Converting a loft is one of the smartest ways to add value and space to a home, especially in cities like Bristol where maximising square footage is a priority.
Whether you’re adding an extra bedroom, home office, or simply improving your property’s functionality, selecting the right loft conversion company is essential. Bristol is home to many reputable specialists, but choosing one can be overwhelming.
To make your search easier, here is a comprehensive list of 12 trusted loft conversion companies in Bristol, backed by experience, craftsmanship, and positive client feedback.
Why Choose a Loft Conversion in Bristol?
Loft conversions in Bristol are increasingly popular due to rising property prices and the growing need for functional, flexible living spaces.
Instead of relocating, many homeowners are choosing to extend upwards and make use of their unused attic space.
Some benefits include:
- Increased property value often by 15-25% depending on location and design.
- Extra living space without extending the building footprint.
- More cost-effective than a full house extension.
- Can often be completed under permitted development rights.
From dormer to Velux and mansard conversions, Bristol homeowners have a variety of design options to suit their property’s layout and local planning regulations.
How to Choose the Best Loft Conversion Company in Bristol?
Selecting a reliable loft conversion company is crucial for a stress-free and high-quality build. Here are key factors to consider when comparing Bristol-based contractors:
- Experience with similar projects and conversion types.
- Knowledge of local planning permission and building regulations.
- Portfolio of completed work and client testimonials.
- Transparency in pricing and timelines.
- Design support, project management, and structural engineering services.
It’s recommended to gather at least three quotes and check if the company offers guarantees or insurance-backed warranties.
Top 12 Loft Conversion Companies in Bristol
1. CSW Loft Conversions
CSW Loft Conversions Ltd has over two decades of experience delivering expertly crafted loft conversions in Bristol. Their team offers a complete end-to-end service—from architectural planning to structural calculations, building regulations compliance, and project management.
As members of several prestigious trade organisations including The Federation of Master Builders and The Guild of Master Craftsmen, CSW Lofts guarantees high standards, reliability, and peace of mind.
What sets them apart is their full-service approach. Whether it’s a Velux, dormer, or hip to gable conversion, they manage every detail and provide fixed quotes within 7 days of consultation. Their fully insured service and glowing customer feedback further solidify their reputation.
“The team at CSW handled everything from planning to construction—with professionalism and ease. We didn’t have to worry about a thing, and the finished loft is even better than we imagined.”
— Mr & Mrs McCrindle, Bedminster
Why Choose CSW Loft Conversions?:
| Feature | Details |
| Years in Business | 20+ years |
| Services | Loft Conversions, Home Extensions, Joinery |
| Conversion Types | Velux, Dormer, Hip to Gable |
| Planning & Design | In-house architects and structural engineers |
| Certifications | FMB, Checkatrade, TrustMark, Guild of Master Craftsmen |
| Areas Covered | Bristol and surrounding areas |
| Free Consultation | Yes – call 0117 939 5130 |
| Customer Reviews | 65+ 5-star reviews on Google |
2. J Vincent Lofts
J Vincent Loft Conversions is known for its personal touch and long-standing reputation for quality. Founded by Joe Vincent, a master joiner with over 12 years of experience, the company has become a go-to choice for bespoke loft conversions in Bristol.
They offer all common loft types Velux, dormer, and hybrid designs—working closely with clients from design through completion. With access to skilled structural engineers and building control agents, every project is crafted with precision and care.
Joe personally manages each project, ensuring consistent communication, adherence to timelines, and exceptional finish. The business also welcomes prospective clients to view completed projects.
“Joe and his team were fantastic from start to finish. The craftsmanship and attention to detail were spot on, and we couldn’t be happier with our new space.”
— Paul, St Werburghs
Why Choose J Vincent Lofts?:
| Feature | Details |
| Years in Trade | 12+ years |
| Background | NVQ Level 3 Joinery, Grade I Listed Restorations |
| Conversion Types | Skylight/Velux, Dormer, Hip to Gable |
| Process | Consultation, Design, Engineering, Build |
| Site Access | Scaffold access to reduce home disruption |
| Design Customisation | Bespoke wardrobes and storage available |
| Area Covered | Greater Bristol |
| Planning Assistance | Included |
| Client Reviews | Highly recommended for craftsmanship & professionalism |
3. AMD Loft Conversions and Construction
AMD Loft Conversions and Construction is another top-tier name in the Bristol area. This company stands out by offering a combined architectural and construction service, simplifying the process for clients. With experience in a wide range of loft styles, AMD provides fully managed services, from concept to completion.
AMD is well-versed in handling planning permission and building regulation submissions, ensuring each loft conversion is fully compliant and delivered on time. Their team includes certified builders and project managers, ensuring high quality throughout.
“AMD managed our loft conversion with impressive organisation and communication. The result is a beautiful, functional space that blends perfectly with our home.”
— Katy S., Clifton
Why Choose AMD Loft Conversions?:
| Feature | Details |
| Services Offered | Design, Construction, Planning Management |
| Conversion Types | Velux, Dormer, Hip to Gable, Mansard |
| Additional Services | Extensions, Internal Renovations |
| Project Management | End-to-end with dedicated team |
| Planning Application | Handled internally |
| Key Strength | Design-Build Integration |
| Certifications | Gas Safe, NICEIC for electrical |
| Reputation | High-quality finish and clear timelines |
4. JBS Lofts
JBS Lofts Ltd provides expert loft conversions throughout Bristol, Bath, and surrounding areas. Their services are all-inclusive—from free consultations to post-build walkthroughs. With over 15 years of experience, they’ve become a trusted local name, particularly praised for efficiency, craftsmanship, and aftercare.
With a dedicated in-house team and committed site managers, JBS ensures projects run to schedule. Their transparent approach to pricing and open communication also sets them apart.
Each loft is designed with your home’s structure and your vision in mind. Whether you want a Velux loft, a dormer expansion, or a more ambitious hip to gable conversion, JBS manages every detail from scaffolding to final inspection.
“From the very first consultation to the last inspection, JBS made everything easy. Our loft conversion looks amazing, and the team was a pleasure to have around.”
— Ewen & Rebecca, Bath
Why Choose JBS Lofts?:
| Feature | Details |
| Years of Experience | 15+ years |
| Conversion Types | Velux, Dormer, Hip to Gable |
| Project Management | Dedicated manager per project |
| Additional Services | Joinery, bespoke wardrobes |
| Client Communication | Weekly updates, open pricing |
| Follow-up Care | 5-year workmanship guarantee |
| Reviews | Highly rated for professionalism |
| Coverage Area | Bristol, Bath, Weston-super-Mare, Yate |
5. Park Lofts Ltd
Park Lofts Ltd is a family-run business led by Lee Fry, who is personally involved in each loft conversion project from enquiry to completion.
With over a decade of exclusive experience in loft conversions in Bristol, Park Lofts has delivered hundreds of successful projects—ranging from small Velux installs to full hip to gable transformations.
What makes Park Lofts truly stand out is their loft-only focus, which has made them true specialists. Every team member is trained specifically for loft work, and every project is fully managed with transparent stage payments and no upfront costs.
Their conversion types include Dormer, Hip to Gable, and Velux loft conversions, allowing clients to choose the best style suited to their property and budget.
“Lee and the Park Lofts team were knowledgeable, friendly, and professional. The project was delivered on time with minimal disruption and great results.”
— Sam & Lucy, Fishponds
Why Choose Park Lofts?:
| Feature | Details |
| Years of Experience | 10+ years |
| Ownership | Family-run by Lee Fry |
| Project Approach | Direct involvement from owner, full management |
| Conversion Types | Velux, Dormer, Hip to Gable |
| Guarantees | 5-year guarantee on all conversions |
| Payment Structure | No upfront cost, stage-based payments |
| Expertise | Loft-only focus, high attention to detail |
| Area Covered | Greater Bristol |
6. Pro Loft Conversions Bristol
Pro Loft Conversions Bristol offers over 15 years of industry experience with a strong reputation for delivering high-end, custom-built loft conversions.
Their services are ideal for homeowners looking to maximise space with added functionality—whether it’s a dormer to fit an en-suite, a Velux for natural lighting, or a full hip to gable conversion to extend usable space.
They provide 100% bespoke design and construction services, backed by qualified professionals and full project management from concept to completion. Pro Loft Conversions is known for its tidy work, transparent pricing, and a 10-year workmanship guarantee.
“We’re thrilled with the results of our loft conversion. The Pro Loft team was clean, reliable, and extremely professional. The extra bedroom with ensuite is stunning.”
— Elizabeth A., Henleaze
Why Choose Pro Loft Conversions Bristol?:
| Feature | Details |
| Years of Experience | 15+ years |
| Design Style | Fully bespoke based on individual requirements |
| Conversion Types | Dormer, Velux, Hip to Gable, Mansard |
| Guarantee | 10-year workmanship guarantee |
| Key Strength | High attention to design details, local expertise |
| Planning Help | Full assistance with permissions and compliance |
| Customer Reviews | Exceptional ratings on Google |
| Area Covered | Bristol & surrounding areas |
7. MPK Conversions & Construction Limited
Founded in 1993, MPK Conversions & Construction brings over 25 years of local expertise in loft conversions, extensions, and roofing solutions across Bristol and Bath.
Led by Martin Knapp, the business is known for its end-to-end service—from initial consultation and architectural design to project completion.
MPK offers a wide variety of loft conversions in Bristol, including Velux, dormer, and hip to gable options, all managed with meticulous attention to detail. Their strength lies in combining structural expertise with outstanding customer service.
They maintain excellent relationships with local planning authorities and are affiliated with trusted bodies like TrustMark, FMB, Build Assure, and LABC.
“MPK made a potentially stressful process surprisingly smooth. The craftsmanship was excellent, and the site was always tidy. We highly recommend them.”
— Harry K., Redland
Why Choose MPK Conversions & Construction?:
| Feature | Details |
| Years of Experience | 25+ years |
| Founder | Martin Knapp – hands-on management approach |
| Conversion Types | Velux, Dormer, Hip to Gable |
| Additional Services | Extensions, roofing, garage conversions |
| Planning & Design | In-house architects & planning support |
| Structural Warranty | Structural guarantees on all projects |
| Industry Accreditation | TrustMark, FMB, Build Assure, LABC |
| Coverage Area | Bristol, Bath, South West England |
| Customer Praise | Noted for professionalism and craftsmanship |
8. Bristol City Loft Conversions
Bristol City Loft Conversions offers tailored and cost-effective loft solutions for homeowners looking to increase space without overspending. Known for its practical and straightforward approach, this company focuses on maximising space and enhancing property value while keeping within budget.
Their strength lies in their transparent pricing model, straightforward consultation process, and commitment to customer satisfaction. Whether it’s a Velux window installation, dormer expansion, or a more complex hip to gable conversion, the team ensures a smooth and efficient process from planning to completion.
Being based in Bristol, they understand local building regulations and planning permissions intimately, ensuring full compliance with council requirements.
“Affordable, efficient, and easy to deal with. Our loft was transformed into a bright, usable office space. Couldn’t be happier with the outcome.”
— Tom H., Knowle
Why Choose Bristol City Loft Conversions?:
| Feature | Details |
| Services | Loft Conversions, Velux, Dormer, Hip to Gable |
| Strength | Affordable solutions tailored to local homeowners |
| Consultation | Free on-site consultations |
| Compliance | Full planning and regulation support |
| Team | Local experts with excellent trade network |
| Area Served | Greater Bristol and suburbs |
| Value | Known for budget-conscious conversions without quality compromise |
| Customer Focus | Practical designs based on functional needs |
9. Bristol Loft Conversions Ltd
Bristol Loft Conversions Ltd provides a complete design-and-build service, guiding clients through the entire loft conversion journey. With a team of experienced architects, engineers, and builders, they offer in-depth consultation and customisation options based on the client’s needs and budget.
They work on a wide range of property types and specialise in converting underused loft spaces into stunning bedrooms, offices, or ensuite bathrooms. Their services include Velux roof light installations, rear dormer conversions, and hip to gable extensions.
A hallmark of this company is their dedication to quality assurance. From providing clear schedules and cost estimates to ensuring all works are fully compliant with building regulations, they ensure each project is executed with precision.
“They guided us through every step, from design to completion. Transparent pricing and excellent customer service. Would definitely recommend.”
— Nina & Jack, St George
Why Choose Bristol Loft Conversions Ltd?:
| Feature | Details |
| Years in Operation | 10+ years |
| Services | Design, Planning, Construction, Completion |
| Conversion Types | Velux, Dormer, Hip to Gable |
| Project Style | Design-and-build package with timeline tracking |
| Planning Application | Handled in-house |
| Compliance | Full building regs, structural calculations included |
| Focus | Residential properties in Bristol |
| Customer Approach | Transparent, reliable, and efficient service |
10. Hallett Construction
Hallett Construction is a specialist in structural home improvements and is particularly well-regarded for working with period properties and listed buildings. Their loft conversions in Bristol are completed to a high standard, preserving architectural integrity while introducing modern features.
With extensive experience in structural engineering and historic renovation, Hallett Construction is an ideal partner for more complex loft conversions. Their services extend beyond standard builds to include bespoke carpentry, timber frame construction, and refurbishments.
Clients often choose Hallett for their ability to blend old and new converting attic spaces while maintaining original features such as exposed beams, sash windows, and heritage roofing.
“We trusted Hallett Construction with our period home and they exceeded our expectations. The finish was beautiful, blending seamlessly with the original architecture.”
— Darren M., Cliftonwood
Why Choose Hallett Construction?:
| Feature | Details |
| Specialty | Structural work, listed buildings, complex properties |
| Conversion Types | Bespoke, Dormer, Velux, Custom builds |
| Craftsmanship | High attention to detail, heritage integration |
| Add-on Services | Extensions, timber frames, renovations |
| Ideal For | Older homes, conservation areas, architectural preservation |
| Approach | Consultative and highly personalised |
| Project Management | Tailored service with structural oversight |
| Area Served | Bristol and surrounding historic neighbourhoods |
11. Earthwise Construction
Earthwise Construction is Bristol’s go-to contractor for eco-friendly loft conversions. Known for its sustainable building practices, this company integrates renewable energy systems, recycled materials, and passive design into every project.
Whether you’re looking for a Velux-style light-filled space, a dormer expansion with sustainable insulation, or an entire energy-efficient attic suite, Earthwise brings a green ethos to every stage of the build.
The company is also committed to reducing waste and lowering the carbon footprint of each project. Their team of in-house eco-specialists and architects provides a detailed roadmap from initial design to completion, ensuring both environmental and energy-saving goals are met.
“Working with Earthwise was a breath of fresh air. We love our new eco-conscious loft and appreciate the sustainable approach they took throughout.”
— Zara & Liam, Montpelier
Why Choose Earthwise Construction?:
| Feature | Details |
| Specialty | Eco-friendly and sustainable conversions |
| Key Features | Natural insulation, energy efficiency, solar readiness |
| Conversion Types | Velux, Dormer, Eco-specific models |
| Project Management | In-house eco experts and architects |
| Compliance | Meets or exceeds building regulation standards |
| Certifications | Known for environmental building standards |
| Ideal Client | Environmentally-conscious homeowners |
| Reputation | Excellent feedback for green home improvements |
| Area Served | Bristol and nearby areas focused on sustainability |
12. Ionic Builds
Ionic Builds is a Bristol-based construction company known for delivering high-quality loft conversions with care, precision, and professionalism.
They are committed to making the construction process as non-intrusive as possible, maintaining a safe, tidy, and respectful work environment throughout each project.
With years of experience across residential and commercial building work, Ionic Builds provides fully managed services from the initial concept through to the final handover.
Whether you’re looking to restore an existing space, renovate your loft, or build something entirely new, they offer bespoke packages tailored to your specific needs.
Their three-step process Visualise, Design, Construct ensures clarity at every stage. From listening to your vision and offering expert advice, to creating thoughtful designs and delivering superior craftsmanship, Ionic Builds is a trusted partner for loft conversions in Bristol.
CORSOL made everything easy smooth communication, quality materials, and a team that really cared about doing the job right. Highly recommended.”
— Rebecca F., Southmead
Why Choose Ionic Builds?:
| Feature | Details |
| Services Offered | Loft Conversions, Renovations, Extensions |
| Process | Visualise → Design → Construct |
| Speciality | Bespoke construction with minimal disruption |
| Strengths | Fully managed service, professional site etiquette |
| Area Covered | Bristol and surrounding areas |
Comparison Table: Top 12 Loft Conversion Companies in Bristol
| Company Name | Years of Experience | Conversion Types Offered | Unique Selling Point | Guarantee | Ideal For |
| CSW Loft Conversions LTD | 20+ | Velux, Dormer, Hip to Gable | Full-service from design to completion, in-house architect | Fully Insured | Homeowners seeking seamless, managed experience |
| J Vincent Lofts | 12+ | Velux, Dormer | Master joinery background, bespoke design | On-request | Bespoke builds with traditional craftsmanship |
| AMD Loft Conversions | 15+ | Velux, Dormer, Hip to Gable, Mansard | Combined design-build service | Project-based | Design-conscious homeowners needing full support |
| JBS Lofts | 15+ | Velux, Dormer, Hip to Gable | Local team, dedicated site manager for each project | 5-Year Workmanship | Residents in Bristol & Bath wanting full service |
| Park Lofts Ltd | 10+ | Velux, Dormer, Hip to Gable | Loft-only specialists, no upfront costs | 5 Years | Those seeking trusted, focused loft experts |
| Pro Loft Conversions Bristol | 15+ | Velux, Dormer, Hip to Gable, Mansard | Fully bespoke designs, 10-year warranty | 10 Years | Families upgrading homes with tailored solutions |
| MPK Conversions & Construction | 25+ | Velux, Dormer, Hip to Gable | Extensive project management and local authority links | Structural Warranty | Large-scale or technically complex projects |
| Bristol City Loft Conversions | 10+ | Velux, Dormer, Hip to Gable | Affordable and practical designs | On-request | Budget-focused homeowners in Bristol |
| Bristol Loft Conversions Ltd | 10+ | Velux, Dormer, Hip to Gable | Complete design-build package with planning | On-request | Owners seeking clarity and full-service delivery |
| Hallett Construction | 15+ | Bespoke, Dormer, Velux | Experts in structural and period property renovation | On-request | Owners of listed or period properties |
| Earthwise Construction | 10+ | Velux, Dormer, Eco-focused designs | Sustainable and eco-conscious building methods | Project-based | Environmentally-aware homeowners |
| CORSOL Conversions | 10+ | Velux, Dormer, Hip to Gable | Reliable full-service with in-house planning support | On-request | Homeowners seeking clear, streamlined projects |
Average Loft Conversion Costs in Bristol
Below is a rough guide to what homeowners can expect to pay for a loft conversion in Bristol. Prices may vary based on design complexity, property size, and materials.
| Conversion Type | Estimated Cost Range | Description |
| Velux Loft Conversion | £18,000 – £25,000 | Ideal for properties with high roof space. |
| Dormer Loft Conversion | £30,000 – £45,000 | Adds headroom and usable floor space. |
| Hip to Gable Conversion | £40,000 – £55,000 | Common for end-terraced and semi-detached homes. |
| Mansard Conversion | £50,000 – £70,000 | Maximises space, suitable for urban areas. |
How to Planning Permission & Building Regulations?
In many cases, loft conversions in Bristol fall under permitted development, meaning you may not need full planning permission. However, you should still check with your local authority or hire a contractor who handles this process.
Key considerations:
- Building regulations approval is always required.
- Structural integrity, fire safety, insulation, and access must be considered.
- Party wall agreements may be needed for terraced or semi-detached homes.
Top loft conversion companies usually manage these details as part of their service package.
Final Thoughts
With dozens of reliable loft specialists across Bristol, choosing the right one comes down to your budget, property style, and the level of service required. The 12 companies listed above offer proven track records, experienced teams, and a commitment to quality.
Homeowners are encouraged to review portfolios, speak to previous clients, and ensure they are comfortable with the company’s process and communication before signing a contract.
For those looking to promote their renovation services or showcase completed projects online, partnering with a trusted digital marketing company in Bristol can make all the difference, helping you attract the right audience and grow your business effectively.
A well-executed loft conversion can completely transform your home adding not just space, but also long-term value.
FAQs About Loft Conversions in Bristol
What type of loft conversion adds the most value in Bristol?
Dormer and mansard conversions typically add the most value due to the extra space and usability they provide.
Do I need planning permission for a loft conversion in Bristol?
Most standard loft conversions fall under permitted development, but larger or more complex designs may require planning permission.
How long does a typical loft conversion project take?
On average, a loft conversion in Bristol takes between 6 to 10 weeks, depending on the type and complexity.
What is the average cost of a Velux loft conversion in Bristol?
Velux conversions in Bristol generally cost between £18,000 and £25,000, making them one of the more affordable options.
Can lofts be converted in listed buildings?
Yes, but you will need listed building consent and may face more restrictions. Choose a company experienced in working with heritage properties.
Are there eco-friendly loft conversion options in Bristol?
Yes, companies like Earthwise Construction specialise in sustainable builds using eco-friendly materials and insulation techniques.
How do I know if my loft is suitable for conversion?
A minimum head height of 2.2m is usually required. A professional surveyor or loft specialist can assess your loft’s suitability during a site visit.
