a member has belonged to the FMB |
| The Guild of Master Craftsmen | The members directory on findacraftsman.com, by name | Whether the company is a member |
| Which? Trusted Traders | The list of endorsed traders, by trade and town | Traders endorsed by Which? |
| TrustMark | The find a tradesperson search | Registered businesses, while the page for an unregistered business says “Business not found” |
Roof Rooms in Ilkeston, for example, has been an FMB member since 2014 and is a corporate member of the Guild of Master Craftsmen.
Meet two or three companies and follow up references
Shortlist two or three companies and meet each one in person, Checkatrade advises, then speak to their previous customers and follow up the references. The good companies are usually busy, Checkatrade says, so be prepared to wait.
Compare the guarantees as well, since they differ in length. Roof Rooms gives a 10-year guarantee covering the structural work and all associated works, and M.R Conversions in Jacksdale backs all its work with a 5-year guarantee as standard.
Questions to ask a loft conversion company
Ask every company the same questions at the meeting and write the answers down, so you can set them side by side later.
- Do you, or your lead tradespeople, belong to a trade body such as the FMB?
- Does that scheme come with an insurance-backed guarantee?
- Can I speak to some of your previous customers?
- Who draws the plans, and who deals with planning permission and building control?
- Which parts of the work do you subcontract?
- What guarantee do you give, and what does it cover?
- When could you start?
Compare itemised loft conversion quotes like for like
Get quotes from several companies, itemised so you can compare them like for like, Checkatrade advises. For each quote, check whether architect plans are needed and included, whether the fixtures and fittings are in the price, and which trades it covers, such as the plasterer, electrician, bathroom fitter, painter and decorator, and carpenter.
Check whether the building regulations costs are included too, because building regulations approval is required to convert a loft into a liveable space, the Planning Portal says. Give every company the same description of the job, so each quote prices the same conversion.
Asking for a loft conversion quote
Do this
Please quote for a rear dormer loft conversion on our three-bedroom semi, making a double bedroom with an en-suite shower room. Itemise the architect plans, structural engineer calculations, building regulations fees, steelwork, staircase, electrics and plumbing, bathroom fittings, plastering and decoration, and say which of them the price leaves out.
Not this
Can you give us a price for a dormer loft conversion?
Ask which of the hidden costs of a loft conversion each quote covers. On Checkatrade’s figures they include architect drawings at £1,000 to £2,000, structural engineer calculations, planning permission fees, party wall agreements and a bat survey at £400 to £750 if one is required, and together they can add 10 to 15%.
Many homeowners plan a contingency of 10 to 15% on top of the quote, Checkatrade says, and older roofs can reveal extra strengthening work once they are opened up.
Budgeting around a £50,000 dormer quote
| 30m² dormer conversion at the average price | £50,000 |
|---|---|
| Architect drawings, if the quote leaves them out | £1,000 to £2,000 |
| Contingency of 10 to 15% on the quote | £5,000 to £7,500 |
Total £56,000 to £59,500
On Checkatrade's figures. Structural engineer calculations, planning fees, party wall agreements and a bat survey, if one is required, come on top.
Agree a written quote, not an estimate
A quote is a promise to do the work at an agreed price, while an estimate is only the trader’s best guess, Citizens Advice explains. A company cannot charge more than a quote without a good reason, such as extra work you agreed to pay for or an obvious mistake, and a rise in its own costs does not count.
Do not go ahead on an estimate alone
If the final bill comes in above an estimate, the law only says the price should be reasonable and does not say what counts as reasonable, so you are left to agree the figure with the company.
Once you give a company the go-ahead, you have a contract, even if nothing is written down, and anything you took into account before agreeing is part of it, Citizens Advice says. If the company subcontracts some of the work, you still take any problem up with the company that arranged it.
Before you agree the loft conversion quote
- The price is written as a quote, not an estimate
- Each item has its own price, so it lines up against the other quotes
- It says whether architect plans, fixtures and fittings and the building regulations costs are included
- It names the trades included, such as the plasterer, electrician and carpenter
- It says whether the price includes VAT
- Any guarantee is in writing, with its length and what it covers
- It gives a start date, and a finish date if the timing matters to you
If the conversion has to be finished by a certain date, say so and put the date in the quote. Unless you made that clear, a company that runs late has to be given a second chance to finish, Citizens Advice says.
Common questions
How do I find a good loft conversion company?
Check reviews, ask friends, family, neighbours and other tradespeople for recommendations, and favour a company with local experience, Checkatrade advises. Shortlist two or three companies, meet each one in person and follow up references from previous customers. Look up any trade body a company claims, such as the Federation of Master Builders, on that scheme's own register.
What questions should I ask a loft conversion company?
Ask whether the company or its lead tradespeople belong to a trade body such as the FMB, and whether that scheme includes an insurance-backed guarantee. Then ask to speak to previous customers, and ask who draws the plans, who deals with planning permission and building control, which work is subcontracted, what the guarantee covers and when the company could start.
What should a loft conversion quote include?
A loft conversion quote should be itemised and say whether architect plans, fixtures and fittings, the trades and the building regulations costs are included, Checkatrade advises. Ask which hidden costs it covers too, such as architect drawings at £1,000 to £2,000 and a bat survey at £400 to £750 if one is required, on Checkatrade's figures.
How do I check a builder is an FMB member?
Search the Federation of Master Builders' Find a builder page on fmb.org.uk by company name. A member's entry says how long it has been a member, and Roof Rooms in Ilkeston, for example, has been an FMB member since 2014. Any other scheme a company names should list it on that scheme's own register.
Can a loft conversion company charge more than the quote?
Only for a good reason, such as extra work you agreed to pay for or an obvious mistake in the quote, Citizens Advice says. A rise in the company's own costs is not a good reason. An estimate is different, because the final price only has to be reasonable and the law does not say what counts as reasonable.
What can I do if a loft conversion company does a bad job?
You can ask for the problem to be fixed or for a refund, because the Consumer Rights Act 2015 requires the work to be done with reasonable care and skill, Citizens Advice says. If the company supplied the materials as well as the work, ask it to fix the problem, and if it cannot or will not, ask for a partial or full refund. The refund should reach you within 14 days of agreeing the amount.
What happens if a loft conversion runs late?
You have to give the company a second chance to finish, unless you made clear the work had to be finished by a certain date, Citizens Advice says. If the finish date matters to you, say so and put it in the quote before you agree it.
Where the figures come from
- Checkatrade, how to hire a loft conversion company read 2026-09-17
- Checkatrade, loft conversion cost read 2026-09-17
- Planning Portal, building regulations approval for a loft conversion read 2026-09-17
- Federation of Master Builders, find a builder read 2026-09-17
- The Guild of Master Craftsmen, find a craftsman read 2026-09-17
- Which? Trusted Traders read 2026-09-17
- TrustMark, find a tradesperson read 2026-09-17
- Citizens Advice, problem with building work, decorating or home improvements read 2026-09-16
Next
The Best Loft Conversion Companies in Nottingham
Ten firms, ranked on trade memberships, written guarantees and years in the trade.