At The Loft Conversion Company (Portsmouth) Ltd, we understand every client has different priorities. Some want a fully managed, stress-free experience, while others prefer to reduce costs or take a more hands-on role. That’s why we offer 3 flexible ways to work with us.
Our Premium, Fully Managed & Complete Turn-Key Loft Conversion Solution
Option 1 offers a complete, end-to-end loft conversion solution, with The Loft Conversion Company (Portsmouth) Ltd taking full responsibility for every stage of the project. From the initial feasibility survey and bespoke architectural design to planning approvals, Building Regulations compliance, structural calculations, and final construction, we manage the entire process in-house. All payments for the project are made directly to us, simplifying administration and ensuring full transparency. Our fully qualified team of trades carries out all work, guaranteeing high-quality workmanship, strict safety standards, and a seamless experience.
This option is chosen by the majority of our clients who want a stress-free experience with the fastest build timeframe.
What’s Included?
✔ Free Feasibility Survey
✔ Architectural Design Package
✔ Full Structural Engineering
✔ Planning Permission Application (if required)
✔ Building Regulations Compliance
✔ Party Wall Guidance (if required)
•Full specification of materials and finishes
•Structural calculations included
•Steelwork design
•Load assessment & compliance checks
✔ Complete Project Management & Construction
•Main Contractor Contract
•Every trade covered — all coordinated by us
•Carpentry
•Staircase
•Roofing
•Plumbing & Heating
•Electrical Installation
•Insulation & Fire Protection
•Plastering
•Windows
•Waste Management
•Final Decoration (optional add-on)
•We manage all deliveries, scheduling and quality control
•Regular client updates & site supervision
•Fastest completion time — no gaps waiting for trades
✔ Building Control Approval
•All inspections organised by us
•Full sign-off certification issued at completion
Guarantees & Protection
✔ 10-Year Workmanship Guarantee
✔ Fully insured (including £5m public liability cover)
✔ VAT invoiced clearly and correctly
✔ Health & Safety managed
✔ Trusted reputation with excellent Checkatrade score
Who is Option 1 ideal for?
Clients who want:
✔Minimal disruption to family life
✔ A much faster build time
✔ A clearly defined programme with start and completion dates
✔ A single responsible contractor from start to finish
✔ Maximum build quality and accountability
✔ Value peace of mind, backed by our 10-year workmanship guarantee and full compliance with Building Regulations.
✔ All payments handled directly through one company for simplicity and transparency.
This is the most efficient and most popular delivery method.
Client-Led Build With Professional Design & Consultancy
You manage the trades and we manage the project, achieving an average saving of around 25% compared with Option 1.
Option 2 provides a highly cost-effective way to achieve your loft conversion while still benefiting from our professional design expertise and project oversight. Under this option, The Loft Conversion Company (Portsmouth) Ltd does not carry out any physical building work or supply materials. Instead, you appoint and pay your own tradespeople directly, giving you greater control over costs. Our in-house build team used in Option 1 is not available under Option 2, but we can assist in helping you select suitable contractors if needed. All work must be carried out by your appointed trades, and you will also handle payments for materials directly with trusted suppliers. We act solely as your consultant and project coordinator, monitoring quality, compliance, and progress throughout the build to ensure the work meets professional standards.
This option is ideal for clients looking to significantly reduce build costs and who are comfortable taking a more hands-on approach to managing their project. It is particularly suitable for those with their own trade skills, or who have trusted friends or family in the trades. As well as enthusiastic and capable DIYers who wish to complete parts of the work themselves. It requires patience, good organisation, and clear communication with multiple trades throughout the project.
What’s Included?
✔ Free Feasibility Survey
✔ Architectural Design Package
✔ Full Structural Engineering
✔ Planning Permission Application (if required)
✔ Building Regulations Compliance
✔ Party Wall Guidance (if required)
•Full specification of materials and finishes
•Structural calculations included
•Steelwork design
•Load assessment & compliance checks
✔ Project Consultancy & Oversight
We prepare a detailed build schedule
Advise on the order of works and specification
Check workmanship meets regulations & approved plans
Attend site at key stages (frequency agreed in advance)
Communicate directly with trades as your appointed consultant
Cost Savings
✔ You pay trades directly
✔ You avoid main contractor overheads & profit
✔ Some trades may not be VAT registered
You can typically achieve around 25% saving on the total cost compared with Option 1
Timeframe Consideration
Due to multiple trades managing their own workloads build durations are usually significantly longer (sometimes up to double the length of Option 1). There may be gaps between phases while waiting for trades availability.
Guarantees & Client Responsibilities
Under this option guarantees are provided by the individual trades, not by us. You are the main contractor in legal terms. You must ensure Building Control inspections are booked — we will assist with guidance
✔ We ensure all trades appointed hold valid insurance
✔ We provide a consultancy agreement and schedule so everyone understands their role
Who is Option 2 ideal for?
✔ Budget-conscious clients
✔ Clients with a trade qualification or skilled DIYers who may carry out some of the work themselves
✔ Have friends or family members who are skilled tradespeople that can assist with elements of the build
✔ Clients who are happy with a slower build to save money
Hybrid – Design, Build Support & Contractor Coordination. Project delivered by one of our trusted partnered companies or your chosen Contractor
By using a trusted partnered contractor or your chosen builder under our oversight, clients typically achieve an average saving of around 15% compared with Option 1.
With Option 3, The Loft Conversion Company (Portsmouth) Ltd manages the full design, planning, and approval process for your loft conversion. You then have the flexibility to choose who carries out the construction, either one of our trusted partnered contractors or a contractor you already know. If you choose your own contractor, a consultancy fee is applied for our professional oversight. Throughout the project, we continue to monitor progress, ensuring that all work complies with our designs, Building Regulations, and quality standards. Our in-house team from Option 1 cannot be used for Option 3. Please note: If you are comfortable allowing your chosen builder to complete the work independently, that is absolutely fine, in this case, we only charge for the design, drawings, and planning stages.
What’s Included?
✔ Free Feasibility Survey
✔ Architectural Design Package
✔ Full Structural Engineering
✔ Planning Permission Application (if required)
✔ Building Regulations Compliance
✔ Party Wall Guidance (if required)
•Full specification of materials and finishes
•Structural calculations included
•Steelwork design
•Load assessment & compliance checks
Our Role Throughout
✔ Ongoing involvement to check build quality
✔ Managing any changes and approvals
✔ Single point of contact for you — we stay responsible for the design (if we provided the plans)
✔ Peace of mind knowing the contractor is vetted and experienced
✔ What You Get
✔ A full loft conversion carried out by a specialist experienced team
✔ We remain involved to ensure your design is delivered correctly
✔ You benefit from our network, experience and oversight
Guarantees & Protection
✔ 10-Year Workmanship Guarantee
✔ Fully insured (including £5m public liability cover)
✔ VAT invoiced clearly and correctly
✔ Health & safety managed
✔ Trusted reputation with excellent Checkatrade score
Who is Option 3 ideal for?
Option 3 is perfect for homeowners who want the expertise and reassurance of The Loft Conversion Company (Portsmouth) Ltd while having flexibility in choosing the builder. It suits clients who:
✔ Want cost savings, typically around 15% less than Option 1 by appointing one of our trusted partners
✔ Prefer flexibility in selecting the contractor while still benefiting from professional oversight
✔ Wish to use a builder they already know but are inexperienced with loft conversions
✔ Clients who have a builder in mind but don’t know them, with our team overseeing the work to ensure quality and compliance
✔ Value having a single point of contact for design, planning, and project coordination
✔ Desire peace of mind knowing the loft conversion is monitored, fully compliant with Building Regulations, and delivered to our professional standards
This option balances cost efficiency, flexibility, and expert management, ensuring your loft conversion is completed safely, correctly, and to your satisfaction, even when using a builder unfamiliar to us.
Before any loft conversion begins, we carry out a free feasibility survey to assess what’s achievable within your roof space and to recommend the best design approach for your home. During this visit, we’ll also explain our 3 build options, outlining the benefits, timescales and budget considerations of each. We will then provide detailed quotations for all 3 options, so you can choose the route that best suits your needs.
To arrange your survey, simply head over to our Contact Us page and submit your details and our team will take care of the rest.
If you already have architectural drawings and Building Regulations approval, we can liaise directly with your architect to obtain everything required. Just let us know your preference, and we’ll ensure the process is handled smoothly and efficiently from the very start.
At The Loft Conversion Company (Portsmouth) Ltd, we provide flexible solutions tailored to how you want your project to run. Whether you choose Option 1 —Our Premium, Fully Managed & Complete Turn-Key Loft Conversion Solution, Option 2 — Client-Led Build With Professional Design & Consultancy, or Option 3 — Hybrid – Design, Build Support & Contractor Coordination, you will always benefit from our architectural expertise, detailed drawings, guidance, compliance support, and quality assurance. All loft conversions designed by us are backed by a 10-year guarantee for complete peace of mind. We also invite you to explore our case studies, expert insights, and a wide range of innovative product options via our brochures.
We take great pride in our workmanship and our commitment to delivering loft conversions that enhance homes and lifestyles. When selecting Option 1, your build will be carried out by our highly skilled, fully qualified in-house team, including carpenters, roofers, electricians, plumbers, and plasterers, who work seamlessly together to deliver the highest standards from start to finish.
If you choose Option 2 or Option 3, where the construction is carried out by either your chosen contractors or our trusted partnered contractors, we remain actively involved throughout the project, providing design support, compliance checks, scheduling guidance, and professional oversight to ensure everything progresses safely, smoothly, and to the high standards your home deserves.
We proudly serve Portsmouth and the surrounding areas, providing a reliable and professional service from the first sketch to the completed loft, no matter which option you select.
Our website features a diverse portfolio of completed loft conversions, showcasing an exciting range of design styles, practical layouts and creative uses of space. Whether you’re drawn to modern open-plan living, elegant master suites with en-suites, cosy bedrooms for growing families, or fully functional home offices, our projects highlight just how much potential is hidden above your ceiling.
Each conversion we deliver is tailored to the unique character of the property and the individual needs of the homeowner, from sleek rear dormers to charming pitched roof designs and inspiring bungalow transformations. These real-life examples offer a fantastic insight into what can be achieved, helping you visualise how your own loft could be transformed into a beautiful and valuable part of your home.
Explore our Video and Previous Projects pages to discover how we turn underused lofts into stunning living spaces that enhance both lifestyle and property value.
A loft conversion is one of the most rewarding ways to transform your home, turning unused, empty roof space into a beautifully designed and fully functional new living area. Whether you’re dreaming of a luxurious master bedroom with an en-suite, a bright and inspiring home office, a peaceful guest room, or a fun and practical playroom for the family, your loft holds incredible potential just waiting to be realised.
Unlike the stress, disruption and cost of selling your home and moving to a larger property, a loft conversion allows you to create the extra space you need while staying right where you are, close to your neighbours, schools, and the community you love. It is widely considered one of the most cost-effective home improvement projects, delivering a strong return on investment by significantly increasing the value of your property.
With minimal impact on your existing rooms and living arrangements, a well-designed loft conversion can add up to 30% more usable floor space in a house and up to 50% in a bungalow, with clever layouts maximising every inch for comfort, practicality and style.
Whether you prefer a contemporary aesthetic, something more traditional, or a design tailored around challenging roof shapes, our expert team will guide you every step of the way, ensuring your new loft space is safe, compliant, energy-efficient and beautifully finished.
A loft conversion isn’t just an upgrade, it’s a smart investment in the way you live and enjoy your home. Unlock your home’s true potential and create space with purpose.
A loft conversion is one of the smartest, most cost-effective ways to expand your home, without the stress, expense, and upheaval of moving. By transforming unused attic space into a bright and functional room, you can gain the extra bedroom, home office, nursery, or guest suite your family needs, while significantly increasing the value of your property.
With over 25 years specialising exclusively in loft conversions across Portsmouth and the surrounding areas, we provide the knowledge, design expertise, and support needed to ensure your project is a success. Space is particularly limited in Portsmouth’s dense urban neighbourhoods, making a loft conversion the ideal solution for growing families wanting to stay in the area they love.
A recent study by property experts shows that over half of homeowners now find moving financially unrealistic, and instead choose to invest in improving and enlarging their current home. The cost of a loft conversion is often outweighed by the value it adds, with an additional bedroom known to boost property value by around 20–35% depending on the home and location.
Your loft is a blank canvas, and when professionally designed and well-executed, it can become one of the best rooms in your entire home. The right layout, lighting, storage, and finishing touches ensure it not only enhances your lifestyle, but also appeals strongly to future buyers.
We offer three flexible build options to suit different budgets and levels of involvement:
Option 1 — Full Design & Build: We manage everything from concept to completion
Option 2 — Client-Led Build with Consultancy: You appoint trades; we guide and oversee
Option 3 — Hybrid Build Support: You choose whether we or your contractor carries out the build and we guide
Every loft conversion begins with a free feasibility survey, where we assess suitability, discuss your ideas, and explain potential layouts. If suitable, we provide a detailed, transparent quotation and begin producing architectural drawings to bring your vision to life.
From first survey to finished loft, whichever option you choose, you’ll benefit from our expertise, clear communication, and commitment to exceptional workmanship.
When planning a loft conversion, there are four main design types to consider. Each provides different benefits depending on the space available, your budget, and whether planning permission is required.
1️⃣ Velux (Roof Window) Loft Conversion
A Velux conversion is the simplest and most cost-effective option. Roof windows are installed flush with the existing roofline, keeping the appearance of your home largely unchanged. Because it doesn’t significantly alter the roof structure, this type of loft conversion usually doesn’t require planning permission. It works best when the loft already has good head height.
2️⃣ Dormer Loft Conversion
A dormer loft conversion extends vertically from the roof to create additional floor space and a full-height room with standard windows. This option is ideal if you want a more spacious bedroom, office, or en-suite. Rear dormers are commonly approved under permitted development; however, front dormers almost always require planning permission. Pitched-roof dormers are generally preferred by councils over flat-roof designs.
3️⃣ Hip-to-Gable Loft Conversion
Often called a gable wall conversion, this design extends the sloping side of a hip-roof up to create a full vertical gable wall. This increases usable space dramatically and allows the staircase to be positioned more comfortably. It’s a popular choice for semi-detached and end-of-terrace homes where the existing roof shape is restricting head height.
4️⃣ Mansard Loft Conversion
A Mansard conversion provides the largest transformation, significantly altering the roof structure to create a new full-height room spanning the width of the house. This type of roof design blends well in areas where neighbouring properties already have similar roof shapes. Because of the extensive structural changes involved, Mansard conversions require planning permission and are more common in urban areas like London.
A loft conversion can bring you many benefits. A popular option if you’re looking to add extra space or value to your home. Here are some of the benefits a new loft conversion can bring:
A new loft conversion can bring you many benefits, from increased living space and natural light to added value and improved energy efficiency. It is a smart investment that can improve your quality of life and make your home more attractive to potential buyers.
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