Home / Cost guides / How much does a loft conversion cost in Cheshire?
How much does a loft conversion cost in Cheshire?
In Cheshire, a loft still needs its own quote, while the Federation of Master Builders renovation guide of 5 June 2026 puts loft conversions at £30,000 to £70,000 by type [S7], and its loft guide of 3 September 2025 lists the type figures from £30,000 to £70,000 [S8]. Prices vary by the job and the location, and QuoteZila does not set prices.
Last reviewed:What a Cheshire loft quote is actually pricing
A Cheshire loft quote is the price of changing one particular roof and one particular landing. The pieces that usually move the total are the new floor, the stair, the roof alteration, insulation, windows, electrics, fire protection, plaster, and the fees for design and building control. Leave any of those out and you are looking at a different job. The Federation of Master Builders' renovation guide of 5 June 2026 says loft conversion costs range from £30,000 to £70,000 by type [S7], and its loft conversion cost guide of 3 September 2025 lists a rooflight conversion from £30,000, a dormer at £50,000, a hip-to-gable at £60,000 and a mansard at £70,000 [S8]. The September guide says those prices come from member firm Marken Lofts and depend on location, complexity and materials [S8]. They are not a Cheshire price. Prices vary by the job and the location, and QuoteZila does not set prices. Where a figure below is a planning limit or a tax threshold, it is labelled as that. Ask the council that covers the address. In much of the east of the county that is Cheshire East, and in the west it may be Cheshire West and Chester.
Planning limits, which are not a price list
The Planning Portal explains permitted development for enlarging the roof of a house in England, under Class B. It is not a price list, and it does not apply to a flat or to a building that contains a flat [S1]. The volume of the enlargement, including any earlier enlargement, must not exceed the original roof space by more than 40 cubic metres for a terraced house, or 50 cubic metres otherwise [S1]. The work must not go higher than the existing roof, and on the principal elevation that fronts a highway it must not extend beyond the existing roof slope [S1].
Materials have to be similar in appearance to the existing house [S1]. Side-facing windows must be obscure-glazed, and any opening part must be 1.7 metres above the floor of the room [S1]. The enlargement must not include a veranda, a balcony or a raised platform, and it must not include installing, altering or replacing a chimney, flue, or soil and vent pipe [S1]. The Planning Portal also says the original eaves are to be maintained or reinstated, the enlargement set back at least 20cm from the original eaves so far as practicable, and the new roof must not overhang the outer face of the original wall, with stated exceptions for hip-to-gable work and for a roof that joins an existing extension [S1].
Houses on Article 2(3) designated land are outside this route. The Planning Portal defines that land as a conservation area, an area of outstanding natural beauty, the Broads, a National Park, a World Heritage Site, or an area specified for the protection of natural beauty [S1]. A planning condition or an Article 4 direction can remove the right even on an ordinary street. Ask the council before you treat a sketch as permitted.
A dormer loft conversion is a different shape of roof from a rooflight dropped into the existing slope. Both still have to be counted against the same volume cap if they are enlargements [S1]. Price each roof shape on its own quote.
Building regulations, the stair and the floor
Planning permission and building regulations approval are different. You can be inside the volume cap and still need building regulations approval. The Planning Portal says approval is required to convert a loft or attic into a liveable space [S2]. It gives, as examples of what the regulations are applied to: the structural strength of the new floor, the stability of the structure including the existing roof, safe escape if there is a fire, safely designed stairs to the new floor, and reasonable sound insulation to the rooms below [S2].
The same page says the guidance is written for a house of no more than two storeys. An apartment, a maisonette, or a house over three storeys can need more extensive work [S2]. It also says you must find out whether the job falls within the Party Wall etc. Act 1996 [S2].
Storage is not automatically the small version of the same job. The Planning Portal says the ceiling joists in most homes were not designed to support a significant load, and that an excessive extra load from storage may take them past their design capacity [S2]. Laying flooring boards over those joists may mean you need to apply to a building control body [S2]. Making the loft more habitable, for example by installing a stair and lining the rafters, is likely to need more extensive work, and the regulations are likely to apply [S2]. A liveable space, in that wording, includes a spare bedroom that is only used sometimes [S2].
Do not decide from the hatch that the joists are strong enough. Do not cut roof timbers, move a water tank or open the slope yourself. The person who designs the floor and the person who checks it should be named in the quote. For the approval route, use the council's building control team or a registered building control approver.
GOV.UK: find your local council for building control. QuoteZila is not affiliated with this organisation.
Working at height
Converting a loft puts people on ladders, on scaffold, and sometimes on the roof. The Health and Safety Executive says work at height means work in any place where, if there were no precautions, a person could fall a distance liable to cause personal injury, and it gives a fall through a fragile roof as an example [S4]. It says work must be properly planned, supervised and carried out by people with the skills, knowledge and experience to do the job, and that the first step is to avoid work at height where that is reasonably practicable [S4].
That is written for employers and for people who control the work. It is still the right test when you are hiring. Ask how the crew will reach the eaves and the ridge, and whether the quote includes scaffold or a tower. Do not go out of the hatch onto the tiles, and do not strap a ladder from a description in a quote. Fragile roof coverings and old roof windows are a reason to keep the description in the quote, not a reason to climb up and look.
HSE: work at height. QuoteZila is not affiliated with this organisation.
Party walls in a terrace
GOV.UK says the Party Wall etc. Act 1996 is a framework for preventing and resolving disputes about party walls, boundary walls and excavations near neighbouring buildings [S3]. A party wall can be a wall that stands on the land of two owners and forms part of a building, or a wall on one owner's land that is used by two owners to separate their buildings [S3]. The Act covers work to an existing party wall or party structure, and excavation near to and below the foundation level of neighbouring buildings [S3]. The examples include cutting into a party wall [S3].
The Act is separate from planning permission and from building regulations approval [S3]. A loft that needs new steel bearing on a wall you share with next door is the moment to read that guidance. Where the Act applies, serve a party wall notice rather than relying on a conversation on the path. A rooflight on its own is not a reason to assume the Act applies. Find out, which is also what the Planning Portal tells you to do [S2].
What changes the quote
| Item | What we can say |
|---|---|
| Whole loft conversion in Cheshire | Depends on roof, stair, floor and whether the room is lived in |
| Rooflight kept inside the existing slope | Still an enlargement if it adds volume, and still a building-regulations job if the space is liveable [S1] [S2] |
| Dormer or hip-to-gable | Counts toward the 40 or 50 cubic metre cap, with a hip-to-gable exception on the eaves set-back [S1] |
| New stair | A liveable loft needs a safely designed stair [S2]. Where it lands takes space from the floor below |
| Strengthening the floor | Ceiling joists may not have been designed for storage or for a room [S2] |
| Scaffold and roof access | Work at height has to be planned by competent people [S4] |
| Design, calculations and building control | Approval is required for a liveable conversion [S2]. Fees vary by body |
| Electrics, heating and a bathroom | New circuits are a separate trade. A bathroom adds plumbing. Ask for each trade as its own line |
| VAT on the quote | A business must register when taxable turnover goes over £90,000 [S6] |
If a builder in Sandbach prices a dormer differently from a builder in Nantwich, that is not a county rate. It is two roofs. Compare the specifications, not the town names.
What to hand over before anyone prices it
Builders can only price the loft they can picture. Send the same pack to each one.
- A note of the house type: detached, semi-detached or terrace. The volume cap is different for a terrace [S1].
- Whether anyone has already altered the roof. Earlier enlargement counts toward the cap [S1].
- What you want to use the room for. Storage and a bedroom are different regulatory jobs [S2].
- Where a stair could land, and which room you would give up space in.
- Photos of the loft, the hatch, the landing and the outside of the roof. Take them from a place you can stand safely. Do not walk the slope to get a picture.
- The postcode, and whether the street has room for scaffold.
- Anything you already know about a shared wall with the neighbour.
Jobs you might post
These are examples, not taken from real job posts.
- "Terrace in Crewe. We want a bedroom in the loft. The hatch is over the landing. Please say whether the roof can take a dormer within the volume rules, where the stair would go, and include building control in the quote."
- "Detached house. Storage only, if the joists allow boards. We do not want a stair. Please say if building control still needs an application, and do not assume the ceiling can take boxes."
- "Semi-detached house in Cheshire. Rooflights rather than a dormer, if the planner agrees. Include scaffold, insulation and making good the landing. Electrics as a separate line."
How to read loft quotes against each other
| Line to look for | Why it changes the job | If the quote is silent |
|---|---|---|
| Liveable room or storage only | The Planning Portal treats them differently [S2] | Ask which one they have priced |
| Stair: going, headroom and which room it lands in | A safely designed stair is part of a liveable conversion [S2] | Ask for a sketch |
| What happens to the existing joists | They may not carry the new floor [S2] | Ask who is designing the floor |
| Roof shape and the volume they have assumed | The cap is 40 or 50 cubic metres, including earlier work [S1] | Ask them to state the volume |
| Windows, and obscure glazing on a side elevation | That is a permitted-development condition, not a style choice [S1] | Ask them to mark the elevation |
| Scaffold, rubbish and protection of the rooms below | Easy to leave out | Ask for each as its own line |
| Building control route and who submits | Approval is required for a liveable space [S2] | Ask whose name is on the application |
| Fixed total, and whether VAT is included | A quote is a fixed price and an estimate is a rough guess [S5]. Registration starts over £90,000 of taxable turnover [S6] | Ask for a fixed total that says if VAT is in it |
| Party wall | The Act is separate from the other two permissions [S3] | Ask them to say if they think it applies |
Citizens Advice says to get written quotes from at least three traders, and to be wary of a trader who will not write the quote down [S5]. A price far below the others may be a different specification, not a bargain [S5]. Some traders charge for quotes, so ask before a visit is booked [S5].
Questions to ask, and signs to pause
- Is this a fixed price for a liveable room, or for storage?
- Who designs the floor and the stair, and is that fee inside the total?
- How will you reach the roof, and is scaffold included?
- What volume of enlargement are you assuming, and does it include any older dormer [S1]?
- Will you speak to building control before the roof is opened [S2]?
- Does the wall you are bearing on belong to a neighbour as well as to us [S3]?
- What insurance do you hold? Citizens Advice says to ask to see the policies and to check they will not run out before the work finishes [S5].
- Is any guarantee insurance-backed, and is that in writing [S5]?
Pause if the only number is a single lump with no stair and no building control. Pause if someone offers to open the roof before the council has been asked. Pause if you are being nudged to pay the whole sum before materials arrive. Citizens Advice says not to agree a deposit above 25% where a deposit cannot be avoided, and to get a receipt [S5].
Official pages worth reading
QuoteZila is not affiliated with these organisations.
- Permitted development for roof enlargements: Planning Portal, loft conversion planning permission [S1].
- Building regulations for a liveable loft: Planning Portal [S2].
- Party walls: GOV.UK, Party Wall etc. Act 1996 [S3].
- Work at height: HSE introduction [S4].
- Quotes and deposits: Citizens Advice [S5].
- VAT registration: GOV.UK [S6].
This page is general information, not professional or legal advice. QuoteZila does not check Gas Safe, WaterSafe, NFRC, NICEIC or other registrations against the register on your behalf: look them up yourself.
Where this applies. The volume limits summarised here are the Planning Portal's account for houses in England. Scotland, Wales and Northern Ireland can differ. A flat, including a flat over a shop, is outside the householder route described above [S1]. If you are unsure which council covers the address, ask before you rely on the 40 and 50 cubic metre lines.
Get loft conversion quotes
Say whether you want a room to live in or storage, and name the town. Up to five matched local businesses can reply [QZ2]. QuoteZila is free for customers and local businesses [QZ1].
Honest status: QuoteZila is new. We're starting in Cheshire, beginning with Crewe, Nantwich and Sandbach, and growing area by area. Anyone in the UK can still post a job or register a business. How fast you get quotes depends on how many local businesses have joined near you. Businesses can register and receive jobs straight away. We don't check insurance, qualifications or registrations, so please check these yourself before you hire.
Posting a job is not open yet
The builders page covers wider structural work. Roofers are the trade for the covering itself. Electricians are the trade if the loft needs new circuits. See all services.
Questions about loft conversion quotes
How much does a loft conversion cost in Cheshire?
The Federation of Master Builders' renovation guide of 5 June 2026 says loft conversion costs range from £30,000 to £70,000 by type, and its loft guide of 3 September 2025 lists a rooflight conversion from £30,000, a dormer at £50,000, a hip-to-gable at £60,000 and a mansard at £70,000. The September guide says those prices come from member firm Marken Lofts and depend on location, complexity and materials. They are not a Cheshire price. Prices vary by the job and the location, and QuoteZila does not set prices. Compare written quotes that list the same stair, the same roof work and the same building-control route.
Do I need planning permission for a loft conversion?
Often a house loft can be enlarged without a planning application, if it stays inside the Planning Portal limits. Those include a volume cap of 40 cubic metres for a terraced house and 50 cubic metres otherwise, no rise above the existing roof, and no projection past the roof slope on the principal elevation that fronts a highway. Flats, and houses on Article 2(3) land, are outside that route. Ask the council about your own house.
Do loft conversions need building regulations approval?
Yes, if you are making a liveable space. The Planning Portal says building regulations approval is required to convert a loft or attic into a liveable space, covering floor strength, roof stability, escape if there is a fire, a safely designed stair and sound insulation. Boarding a loft only for storage can still need approval, because the ceiling joists may not have been designed for that load.
Is a loft ladder the same as a loft conversion stair?
No. The Planning Portal talks about a safely designed stair for a liveable loft, and it treats boarding for storage as a separate question. A pull-down ladder is not described there as the stair for a room you sleep in. If the room will be slept in, ask building control what stair they will accept before you compare prices.
Could the work involve a party wall?
It might, in a terrace or a semi-detached house. GOV.UK says the Party Wall etc. Act 1996 is separate from planning permission and from building regulations approval, and that a building owner who proposes work the Act covers must tell the adjoining owner in the way the Act sets down. Use a party wall notice where the Act applies, and ask before anyone cuts into a shared wall.
Should I pay a deposit before the loft work starts?
Citizens Advice says some traders charge for a quote, so ask before anyone visits. It also says to avoid a large upfront payment, to offer to buy materials yourself, and not to agree a deposit above 25% where you cannot avoid one. Get a receipt. A deposit is not the conversion price.
Does QuoteZila check the businesses that quote for a loft?
No. We don't check insurance, qualifications or registrations, so please check these yourself before you hire. You can report a quote or a business from your job page.
Can I post a loft conversion on QuoteZila?
Yes. Describe the house, the roof and whether you want storage or a room to live in, and add your Cheshire postcode. Up to five matched local businesses can send quotes. QuoteZila is free for customers and local businesses.
Related reading
- Roof repair cost: when the covering is the job, rather than a new room
- Electrician cost in Cheshire: for circuits that are not the builder's line
- Builders: who to ask for a loft that changes the structure
- All cost guides
Part of Cost guides. All services
Related trades
Cost guides
Related pages
- Loft Insulation: What Changes the Quote. What moves a loft insulation quote: what is up there now, loft size and access, boarding, ventilation at the eaves, cables and downlights. No price printed.
- Log Burner Installation Cost: What to Ask. What goes into a log burner installation quote in Cheshire: the stove, chimney or flue system, hearth, sign-off and smoke control rules, and how to compare.
Sources
- QZ1: QuoteZila product fact. QuoteZila pricing line.
- QZ2: QuoteZila product fact. QuoteZila FAQ How does getting quotes work?.
- S1: Planning permission: loft conversion, Planning Portal. Accessed 2026-10-27. https://www.planningportal.co.uk/permission/common-projects/loft-conversion/planning-permission/
- S2: Is building regulations approval needed for a loft conversion?, Planning Portal. Accessed 2026-10-27. https://www.planningportal.co.uk/permission/common-projects/loft-conversion/is-building-regulations-approval-needed-for-a-loft-conversion
- S3: Party Wall etc Act 1996 guidance, GOV.UK. Accessed 2026-10-27. https://www.gov.uk/guidance/party-wall-etc-act-1996-guidance
- S4: Introduction to working at height safely, Health and Safety Executive. Accessed 2026-10-27. https://www.hse.gov.uk/work-at-height/introduction.htm
- S5: Before you get work done on your home, Citizens Advice. Accessed 2026-10-27. https://www.citizensadvice.org.uk/consumer/getting-home-improvements-done/before-you-get-building-work-done/
- S6: When to register for VAT, GOV.UK. Accessed 2026-10-27. https://www.gov.uk/register-for-vat
- S7: How much does a house renovation cost?, Federation of Master Builders. Accessed 2026-10-30. https://www.fmb.org.uk/resource/how-much-does-a-house-renovation-cost.html
- S8: Loft conversion cost: a breakdown of costs, Federation of Master Builders. Accessed 2026-10-30. https://www.fmb.org.uk/resource/loft-conversion-cost-a-breakdown-of-costs.html