Please wait ...

How much does a loft conversion cost? 2021

Average Price
$20,000 - $60,000

How much does a Loft Conversion cost on average?

Looking to add value to your property with a loft conversion but confused about costs? We’ve put together a handy guide to give you a better idea of how much you’ll pay for different types of loft conversions, different property types, and much more!

What is a Loft Conversion?

A loft conversion is a process of transforming a loft (or attic space) to create additional space and rooms, adding value and usability to your property. Depending on the type of loft conversion you opt for, your contractor will either rebuild your roof to create more space or simply add a structure on top of your existing roof.

How much does a loft conversion cost?

Loft conversions come in all shapes and sizes, so the price can vary dramatically. To make it easier for you, here’s a rough idea of costs based on local US professionals: 

Average cost (in total)$20,000
Minimum cost (in total)$15,000
Maximum cost (in total) $60,000

A loft conversion is a big commitment, so before you go ahead with anything, it’s important to think about what would be the best option for your property type and budget. Here are some key price factors to consider: 

  • Loft conversion type

  • Property type 

  • Location

Loft conversion type 

The good thing about loft conversions is that there are different types to accommodate all budgets. It just depends on what you’re looking to achieve with your loft conversion and whether that is suitable for your budget. Let’s have a look at the different loft types and their average costs:

Type of loft conversionHighest average priceLowest average price
Dormer loft$52,000$12,000
Attic loft$49,000$60,000

Loft Conversion by property type 

Your property will also determine the price of your loft conversion. For example, homes built before the 1960s tend to have fewer roof trusses which makes them easier to convert and could reduce the price. Modern homes are more likely to have steel beams which are more difficult to work with. 

That being said, a loft conversion that is completed properly and in accordance with building regulations will add significant value to your property, so it’s well worth the investment.


Remember, prices are likely to bump up in larger cities such as New York. 

LocationMaximum costMinimum costAverage cost
Outside New York$49,000$12,000$30,500
Inside New York $60,000$40,000$50,000

Other factors to consider: 

  • Your property’s size and the available roof space

  • The spec of the finish and the choice of materials

  • Adding in a bathroom

What are the hidden costs that come with loft conversions? 

 If you’re wondering why your loft conversion quote is much higher than you’d thought it would be, it’s probably because you haven’t considered all the hidden costs. Cost for additional requirements like surveying, insulation, window installation, and interior jobs all add up. It’s important to discuss all potential fees with your contractor at the outset so that you’re crystal clear on costs. 

Getting a loft conversion - is it worth the cost? 

A loft conversion is a great way to add value and space to your home without having to pack up and move. Whether your family is growing or you’re looking for a new home office, there are endless benefits to getting a loft conversion. Make sure you go for a trusted, regulated company to get the work carried out, as they’ll ensure that the work is completed to a high-standard, ultimately adding more value to your home. 

Transform your loft by finding a Loft Conversion company on Bark. 

Get quotes from Loft Conversion Specialists near you

Find a Loft Conversion Specialist near you

The average rating for Bark Loft Conversion Specialists is 4.83, based on 50,568 reviews


based on 50,568 reviews