How to Choose a Loft Conversion Company

What a full-service loft converter should handle

A loft conversion touches the structure of the house, the fire safety of the whole home and usually the neighbours. A capable company manages all of it or clearly tells you what it does not cover.

Survey and measurement of head height, roof structure and stair position · Drawings, structural calculations and a planning or permitted development route · Building regulations application and inspections through to completion certificate · Party wall notices where the conversion affects a shared wall · Steelwork, floor joists, dormer or roof alterations and insulation · Staircase, fire doors and smoke detection to protect the escape route · Electrics, plumbing for any en-suite, plastering and finishing

Questions to ask every company

These questions quickly separate thorough converters from the rest.

Have you measured the head height, and what conversion type does it allow? · Is the staircase position resolved, and how much headroom will it have? · Is building control included, and who is the inspector? · Are party wall costs included or excluded? · Who is on site day to day, and who manages the job? · What does the price exclude, such as decoration, flooring or roof repairs?

Comparing quotes like for like

Two loft quotes can differ widely because one includes an en-suite, a larger dormer or full decoration and the other does not. Line them up item by item: structure, dormer or roof work, windows, stairs, insulation, electrics, plumbing, plastering, fire safety, building control and finishes. The guide on what an extension quote should include applies almost word for word to lofts.

The loft conversion cost guides on this site publish typical ranges, which are useful for checking whether a quote is in the right territory before comparing detail.

Warning signs

A few signals suggest a company may not be the right fit.

A price given without anyone looking in the loft · No mention of building control or fire safety · Vague answers on the staircase and head height · Pressure to pay a large deposit before drawings or approvals · Reluctance to put the scope in writing

How payments and changes should work

A clear payment schedule tied to stages of work, such as structure complete, roof weathertight, first fix and completion, protects both sides. It means money follows progress rather than running ahead of it.

Changes happen on most loft jobs once the space opens up, for example moving a rooflight or adding storage in the eaves. Agree at the start how variations will be priced and confirmed in writing before the work is done, so the final account holds no surprises.

Local knowledge and practical fit

A company that regularly works in your area will be familiar with the local housing stock, typical roof forms and how the council approaches dormers and roof alterations. It also means someone can reach the site quickly if a question comes up. Ask to see finished work of a similar type and size to yours, and speak to the person who will actually manage the job.

Mighty Oak Construction is based in Tunbridge Wells and carries out loft conversions as part of its building work; the loft conversions service page explains its approach.

Frequently asked questions

What should a loft conversion quote include?

Structure, dormer or roof work, windows, stairs, insulation, electrics, plumbing, plastering, fire safety, building control, party wall matters where relevant, and a clear list of exclusions.

Do loft conversion companies handle planning and building control?

A full-service company should, or should say clearly which parts are left to you. Building regulations approval is needed for every loft conversion.

How do I compare loft conversion quotes?

Line them up item by item rather than by total, and check what each excludes, such as decoration, flooring or an en-suite.

Is it worth using a specialist loft converter?

What matters is experience with the conversion type your roof needs and clear responsibility for the whole job, whether the company only does lofts or offers wider building work.