Loft Conversions St Albans

Transform Your Loft Space
By Building Up

Do you need an extra room in your family home?

We are St Albans leading loft conversion experts

Struggling To Find A Reliable Builder For Your Loft Conversion?

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13+ Years of experience building home extensions.

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More than 90% of our work comes from recommendations.

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Why Choose Us
For Loft Conversions in St Albans?

When it comes to loft conversions in St Albans, C J Smiths emerges as the leading choice. Our extensive experience in the industry is coupled with a skilled team making us the choice for trusted builders in St Albans.

This ensures personalised designs that perfectly align with clients’ visions. C J Smiths has a commitment to top-quality workmanship and efficient project management. Coupled with the utmost client satisfaction, this makes us stand out in a very competitive industry.

Affordable pricing plans further enhance our appeal. We aim to make loft conversions accessible to every homeowner in St Albans. C J Smiths has an impressive portfolio of completed conversions plus we’ve helped clients navigate their planning concerns. Our incredible reputation and genuine customer testimonials speak for themselves. For your home loft conversion project, choose C J Smiths and experience the difference.


Loft Conversion

Benefits Of A Loft Conversion

If you’re seeking ways to enhance your living space without the inconvenience of moving, consider a loft conversion. These additions can boost your property’s value and also create valuable extra rooms for your personal needs.


Planning Permission Advice

We can help you with your application and the process of securing permission.

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We offer custom payment plans to suit your budget and needs.


Complete Project Management

We will manage your home extension from start to finish, ensuring it runs smoothly.



We aim to ensure you are pleased with your new home extension.




Types Of Loft Conversions We Offer

Rear Dormer Conversion

This conversion is a popular type of loft conversion. It involves extending the existing roof to create extra space with vertical walls and a flat or sloping roof. This process allows for more usable floor space and improved headroom in the loft area. It makes a valuable addition to a property and the perfect master bedroom and also an en-suite master bathroom.

Dormer conversions are a popular choice amongst our customers. It is because of their versatility in design and the potential to enhance both the functionality and value of a home.

Mansard Conversion

A mansard conversion is an attractive loft conversion style. It involves altering the roof structure to create ample space within the loft area. The distinctive design features two slopes on each side, with the lower slope nearly vertical. This unique approach ensures generous headroom and significantly expands the usable floor space. Mansard conversions are popular for their elegant appearance. They offer valuable living space to a property, making them a sought-after choice for our St Albans customers.

L-Shaped Dormer Conversion

An L-shaped dormer conversion is a clever loft extension. It cleverly combines two dormer windows to form an L-shaped configuration. This thoughtfully designed layout ensures abundant space in the attic. It offers extra headroom and a generously sized area for various potential uses. L-shaped dormer conversions are favoured for their ability to create versatile and roomy living areas. Its makes them a popular choice among St Albans homeowners seeking to maximize their loft space.

Hip to Gable Conversion

A hip-to-gable conversion is an intelligent loft extension. It transforms the sloping side roof (hip) of a property into a vertical wall (gable). This alteration expands the loft space, providing room for extra living areas or more bedrooms. Homeowners with hipped roofs favour hip-to-gable conversions. It's because of their practicality and ability to create valuable space. It makes them an ideal solution to enhance living areas without compromising on style.

Velux Conversion

A Velux conversion is a brilliant loft transformation. It incorporates roof windows, often from the Velux brand, into an existing loft space. These windows are skillfully installed within the roof slope, infusing the room with natural light. Velux conversions are admired for their budget-friendliness. It's their non-intrusive installation and ability to create an inviting living space which makes them a popular choice. This comes without extensive changes to the roof's structure. This particular type is one of C J Smiths most popular choices for a St Albans loft conversion!

Piggyback Conversion

A Piggyback conversion is a creative loft extension. It's a technique that involves constructing an extra loft space on top of an existing one. This unique approach utilizes the current loft's roof structure as a foundation for the new space. Piggyback conversions are popular for their ability to maximize space. They can be built without altering the property's overall footprint. This makes them a cost-effective and practical choice. This clever method allows homeowners to add extra living areas or bedrooms. Maintaining the existing roofline ensures a seamless and harmonious exterior appearance.

Pitch Dormer Conversion

A Pitched dormer conversion is a captivating loft extension. Its style showcases a sloping roof dormer. This type of dormer blends gracefully with the property's main roof, as it shares the same pitched angle. Homeowners favour Pitched dormer loft conversions. It's for their ability to add both headroom and floor space to the loft area, resulting in a more spacious and practical living environment. Its seamless integration with the existing roofline makes it an appealing choice amongst our many customers in St Albans!

Side Dormer Conversion 

A side dormer conversion is an appealing loft extension that elegantly extends from the side of the property's roof. This dormer style provides valuable more headroom and floor space within the loft area. It makes it a preferred choice for homeowners seeking to optimize their loft's potential and add an extra bedroom. Side dormer conversions are admired for their flexible design options. The ability to create functional living spaces is the main attraction. They often enhance the property's exterior. This is achieved by introducing a charming architectural element to the side elevation, adding both practicality and aesthetic appeal to the home.



How Much Does A Loft Conversions Cost?

Opting for a loft conversion can prove more cost-effective than relocating to a larger home. This is especially true if you have a fond attachment to your current property in St Albans.

Prices are influenced by various factors, such as size, complexity, and design. On average, dormer, hip-to-gable, and Velux loft conversions are priced per square meter.

loft conversion costs can range from £1500-£2500 per square meter. As you can see how this becomes an appealing choice over moving home. A visit to your property would be essential to provide you with a precise quote.

Loft Conversions


Loft Conversion Designs That Inspire You

We are the leading experts in loft conversions. To see our gallery and gather some inspiration. Please see our Projects page.

London Colney Dormer Loft Conversion

Our customer needed more space for their growing family, we planned and created a loft extension to fulfil that need. The old roof was taken off, new structural steels were put in for support. a full timber frame was built and new roof tiles were installed. The loft conversion added an extra bedroom to the house and a lovely modern on trend bathroom.


Client Testimony

What Our Clients Say About Us?

Feel free to read more about what our previous clients have said about us designing and building their vision.

HK Buono
HK Buono
Had my garden renovation nicely done. Staff are attentive, sincere, efficient and knowledgeable. Able to answer to all my doubts and give constructive advice when facing contingent issues. They also clean up the place at the end of the project, no follow up cleaning needed. One good builder with integrity, knowledge, expertise and efficiency. Will definitely call them up for my next project. Highly recommended.
Deepak Anand
Deepak Anand
Assigning Craig to manage our life long dream of creating a big kitchen/living room (90sqm) was one of the best decisions we ever made. We got in touch with Craig 1 year in advance of works commencing and from the get go Craig scheduled an initial meeting to discuss our plans. Leaving the meeting Craig gave us new ideas and put no pressure on signing and was happy to work around us. Having visited several existing projects and received great customer feedback, we knew Craig was the builder for us as the quality of work was just exemplary. Craig saved us 5K by urging us to allow him to project manage the build and true to his word, he was on onsite multiple times per day, making sure everything was perfect. Along the way, we did encounter some problems, due to the existing condition of the garden but Craig always had a plan to work around them and not change designs with little or no change in cost. Craigs team are highly skilled, clean and respectful. They always tidied and locked up at the end of each day which left us worry free. One great trait about Craig; he treats his jobs like his own home and if he’s not happy with it, the project does not move to the next stage. It is no wonder he is respected in St Albans as a 5star builder. We will 100% be onboarding Craig again to do our 2nd story and driveway in the future. A big thankyou to Craig and his excellent team.
Hannah Franco
Hannah Franco
Craig and his guys did some work in our garden for us and completely transformed it. We couldn’t be happier with the quality of work. The guys working for Craig were polite, punctual and respectful. I will be going back to Craig for our next house project.
Siddika Walji
Siddika Walji
Thanks Craig for creating a beautiful outbuilding at the back of our garden. It looks stunning!
Rebecca Hopkins
Rebecca Hopkins
In the last couple of years we have used CJ Smiths to build us a house from scratch and also to completely renovate and extend our current home. We have been absolutely delighted with the service we have received and have recommended CJ Smiths to many friends and family. Craig and all of his team are professional, friendly and trustworthy and my family have always been pleased to have them working in our home. They are extremely tidy and mindful when working in a home with children, so we’ve never had to worry about any sharp edges/power tools being left around for little people to find! We have also never had to worry about builder’s bad language around the kids as they are all family men and are a pleasure to have around. The jobs have always been finished to a high standard and Craig is completely transparent when it comes to timings, costs, payment schedules and any delays that might crop up due to unforeseen circumstances like weather etc. The team works quickly and efficiently and you will actually miss them when they’re gone!!! Especially Terry the chippie who is completely wonderful and will even make a fuss of your dog and let it out for you if you need him to! 100% recommend CJ Smiths to anyone!
Natalie Atkins
Natalie Atkins
We have used Craig and his team for 3 home-renovation projects now, the last of which being July 2022 - we are looking forward to the team completing a 2-storey side extension for us later this year. - Trustworthy This is number one for us. They do what they say when they say they will do it and at the price agreed. Additional costs were extras added on / changed by us during the project. - Friendly Craig and his team have all been friendly and a pleasure to have in the property. They are polite and respectful and we are comfortable with them (especially as we have young children around). - Tidy The team tidy up at the end of each day and leave tools safely out the way. - Quality Work completed by Craig, his team & contractors has been to a high standard and where there has been a snag list, minor issues have been addressed promptly. -Communication Craig is available to us throughout each project by WhatsApp or phone. It helps having a central person to coordinate with all parties.
Robert Quinn
Robert Quinn
Highly recommended… We recently used CJ Smiths for an extension and full house renovation. From the first meeting, to completing the project, we found Craig and his team absolutely faultless. The project was on time but for unavoidable weather delays. There were also no surprises from a budget perspective. Anything that required an “extra” or a design change was met with a pragmatic response and always a mutually agreeable way of resolving - refreshing in a world where most things are viewed as a problem. Nothing was too much hassle for the CJ Smiths team, who always went above and beyond to ensure we were kept informed of every small change or decision that needed to be made. We even mildly miss the busy house when everyone was on site. A huge thank you to the entire CJ Smiths team - we are delighted with the end result and would highly recommend them to anyone embarking on a renovation.
Philip Tam
Philip Tam
CJ Smiths is a great choice for anyone looking for quality workmanship and friendly service. They pay attention to every detail and deliver excellent results. Their prices are also very reasonable for the value they provide. I was very satisfied with their work and would highly recommend them to anyone. CJ Smiths is the best in the business! 👍🏼
dale Anthony
dale Anthony
Great service - very reliable friendly builders! We had our garden room built in St Albans by Cjsmiths, we found that the level of advice and service was a cut above the builders we have used in the past. During the planning phase, they answered all of our concerns and together we were able to plan and create the perfect space we wanted. The team were very polite and respectful during the build, cleaning up the site daily and treating our home and garden like it was their own! We are incredibly happy with the final result, it was completed on time and to a very high standard. We highly recommend Cjsmiths to anyone looking for builders in St Albans! Thanks
Ryan Smith
Ryan Smith
Outstanding job! Craig and his team completed an loft conversion for us at the beginning of this year and we couldn't be happier. We were so impressed by his level of professionalism from the very start. He managed our expectations and gave us a realistic timeline for the loft conversion to be completed, which ended up being very close to his estimate. We highly recommend C J Smiths for anyone looking for a loft conversion or building work in general. We will definitely be using C J Smiths again in the future. Great job!
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Frequently Asked Questions About Loft Conversions

If you have any questions that are not covered in the FAQ section, please don’t hesitate to send us an email. We are always ready to help you out!

A: A loft conversion transforms an unused loft space into a functional living area, often with added windows, insulation, and flooring. It creates extra rooms, such as bedrooms, offices, or playrooms. A loft conversion space can ultimately be created to suit your needs or requirements. 

A: In most cases, loft conversions are covered by permitted development rights, potentially exempting them from planning permission. However, verifying with the local planning authority is essential to ensure compliance.

A: The duration varies depending on the project’s complexity and loft size, usually taking about 6 to 10 weeks on average. Feel free to contact us for a more accurate estimate and time frame on your next project. 

A: Loft conversion costs vary based on factors like type, size, materials, and location, ranging from £20,000 to £50,000 or more. Feel free to contact us for more info and a detailed guaranteed quote.

A: Absolutely! A professionally built loft conversion significantly boosts property value by introducing extra functional living space, elevating its appeal to potential buyers or tenants. The added usability and versatility make the property more attractive, positively impacting its market value and desirability in the local community.

A: Certainly! Lofts with limited headroom or shallow pitches are still suitable for conversions with clever solutions like a dormer or Velux conversion. These innovative approaches maximize available space and provide extra head space, offering you the opportunity to transform your underutilized loft into a functional and appealing living area.

A. Common types include dormer, Velux, hip to gable, mansard, and L-shaped dormer. The best choice of a loft conversion depends on the roof structure and requirements. Also bear in mind planning regulations for location. 

A. Do your due diligence, research local companies, read reviews, and seek recommendations. Look for experienced professionals with certifications. Most of all, use a loft conversion company who has previous experience in the type of loft conversion which you choose to go ahead with. Our projects page showcases our previous work so take a look and be sure to get inspired! 

A. Loft conversions must meet safety and building regulations, including fire safety, insulation, structure, and electrical installations. A building inspector must sign off all loft rooms.

A. Assessing the existing roof’s integrity and identifying obstacles early can prevent delays and ensure a successful conversion. Consider a structural survey if needed before any work has began. A reputable builder can guide you through this process.

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