Loft Conversion Costs: guide costs For different Types Of Loft Conversions

Loft Conversion Costs

Guide Costs For Common Types Of Loft Conversions

The first question 67% of all clients have when they ring in, is to ask what a loft conversion costs to build. That is exactly the right question to ask, because without having an good estimate on what a loft conversion costs, you won’t be in a position to budget for it, or to know how much to remortgage to release the funds to pay for it.

Annoyingly, loft companies don’t tell you costs upfront and insist on sending a sale rep out meet you before giving away costs, and then the hard sell starts. We do not do that here.

Real Architects = Real Loft Conversion Costs

Our in-house RIBA architectural practice understands that the housing stock in London and the home counties doesn’t vary so much. In fact, a majority of housing stock is one of these five types, and we know exactly what a loft conversion on them costs to build.

1960-70’s Planned-Estate House

Conversion type: Rear dormer

Starting from £38,000 

1980’s Planned-Estate House

Conversion type: Rear dormer

Starting from £40,000 

1930’s Semi-Detached House

Conversion type: Hip to gable

Starting from £45,000 

Victorian Terraced House

Conversion type: Rear dormer

Starting from £42,000 

Victorian End Terraced House

Conversion type: L-section

Starting from £50,000 

Modern Post 2002 Detached House

Conversion type: Roofline

Starting from £48,000 

Converted Flats And Maisonettes

Conversion type: Inset rear dormer

Starting from £40,000 

Purpose-Built Flats And Maisonettes

Conversion type: Inset rear dormer

Starting from £42,000

Find Your Style Of Home

Every loft conversion needs a set of approved plans in place before you start building, but for now, identify the property type most like yours, and contact us to see what you need to cost for your loft conversion.

Contact Us

Telephone 020 8898 8299

Office address:

12 High Street, Hampton Wick, Kingston upon Thames, KT1 4DB

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City Lofts LondonWide Limited. Registered in England and Wales.

Company number 11454709. VAT number 299773521



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Warning! We get that we’re not for everyone. Please only complete this form if you value superior craftsmanship over speed and quality over price. If you do, your expert loft team awaits..



We take huge pride in what we do here at City Lofts London. Not only do we just provide more space for our clients, but we provide the opportunity for our clients to do so much more with their home. We won’t leave until we know we’ve done a fantastic job. However don’t just take our word for it, here is what/projects/ our clients have said.

“City Lofts took time to really understand my circumstances and I appreciated that. The extra value they give you is just incredible, and they were worth every penny.

Hon L.

May 2014

“My parents are in the North & I wanted somewhere they could come and stay whenever they wanted. Now they have their own room and bathroom which is great. City Lofts did a magnificent job.”

Adam & Deborah

June 2013

“The guys were just brilliant; very tidy and refreshingly polite. For me this was essential as I live on a private riverside estate. I will be using them again.”

Bella M.

Feb 2012

“We had always wanted to do a project like this. It is fair to say they made our dream come true.”
Brent & Jane T.

Aug 2014

“Getting planning permission around here is difficult so I was glad the City Lofts Architect led the process successfully. The team was organised and friendly and the finished loft was flawless. ”

Dr. Singh

May 2017

“City Lofts were extremely professional and very systematic in how they went about building. The whole process went like clockwork.”

Simon M.

May 2015

“I live miles away from the site and work long hours in the City so I wasn’t able to visit the job regularly. So to say I was impressed with how they kept me apprised throughout via email is an understatement. They did a magnificent job and did so whilst my tenant was still living there. I couldn’t ask for more than that.”
Tim D.

July 2015

“Fantastic creativity mixed with professionalism and a real joy to work with. Rare in the building world I imagine! I would highly recommend City Lofts to anyone thinking about it.”
Nick N.

Sept 2014

“The work was amazing and I have recommended them to all my friends.  I was heavily pregnant at the time with by second, and living at home whilst the work was being done. They were incredibly considerate towards my situation and that meant a lot.”
Alexandra J.

Oct 2014

“They were a breath of fresh air. Really glad I found builders I like and get on with professionally and personally. Worth every penny and I’ve already recommended them to others”
Chris P.

Apr 2015

“No matter what request we had, Kuly was always there for us.  He was always there for us and that meant everything”
Vandana & Pratul N.

Jan 2016

“Thoroughly friendly and extraordinarily knowledgeable. Thank you guys, thank you Deepak!”
Faye H.

Nov 2016

See lots more testimonials that happy home owners have left on our Houzz profile, on our Which? Trusted page and on our Facebook page. We would be happy to get you in touch with any of our clients directly so you can ask them 121 about their loft conversion.


Download our free ebook and understand the top 13 mistakes homeowners make when completing a loft conversion


We’ve published our guide on the 13 biggest mistakes made by home owners when building a loft conversion. Read our free book on how to avoid these common mistakes.

For a Free Quote Get In Touch With City Lofts Today

Enquire today for a free ebook on getting your dream loft conversion. Alternatively you can call us directly on 020 8898 8299.
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