Loft Conversions In London

If you are looking for experts to carry out your loft conversion in London, give us a call now for a free quote! 

Why Choose Us For To Carry Out Your Loft Conversion?


Free no-obligation quotes from loft conversion specialists.


Many years of experience in the industry.


We always go above and beyond for our clients.


We hold full public liability insurance to work on your property.​

A completed loft conversion
A completed loft conversion

Loft Conversion Specialists in London

At Prospective Builders London, we pride ourselves on being the leading specialists in loft conversion in London and the surrounding areas. As having a loft conversion done is not a small task, you can rest assured knowing that you have a team of experts at your side throughout the entire process. From getting planning permission to the very final stage of completion, we have got you covered.

A loft conversion could be the difference for your family, from moving house to staying in the place and area you have built so many cherished memories. Our team is always ready to give you expert advice on how you should do your loft conversion, we are always open to answering your questions and concerns throughout the process.

We will surpass your expectations as we are the most friendly and skilled team out there! We differ from the competition because we’re determined to collaborate with you to create a loft conversion that will help transform your house into the home of your dreams and is both truly unique and reasonably priced. Call us today at 0203-488-9800 for a free quote.
A loft from the outside

How Much Does Loft Conversion Cost in London?

Loft Conversion costs differ from one home to another, it depends on the work you want to do, whether you want Roof light, Velux conversion, Dormer conversion, Hip-to-Gable conversion, Mansard conversion, Bungalow Roof extension, Shell loft extension, Pre-sab/Modular extension.

The average estimated cost for Roof Light or Velux in London starts from £20,000 to £49,000. If you’re considering the Dormer loft conversion in London, the average cost £30,000 to £69,000. Moving to the Hip-to-Gable conversion, it varies between  £40,000 to £70,000. For Mansard loft conversion, average costs start from £45,000 to £75,000. Regarding Extensions, Bungalow Roof extension starts from £35,000 to £60,000. The Shell Loft extension starts from £12,500 and the Pre-fab/Modular extension starts from £50,000.

Cost-Effective Loft Conversions

If you are considering having loft conversions but you are feeling concerned about the prices, no worries, our Loft Conversion service sets new standards in the market as we are the most flexible company when it comes to the cost of loft conversion. As we believe that every customer should be given the highest quality of services, we ensure that all of our clients get an outstanding experience, from the very moment they call us, to the moment we leave their door house. At Prospective Builders, 95% of our customers were happy with the provided costs for the loft conversions. We guarantee you a magnificent experience that is cost-effective. Call us today at 0203-488-9800 for a free quote.
A beautiful loft

Why Should You Do A Loft Conversion In London?

One of the main benefits of a having a loft conversion is – it adds more value to your home. You can easily add up a maximum of 20% to 25% to your home value and this is likely to be achieved if you create a perfect bedroom in the attic. You can add up to £100,000 to the value of your home by just loft conversion as per previous studies.

Converting an attic into a space that you could live in is a cheaper option than moving homes. In addition, it is an investment for the house if you ever considered selling or renting it in the future.

Some Benefits Of Loft Conversions

  • Immensely increases the value of your home.
  • Expands the living space in your home.
  • Creates extra bedroom if needed.
  • Fast and Easy Process.
  • No need to move for extra space.
Loft windows

Get Your Loft Conversion Done Efficiently And Professionally!

Our team consists of passionate-professional builders who have been in the building industry for decades. Doing Loft Conversions is a piece of cake for us. Rest assured that your conversion will be carried out quickly and to the highest standard.

Once you let us know how you want the loft to be structured, we will begin by getting all of the necessary drawings ready so we can be completely certain that the building work will be carried out exactly as you imagined!

We will provide you a full breakdown including all the details of how much the loft conversion will cost and the duration that it will take once we have finished viewing the house.

Loft Conversions In London Carried Out By The Experts

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Let Us Carry Out Your Loft Conversion To The Highest Standard

Our expert team has extensive experience in creating amazing living spaces and transforming unused attic space into something special. We create stunning, elegant, and modern masterpieces from your ideas and bring them to life.

We carry out all types of loft conversions including Dormer, Hip to Gable, Mansard, Velux, L Shaped, Bungalow and flat loft conversions.

We work across London and surrounding areas, constructing places our customers can be proud to call their own. If you are looking for London’s loft conversion specialists,  Prospective Builders has you covered. Call us today at 0203-488-9800 for a free quote.

Looking for a Loft Conversion in London?

GET YOUR home transformed!

Loft Conversion FAQs

Find the answers to common questions we are asked​

Using the quote form on the contact us page or give us a call on 0203 488 9800

We deliver a very high standard of work at an affordable price. We will give you a non-obligation quote after your consultation. 

Yes, all our staff are fully insured. 

Yes, we have public liability insurance up to £2,000,000.

We cover the whole of London and surrounding areas.

One of the reasons our customers love us is that we work in all kinds of homes, it doesn’t matter if you have a traditional build, new builds, flats, bungalows, terraced houses, or semi-detached – we can do it all!

Absolutely! We provide you with a comprehensive quote to provide you with the best price for the job as we believe in 100% transparency and ensure that you are informed and fully satisfied with all of the details.

After a brief consultation with you, we will provide you with an estimated duration of how long the job will take to complete.

Loft Conversion FAQs

Yes, a loft conversion can add an extra value of 20%-25% to your home.

This question is hard to answer without seeing the loft or knowing what kind of loft conversion you want to do. Once we see the loft and know your desired conversion, we will then be able to inform you about the estimated duration to get the work done. On average, Loft Conversions may take up to 8 weeks.

To ensure customer satisfaction, we try our best to finish before the given estimated time, however, if anything shows up during the process we will be happy to update you with the current status of the job.

This depends on your project, and we will give you time estimates as part of your consultation.

We aim to leave the job site cleaner than when we arrived. Of course building work may cause a mess. We dispose of all garbage and ensure that all rubbish has a place to go. Anything that can be recycled will be kept orderly and consistently dropped off at a recycling station. All worksites will be left in a tidy manner once a project is done.

Not only are we the best loft conversion specialists in London, we are also the tidiest!

You will have access to our mobile phone numbers. All our builders are incredibly friendly and easy to work with.

Yes, you can live in the house while we are doing the work for you. Our team works hard and quickly to lessen the suffering that you might go through during this period.

Adhering to timelines is one of the most important aspects of our job. When we estimate a project we always include a timeline that is reasonable and attainable. Any unforeseen delays will be brought to your attention immediately so we are always on the same page.

The number of rooms added to the loft depends on several factors; your loft type and loft size. If your loft is big enough then potentially several rooms can be added.

Not to worry, our experts will kindly let you know about the possible work that we can build in your loft.

Adding a bathroom to support the bedroom in the attic is a great idea that you should consider if you have enough space. The estimated cost of adding a bathroom to an attic is £10,000.

Dormer Loft Conversion is classified as the best and most popular loft conversion type.

No, you don’t need to remove the carpets from the grounds. Upon our arrival, we bring plenty of dustsheets, polythene sheeting, and tape to ensure that all of your carpets and other items are protected.

If you are looking to turn the attic into a living-space room, the attic room needs to be at least a height of 7.2 feet. However, most houses have a decent space on the roof that it could be converted into a storage attic.

The prices of loft conversion stairs differ from one to another. If you are looking for a basic-style staircase, it costs an average of £1,300, if you decided to go for custom-built stairs, it will cost you around £7,000. According to spiral staircases, they range from £2,400 to £9,200.

We are considered one of the top-leading companies in the market as we have a professional team who specialize in all kinds of loft conversions to ensure that every customer we deal with gets the highest quality of work possible.