HOW TO HIRE · TRADES & CONSTRUCTION

How to hire a loft conversion specialist in the UK
The checks, the questions and the paperwork.

A loft conversion needs building regulations approval or a Scottish warrant, and often party wall notice. The checks, the questions and the paperwork.

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THE 60-SECOND VERSION

Hiring a loft conversion specialist in five steps

  1. Check planning and building regulationsDifferent approvals; a dormer may need planning, and the conversion needs building regulations.
  2. Get structural calculationsNew floor joists and steels designed by an engineer.
  3. Serve party wall noticeIn England and Wales, usually needed in a terrace or semi.
  4. Plan the stairs and escape routeThe design should show how building control's fire requirements are met.
  5. Get the completion certificateWithout it, the loft room may not count as a room when you sell.

BEFORE YOU BOOK

Check before you book

No register applies

Anyone may trade as one of the loft conversion specialists — no licence or register exists in England, Wales, Scotland or Northern Ireland — and what the law regulates in the loft conversion is the building work, through approval where it is required. For the loft conversion, a trader should hold public liability insurance; check the insurer and the cover. Trader status matters: it brings the Consumer Rights Act 2015 into play, and under the Consumer Contracts Regulations 2013 an off-premises or online booking usually has 14 days' cancellation, with any work you asked to start early charged for and personalised goods outside the right.

Find out early whether the loft conversion needs approval or a warrant, and whose name is on the application. Ask for the insurance certificate before the loft conversion is booked, and look for the trader and ID-checked badges on the Locufy profile. gov.uk →

Building regulations approval

The loft conversion alters the structure and adds a habitable room, so it needs building regulations approval in England; building control checks the structure, stairs, fire safety and insulation. If the loft conversion is approved on full plans in England, expect building control's completion certificate within about 8 weeks of the finish, as long as it complies.

Before the loft conversion begins, ask to see the building control approval or reference. gov.uk →

Building warrant (Scotland)

A building warrant, where the loft conversion requires one in Scotland, is the owner's responsibility rather than the builder's; going without risks a fine and an order to remove the work. In Northern Ireland, council building control must hear about the loft conversion before it starts.

In Scotland, see the warrant before the loft conversion begins; in Northern Ireland, ask for the building control reference. mygov.scot →

Party wall notice

Under the Party Wall etc. Act 1996 you must tell neighbours in England and Wales before building work on or near a shared wall or boundary, and the loft conversion often is; a party wall agreement is separate from building regulations approval. Scotland has different rules.

Agree who serves party wall notice for the loft conversion, and when. gov.uk →

VAT

VAT on a loft conversion that stays part of your home is 20%, the standard rate — the 5% reduced rate applies only if the conversion changes the number of dwellings or the house had stood empty for at least two years — and a firm whose taxable turnover is above £90,000 has to charge it as its own line.

Ask for the VAT number, and look for VAT as its own line on the loft contract. gov.uk →

“Which type of loft conversion suits my roof?”

A good answer: Roof-light, dormer, hip-to-gable or mansard, with the reason and the price of each.

“Who designs the structure of the loft conversion?”

A good answer: A structural engineer's calculations for the new floor and steels, accepted by building control.

“How will the stairs and fire escape work?”

A good answer: A design building control will approve, explained in plain terms.

“Do I need planning permission for the loft conversion?”

A good answer: A clear view, with the planning route checked before work starts.

“Who serves party wall notice?”

A good answer: For a terrace or semi in England and Wales, named and timed before the start.

“How long will the loft conversion take, and can we live at home?”

A good answer: A written programme and how the house is protected when the roof is opened.

Getting the quote right

  • Conversion type and drawings referenced
  • Steels, floor joists and structural design
  • Stairs, insulation, windows and dormer covering
  • Building control and party wall costs and who pays
  • Who actually attends — the builders, roofers and each other trade on the loft, employed or subcontracted — and the business's VAT number, with VAT at 20% shown as its own line
  • Stage payments and programme

Walk away if

  • No structural engineer involved
  • Opens the roof before approval
  • Vague about stairs and fire escape
  • Large deposit before work
  • Says party walls don't matter in a terrace
LOW
£30,000
TYPICAL
£42,000
HIGH
£95,000

What a loft conversion specialist costs: £30,000–£95,000 per project

Loft conversions are quoted per project, mainly by the type — roof-light, dormer, hip-to-gable or mansard — with an en-suite and the stairs adding to it. Loft Conversion price guide →

Guide prices compiled by the Locufy team from published Irish and UK provider price lists and 2026/27 cost guides. Updated 2026.

KNOW WHAT TO LOOK FOR? NOW FIND ONE

Loft conversion specialists near you, with the badges that matter shown

ID checked, trader status and one score from every review — on the card, before you message anyone. Nearest first. No account needed to look.

Or post the job free and let them come to you.

  1. Design and approvalsDrawings, structural calculations, building regulations approval, planning if needed, party wall notice.
  2. Scaffold and structureScaffold up; new floor joists and steels installed.
  3. Roof worksDormer or roof alterations built and made watertight.
  4. Stairs and fit-outStairs, insulation, first fix, plaster, second fix.
  5. Inspection and completionBuilding control final inspection and completion certificate.

Dormer
A box-shaped extension that adds headroom in the roof.
Hip-to-gable
Building up the sloping end of a roof into a vertical wall.
Mansard
A conversion with a near-vertical rear roof slope.
Roof-light conversion
A conversion using windows set in the existing slope.
Escape route
The protected way out in a fire.
Steel
A beam carrying the new floor or roof loads.

AFTER

When the job is done

Keep the completion certificateAnd the approved drawings and calculations; a buyer's surveyor will check the loft room against them.
Collect the trade certificatesElectrical, glazing and any others.
Check the roof in heavy rainDormer junctions and roof windows dry.
Leave the reviewOnly booked jobs can be reviewed on Locufy, so yours carries weight; if the loft conversion falls short, use the make-it-right step first and the provider is asked to fix it before the review is published.

STEP 1Give the specialist a written chance to fix itMost problems with the loft conversion are settled at this stage: say what is wrong, attach photos and set a fair deadline. If the loft conversion fell below reasonable care and skill, the Consumer Rights Act 2015 entitles you to have it redone or to pay less.
STEP 2Use Locufy's make-it-right stepRate the loft conversion under four stars and you are asked whether to send it to the provider first; we follow it through. Then the review goes up.
STEP 3Unapproved or dangerous workAn approval that was needed for the loft conversion and never obtained is taken up by the council: building control in England, Wales and Northern Ireland, or in Scotland the building standards service, which holds the owner responsible for the warrant. For a dispute about the loft conversion with the trader, Trading Standards is reached through the Citizens Advice consumer helpline on 0808 223 1133 in England and Wales, Advice Direct Scotland on 0808 800 9060, or Consumerline on 0300 123 6262 in Northern Ireland.
STEP 4Money still in disputeIf the loft conversion is still not settled, you can claim without a solicitor: the small claims track takes claims up to £10,000 in England and Wales, simple procedure up to £5,000 in Scotland, and the small claims court up to £5,000 in Northern Ireland.

Hiring a loft conversion specialist: questions people ask

Yes: in England, Wales and Northern Ireland from building control, and in Scotland a building warrant.

No law licenses them; check building control, the structural design, insurance and finished examples.

£30,000–£95,000 a project, typically around £42,000. Roof shape and conversion type drive it. How the figure is built up is in the Loft Conversion price guide; search by postcode above to see what loft conversion specialists near you quote.

Sometimes; gov.uk says planning permission and building regulations approval are different, and you might need both.

In England and Wales, under the Party Wall etc. Act 1996, usually in a terrace or semi.

A buyer may not accept it as a room; get the certificate at the end.

MORE GUIDES

More hiring guides in trades & construction

How to hire: ArchitectHow to hire: Structural EngineerHow to hire: BuilderHow to hire: RooferHow to hire: Carpenter & JoinerHow to hire: Loft InsulationHow to hire: General ContractorHow to hire: House ExtensionAll 701 hiring guides →

Loft conversion specialists near you

Loft conversion specialists in LondonLoft conversion specialists in ManchesterLoft conversion specialists in BirminghamLoft conversion specialists in GlasgowLoft conversion specialists in BelfastAll loft conversion specialists on Locufy →

Sources — checked October 2026

  1. gov.uk — building regulations approval (England)
  2. gov.uk — building regulations: how to apply
  3. TrustMark — the Government Endorsed Quality Scheme
  4. mygov.scot — if a builder is doing the work for you
  5. nidirect — how to apply for Building Regulations approval
  6. gov.uk — party walls and building work
  7. Party Wall etc. Act 1996
  8. HSE — CDM 2015: domestic clients
  9. HSE — deciding if asbestos work must be done by a licensed contractor
  10. Consumer Rights Act 2015, section 49 — reasonable care and skill
  11. Consumer Rights Act 2015, section 54 — what you can ask for when a service falls short
  12. Consumer Contracts Regulations 2013, regulation 30 — the 14-day cancellation period
  13. Consumer Contracts Regulations 2013, regulation 28 — contracts the cancellation right does not cover
  14. Consumer Contracts Regulations 2013, regulation 36 — services started within the cancellation period
  15. Civil Procedure Rules Part 26 — the small claims track limit (England and Wales)
  16. Scottish Courts and Tribunals — making a claim under simple procedure
  17. nidirect — the small claims process (Northern Ireland)
  18. Buildings and construction (VAT Notice 708) — 2.1 Construction services: work to an existing building is normally standard-rated
  19. GOV.UK — VAT rates
  20. GOV.UK — Register for VAT: when to register