Looking for a loft conversion architect in London? At Trimble Architects, our expert team offers complete loft conversion services including planning, design, and construction. We are based in Twickenham and help homeowners all across South London including Kingston Upon Thames, Teddington, Hounslow, Richmond, and beyond
Whether you're aiming to add extra space, an en suite bathroom or an extra bedroom, our loft conversion specialists are ready to help. Contact us today to begin your loft conversion project with one of the most trusted loft conversion architects in the area.
Loft Conversion Architecture, Design & Planning Specialists
If you're searching for trusted London architects to guide your loft conversion project, Trimble Architects is the right choice. We offer expert architectural services and full project management, helping homeowners across Greater London transform attic space into beautiful living space.
Our residential architects have years of experience creating innovative solutions tailored to your property and lifestyle. From initial concept to final design, we provide expert advice to make the most of your loft space, ensuring your home gains value and functionality.
Our architectural design and planning services cover all types of loft conversions. We support you through the whole process - from design process to approval process - and ensure your build process meets planning permission and building regulations.
Bespoke Loft Conversions in Architect London
Our expert team offers bespoke loft conversion services across London and the home counties. We’ve completed many loft conversions in architect London homes, tailored to suit each client's lifestyle and space needs.
A flat roof dormer is the most popular type of loft extension, offering extra space and more natural light. This style of loft conversion fits many terraced houses and can include roof lights or even a roof terrace for added functionality.
The design process includes checking your existing structure, preparing architectural drawings, and managing planning applications. Once approved, the build process begins. Every stage is managed by expert conversion architects, ensuring your project is completed with quality and care.
Our expert architects will guide you from planning permission to the construction phase. Whether you’re adding a new space for your growing family or simply adding space to increase value, a loft conversion is a smart and cost-effective home improvement.
Types of Lofts
At Trimble Architects, we specialise in all types of loft conversions, including dormer, mansard, hip to gable, L-shaped, and Velux styles. Each type of loft is suited to different properties and offers a unique way to add living space and increase your home’s value.
Our expert team guides you through the full loft conversion project - from the first step to completion. We begin with a detailed survey and design process, focusing on your needs and the existing structure of your property. We prepare plans, help with planning permission, and manage the build process from start to end.
Our conversion architects ensure your loft conversion design suits your house and lifestyle. Whether you need an extra bedroom, a quiet study, or a relaxing space for family, we deliver quality, comfort, and added value. A loft conversion is ideal for homeowners wanting to create more space without moving.
All work follows building regulations and planning rules. You may not require planning permission if your loft fits within permitted development rights, but our team checks every case carefully. We manage the whole process, keeping things simple and stress-free for our clients.
Dormer Loft Conversions
Dormer loft conversions are one of the most popular and cost-effective ways to increase space in your home. This type of loft conversion creates extra head height and adds a flat roof structure to the rear or side of your loft space, giving more room and light.
Dormers are especially suited to terraced houses and are often allowed under permitted development. These loft extensions are perfect for adding a new bedroom, an en suite bathroom, or a small home office. A dormer roof light or windows can bring natural light into your loft space.
This type of loft conversion requires planning permission in some cases. Our conversion architects will manage your planning applications, ensuring you meet all local regulations and building requirements. Our loft conversion services include architectural design, project management, and expert advice at every stage.
Our loft conversion specialists have transformed thousands of properties across North London, Greater London and beyond. From planning process to construction phase, we guide you through your entire loft conversion project.
There are different types of dormers available, depending on your house style. We help determine the best design for your property, and whether you need full planning permission or if permitted development rights apply.
Mansard Loft Conversions
A mansard loft conversion is one of the best ways to add extra space to your property. These loft extensions involve changing the roof to create a near-vertical wall, offering plenty of room and flexibility. They are often used to build an extra bedroom, bathroom, or even a roof terrace.
The mansard style is named after architect François Mansart and is ideal for terraced houses, detached homes, and Victorian properties in places like Camden, Islington, and Hackney. A mansard loft conversion usually requires full planning permission due to the structural changes involved.
Mansard conversions offer new space while keeping the look and style of your home. Our loft conversion architect team provides expert guidance and manages the full project. From architectural design to planning permission, our project management ensures everything runs smoothly.
We consider local regulations, your budget, and your property type when designing a mansard loft. Our builders ensure the structure meets all building regulations, and we tailor the layout to include features like an en suite bathroom or roof light for natural lighting.
A double mansard or L-shaped mansard can offer even more space for your growing family. Our expert team helps determine the best layout for your loft, whether you're looking to increase value or improve your lifestyle with a modern, spacious home extension.
Hip To Gable Loft Conversions
A hip to gable loft conversion is a smart choice for homes with a sloping or hipped roof, often found on semi-detached or end-of-terraced houses. This type of loft conversion creates more loft space by straightening one side of the roof, allowing for extra bedroom space or a larger bathroom.
Our expert architects at Trimble Architects help guide you through the entire loft conversion project. From the initial concept to completion, we ensure your hip to gable conversion meets building regulations and fits your home perfectly.
This loft extension style increases head height and can often be completed under permitted development rights, though full planning permission may be required depending on your area, especially in a conservation area. We support you through the approval process, including all planning applications and local regulations.
Hip to gable loft conversions are ideal for adding space without the stress of moving. They offer a cost effective way to increase the value of your home while improving functionality. Whether you're in North London or Greater London, our conversion architects deliver high-quality design and project management to suit your home and lifestyle.
Our expert team also works closely with builders to ensure a smooth construction phase. By managing the whole process, we help homeowners achieve their dream living space on time and within budget.
L-shaped Loft Conversions
An L-shaped loft conversion is one of the best ways to maximise your attic space and improve your property. It’s especially suited to Edwardian or Victorian terraced houses with an existing rear extension.
This type of loft extension forms an L shape by connecting two dormers, giving you the option to create multiple rooms. It’s a great choice if you want an extra bedroom, en suite bathroom, or home office. Our loft conversion specialists can tailor the design to fit your needs, making the best use of the available loft space.
L-shaped loft conversions usually require planning permission, and our expert team will handle the full planning process, including submitting applications and managing any local regulations. We assess the feasibility of each project, ensuring the design suits your house and meets all requirements.
Our architectural design team provides detailed plans, helping you visualise the final design and make the most of your space. With support at every stage—from concept to construction phase - we ensure a smooth and successful loft conversion project.
From increasing value to improving your lifestyle, this type of loft conversion delivers great results. We’re proud to offer expert advice and personalised project management for all L-shaped loft conversions in North London and across the city.
Velux Loft Conversions
Velux loft conversions are among the most popular types of loft for homeowners who want to create extra space without changing the existing structure of their roof. Also known as roof light loft conversions, these are a simple and cost effective way to enhance your home.
Our conversion architects recommend this option for homes where the attic space already has good head height. Velux conversions involve adding roof windows or skylights to bring in natural light without the need for major building work.
These loft conversions usually do not require planning permission as they fall under permitted development. However, if your property is in a conservation area, different rules may apply. Our expert team will guide you through the approval process and make sure your project meets all planning and building regulations.
Velux loft conversions are ideal for North London homes where maintaining the original roof structure is important. This style of conversion is less disruptive, quick to build, and works well for those needing a quiet study, a spare bedroom, or a peaceful reading room.
With careful interior design and attention to detail, we help you create a bright and functional loft space. Our project management covers everything from the first step to completion, giving you confidence and peace of mind throughout your loft conversion project.
Loft Conversion Architects Near Me
If you’re searching for a loft conversion architect in London, our expert team at Trimble Architects is ready to help. We provide loft conversion services across Greater London, including North London areas like Camden, Hackney, and Islington.
Our conversion architects offer everything from loft conversion design and planning permission support to complete project management. Whether you want an extra bedroom, more space for a growing family, or a new home office, we tailor every loft conversion to suit your needs.
Get in touch with us at 020 8538 9303 to discuss your loft conversion project. Our London loft conversions are trusted by homeowners across the city. Let us help you make the most of your property with a high-quality, cost-effective loft extension.
CAN I CONVERT My LOFT OR ATTIC SPACE?
Yes, most loft conversions can be completed without full planning permission. Under permitted development rights, many loft extensions are allowed if they follow the local regulations and meet certain conditions. However, if you live in a conservation area or a block of flats, you may require planning permission.
If you're unsure whether you require planning permission, our expert team can advise you. We'll help you check if your loft conversion fits within the rules and guide you through the whole process. We also help with submitting planning applications when full planning permission is needed.
The permitted development limit is 40m³ for terraced houses and 50m³ for semi-detached or detached properties. The loft extension must not go higher than the existing roof and must not include a roof terrace or balcony unless approved.
Attic space must be checked for height. If your loft is under 2.2 metres, you may need to lower the ceiling of the floor below to meet the head height requirement. Our builders follow building regulations for staircases, fire safety, sound insulation, and structural strength.
You’ll also need a safe and well-designed staircase to access the new loft space. Our loft conversion architects plan for safety, lighting, and functionality. Skylights or roof lights can help bring in natural light, and interior design can improve the finished room.
Whether you plan to use your loft for a playroom, en suite bathroom, or extra bedroom, our expert architects make sure your project is safe, legal, and ready to build. If you're planning your first loft conversion or making changes to a previous one, we offer clear advice and support to help you get started.
What's the Cost of Loft Conversion?
The cost of a loft conversion can range between £20,000 and £60,000. Every loft conversion project is different, and the total price depends on your house type, the kind of loft extension you choose, your location, and whether you need planning permission.
Our expert team will work within your budget and provide clear advice from the first step. We’ll help you determine the best design and layout, keeping your needs and expectations in mind. If full planning permission is required, we manage the planning applications and approval process on your behalf.
Planning application fees vary. In England, a typical application costs around £202, while in Wales it may be about £230. Some applications, like those for listed buildings or properties in conservation areas, may not have a fee.
Our loft conversion architects aim to offer cost-effective solutions that deliver great value. We provide detailed quotes, expert planning, and efficient project management to ensure your build process runs smoothly from design to completion.
Do I need Planning Permission for Loft Conversion?
Under Permitted Development, homeowners can usually extend their loft without filing a planning application.
Our team of experts can guide you through the process and ensure that your loft conversion complies with Permitted Development standards.
If certain restrictions and requirements are fulfilled, a loft conversion for your home is deemed authorised for development and does not require permitted development rights.
A party wall agreement is a legal agreement provided by any neighbours who may be impacted by your loft agreement or other improvements. The Party Wall Act of 1996 governs this and gives building owners rights that go beyond common law.
Will a Loft Conversion Add Property Value?
Yes, a loft conversion is one of the best ways to increase the value of your property. According to studies, converting your loft can raise your home’s worth by up to 20% - or even more in places like London and North London.
At Trimble Architects, we specialise in planning and delivering quality London loft conversions that enhance both lifestyle and value. Whether you're adding an extra bedroom, a home office, or an en suite bathroom, our expert team ensures every loft conversion project is carried out with care and attention to detail.
The success of your project depends on good planning and the right architectural design. Mistakes made during the planning process can lead to delays or added costs, so we work closely with you to manage the whole process. From feasibility to construction, we help you make the right choices based on your home and goals.
Our loft conversion architects support homeowners from the first step through to completion. With a focus on value, function, and comfort, our aim is to deliver a new space that truly improves your life.
Adding a Loft conversion to your property
Adding a loft conversion to your home starts with good architectural design. Our conversion architects at Trimble Architects provide expert architectural services to help you plan your dream loft. Whether you need more space for a growing family or want to create a quiet retreat, we’ll make sure the design suits your lifestyle.
We provide detailed loft conversion drawings that show how your new space will look. From attic space to full loft extension, our expert team creates tailor-made designs based on your house, roof type, and structure. You may need to check if you require planning permission depending on your location and project size.
There are many types of loft conversion to choose from, including dormers, mansards, and hip to gable. Our website has helpful articles and guides to help you browse options, understand planning applications, and get the answers you need.
If you’re unsure where to start, we’re happy to offer expert advice and support. Simply get in touch and we’ll help you make informed decisions. All our services follow building regulations and planning guidelines, ensuring your project stays on track and meets all requirements.
Our loft conversion architects
Our loft conversion architects bring years of experience to every project. At Trimble Architects, we provide complete project management from design to construction. Whether your house needs more space or you’re simply adding space for comfort, we’re here to help.
We understand how stressful home changes can be, so we take care of every detail. Our expert team works hard to make your loft feel just right - on time, on budget, and without added pressure.
From attic renovations to large-scale loft conversions, we’ve helped thousands of clients across London create functional, beautiful spaces. Whether you're aiming for a simple bedroom or a luxurious loft with interior design features, we’ll make your vision a reality.
We offer free quotes, expert support, and flexible schedules to suit your time. Every loft we convert is handled with care, using high-quality materials and trusted builders. You can trust us to deliver great results while keeping your build process calm and well organised.
We believe every homeowner deserves a safe, stylish loft conversion. That’s why we provide clear plans, strong project support, and expert guidance at each stage.
Improving your living space
At Trimble Architects, we understand the importance of a comfortable and functional living space. Our loft conversion specialists are here to help you make the most of your loft. Whether it’s for an extra bedroom, a playroom, or simply adding space to enjoy life, we guide you through every step of your loft conversion project.
Our expert architects take care of the design process and building requirements, working closely with you to ensure the final design meets your needs. We cover every detail - from roof lights and insulation to interior design and lighting. Every decision is made with safety, comfort, and functionality in mind.
Our guide explains how to choose the right type of loft conversion for your house. Whether you live in a flat, terraced house, or detached home, we tailor each project to suit your structure and style. If you’re unsure about local regulations or whether you require planning permission, our expert team is here to support you.
Planning a loft conversion during calm months like March can make the build process easier and help you stay on schedule. We always aim to reduce stress and make the whole process as smooth as possible, working alongside you to find the best solutions.
Simply reach out to us with your questions or visit our website for more advice. We’re happy to help you improve your home and achieve the results you’re looking for.
Planning your loft conversion
Planning your loft conversion is the first step toward creating more space in your home. When we visit your property, we assess the feasibility of your loft conversion and help determine if it meets all planning and building regulations.
We help manage the approval process, from submitting design plans to handling planning applications. If you live in a conservation area or require full planning permission, our expert architects will guide you through the rules and requirements. We work hard to avoid delays and make the planning process simple and clear.
With strong project management and a skilled team, we take care of your loft conversion from the initial concept to the final build. Each job is planned with attention to detail, giving you peace of mind. Our expert team includes builders, developers, and conversion architects, all working together to deliver high-quality loft extensions.
Our services are competitively priced and follow all regulations. We support you with everything—structure planning, lighting options, budget planning, and safety standards. We’ll help you determine the best way to make use of your attic space, whether it’s to add more room, value, or lifestyle features to your home.
We understand that planning a loft conversion can feel daunting. That’s why we strive to provide expert advice, innovative solutions, and support at every stage. If you're thinking about converting your loft, simply contact us. We’ll arrange a free visit and help bring your ideas to life with architectural design tailored to your home.
Frequently Asked Questions
About Our Loft Conversions Architect
Find out more about our loft conversions architect from our frequently asked questions. If you require any further information, feel free to get in contact on 020 8538 9303.
A professional loft conversion architect designs functional and stylish spaces, transforming your loft into a usable area.
They provide architectural plans for loft conversions, ensure compliance with building regulations, and create bespoke loft conversion designs tailored to your needs.
Loft conversion architects also coordinate with builders and oversee the project for seamless execution.
While not mandatory, hiring a home loft conversion architect ensures your project is well-designed and adheres to regulations.
Residential loft conversion architects bring creativity and expertise to create a space that maximises functionality and value while addressing structural and aesthetic considerations.
The cost of hiring a loft conversion architect near me varies depending on the complexity of the design and scope of services.
Typically, fees range from 5-15% of the total project cost. We offer affordable loft conversion architecture tailored to your budget and requirements.
Hiring a loft conversion expert ensures professional design, compliance with regulations, and efficient use of space.
Loft conversion design services provide innovative ideas, increase property value, and ensure a smooth planning and construction process.
Architects also collaborate with builders for a cohesive project outcome.
Yes, loft conversion planning permission is often necessary for certain projects, such as dormer extensions or properties in conservation areas.
Our local loft conversion architecture services include handling permission applications and ensuring your project complies with all regulations.
Modern loft conversion designs include dormer, hip-to-gable, mansard, or Velux (rooflight) conversions.
Custom loft conversion solutions can include en-suites, home offices, or extra bedrooms.
Our bespoke loft conversion designs are tailored to your lifestyle and preferences.
The design process typically takes 4-8 weeks, depending on the complexity of the project and the need for loft conversion planning permission.
As loft conversion architects near me, we work efficiently to ensure timely delivery of plans while maintaining high design standards.
Choose residential loft conversion architects with experience, a strong portfolio, and excellent client reviews. Look for someone who provides custom loft conversion solutions and understands your budget.
Local expertise, like our local loft conversion architecture services, ensures knowledge of regional regulations and building practices.
Yes, professional loft conversion architects often collaborate with builders, providing detailed plans and guidance during construction.
This partnership ensures that the design is accurately implemented, saving time and reducing potential issues.
Absolutely. Maximising space with loft conversions is one of our specialities.
We use clever design techniques, such as strategic window placement, built-in storage, and open-plan layouts, to transform even the smallest lofts into functional and beautiful spaces.
Trimble Architects
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If you require a New Build House get it touch today. We offer RIBA chartered architectural services throughout Hounslow, Twickenham, Richmond, Kingston Upon Thames, Teddington and South London. We look forward to hearing from you!
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