Question 1

What’s the average cost of a loft conversion in [Location]?

Accepted Answer

It varies, but the [Location] average is around __[pricing[1].[Location].[Loft Conversion Building].[averagePriceFormatted]]__. Velux conversions typically cost less than dormer conversions.

Question 2

Which lofts can't be converted?

Accepted Answer

Lofts with very low headroom, certain trussed roofs, or limited access might not be suitable. You’ll usually need at least 2.2m height.

Question 3

What’s the cheapest type of loft conversion?

Accepted Answer

Velux (rooflight) conversions are the most affordable, with minimal structural changes.

Question 4

What’s a shell loft conversion?

Accepted Answer

A ‘shell only’ conversion includes the structure, windows, and roof work; you finish the rest of the work, such as electrics, flooring, and bathroom work, yourself.

Question 5

Do I need planning permission?

Accepted Answer

Often not. Many loft conversions fall under permitted development, but check if your home is listed, in a conservation area, or if you're altering the roof shape.

Question 6

What are the 4 year and 10 year rules?

Accepted Answer

These relate to how long unauthorised work has existed, but don’t rely on them to sidestep planning. Speak to your local authority.

Question 7

Is it illegal to sell a house with a loft conversion but no building regs?

Accepted Answer

Not illegal, but it can cause legal and mortgage problems. Always ask for completion certificates or regularisation paperwork.

Question 8

How much does it cost to add a staircase to a loft?

Accepted Answer

Installing a loft ladder in [Location] costs around __[pricing[2].[Location].[Loft Ladder Installer].[lowPriceFormatted]]__ - __[pricing[2].[Location].[Loft Ladder Installer].[highPriceFormatted]]__ depending on style, size, and structure.

Question 9

How much does a Velux loft conversion cost in [location]?

Accepted Answer

Prices vary depending on size and finishes. Use our [Job Value Estimator tool](https://www.checkatrade.com/blog/job-estimate-calculator/) for a bespoke cost estimate, or [use our search tool](https://www.checkatrade.com/) to find and compare quotes from Velux loft companies covering your local area.

Question 10

Do loft rooms need windows?

Accepted Answer

Yes. Building regs require proper ventilation and escape routes, usually through roof windows.

Question 11

Can you do a loft conversion for £10k?

Accepted Answer

It’s unlikely. Be wary of too-good-to-be-true quotes. Use our [Job Value Estimator tool](https://www.checkatrade.com/blog/job-estimate-calculator/) for a bespoke cost estimate for your loft conversion project. Or, [use our search tool](https://www.checkatrade.com/) to find and compare quotes from velux loft companies covering your local area.

Question 12

What’s the difference between a dormer and a Velux loft conversion?

Accepted Answer

A __Velux__ conversion uses roof windows to add light and ventilation without changing the shape of your roof, it’s quick, affordable, and ideal if you already have good head height.

A __Dormer__ conversion extends out from the roof to create more usable floor space and headroom; it’s pricier, but adds more value and flexibility.

Question 13

How much does a hip-to-gable loft conversion cost in [Location]?

Accepted Answer

In [Location], your price will depend on roof structure, size, finishes, and access. Use our [Job Value Estimator tool](https://www.checkatrade.com/blog/job-estimate-calculator/) for a bespoke cost estimate, or [use our search tool](https://www.checkatrade.com/) to find and compare quotes from hip-to-gable loft conversion companies covering your local area.

Question 14

Is it worth converting my loft?

Accepted Answer

Yes; if your loft has enough head height and structure, it can be one of the most cost-effective ways to add space and value. You could gain an extra bedroom or home office and boost your home’s value by up to 20% in some areas.

Always weigh up cost vs benefit, especially if you’re planning to sell in the near future.

Question 15

Can I convert my loft without planning permission?

Accepted Answer

Often yes; many loft conversions in [Location] fall under permitted development, especially Velux and rear dormers.

__You’ll likely need planning permission if:__

1. You live in a listed building or conservation area
2. You’re altering the roof shape
3. The conversion extends beyond permitted size limits

Check with your local planning authority to be sure.

Question 16

What happens if my loft conversion wasn’t signed off?

Accepted Answer

If your loft conversion doesn’t have building regulation approval, it could cause issues when selling, remortgaging, or insuring your home.

Options include:

- Applying for retrospective sign-off (known as a regularisation certificate)
- Providing an indemnity policy to buyers if selling

Always ask your local authority or solicitor for advice.

Question 17

How do I find the best loft conversion company in [Location]?

Accepted Answer

Look for a company that:

- Has passed Checkatrade’s 12 checks
- Shares reviews, project photos and case studies
- Is happy to explain the process and quote clearly
- Has experience with the type of conversion you want (e.g. dormer, bungalow, Velux)

Use Checkatrade to [search loft conversion companies in [Location]](https://www.checkatrade.com/) and compare reviews to find the right one for your project.

Loft Conversions in Sidcup (149)

Describe your job

Describe your job

E&e Loft London Ltd

Services & skills

Shield Contractors Ltd

Services & skills

AX Builders Ltd

Services & skills

One City Maintenance Limited

Services & skills

SAM DESIGN & BUILD LTD

Services & skills

Let’s bring luxury limited

Services & skills

All Seasons Roofing and Construction Ltd

Services & skills

C&I BUILD LTD

Services & skills

Step and Co

Services & skills

Robinson Construction Surrey Ltd

Services & skills

Onyx Building And Landscaping Ltd

Services & skills

Kanat Building Services

Services & skills