Extension architects in Hampshire and Dorset

Based in Bournemouth, Southampton and Portsmouth, we’re extension architects that will turn your vision into reality, providing additional space that you and your family can enjoy and create amazing memories in for years to come.

Transforming spaces, realising potential.

Whether it’s accommodating a growing family, creating a home office, or a gym, space constraints often limits our lifestyle aspirations. 

With our expertise in space optimisation and creative architectural design solutions, we tailor every aspect of your conversion to suit your specific needs, tastes and aspirations.

Over the years, we’ve helped our clients transform everything from their kitchens, outdoor spaces and bedrooms, all the way to creating a better layout for their entire house.

Kitchen extensions


GRK architecture offers a transformative approach to kitchen extensions, seamlessly blending functionality with aesthetic appeal to create spaces of unparalleled beauty and utility.

Drawing from a rich palette of design elements, we infuse extensions with timeless elegance and modern innovation, crafting environments that effortlessly harmonise with existing structures while redefining spatial dynamics.

Through thoughtful integration of natural light, strategic placement of windows, and meticulous attention to detail, GRK architecture maximises both visual allure and practicality, resulting in kitchens that serve as the heart of the home, inviting inhabitants to indulge in culinary creativity and convivial gatherings.

With a commitment to excellence and a deep understanding of architectural principles, we’ll elevate your kitchen extensions to new heights, offering a truly remarkable fusion of form and function.


Single story extensions.

GRK architecture is renowned for its expertise in crafting breathtaking single-story extensions that redefine the concept of home living.

Whether it’s a seamless addition to expand the kitchen space, a tranquil sunroom to embrace natural light, or a versatile family room for leisure and entertainment, GRK architects tailor each extension to suit the unique needs and preferences of homeowners.

With meticulous attention to detail, GRK architects prioritise functionality alongside aesthetics, optimising spatial layout, maximising natural ventilation, and incorporating sustainable features to create spaces that are not only visually stunning but also environmentally conscious.

Double story extensions.

GRK is celebrated for its ability to design double-story extensions that redefine residential spaces, focusing on the efficient utilisation of every inch.

Whether it’s expanding communal areas, crafting private spaces, or seamlessly connecting indoor and outdoor environments, GRK architects approach each project with a keen eye for maximising functionality and enhancing usability.

From sleek modern designs to timeless classics, GRK ensures that every extension seamlessly integrates with the existing structure while making a bold architectural statement.

Emphasising natural light and spatial flow optimisation. GRK architecture not only enhances the aesthetic appeal but also elevates the comfort, practicality and the value of your home.

Book your free consultation.

Let’s explore the possibilities of your space and start the exciting journey of bringing your lifestyle aspirations to life.

Book your free consultation at your home or one of our offices in Southampton, Bournemouth or Portsmouth.

We handle every aspect of your project with meticulous attention to detail.

Beyond aesthetics, we navigate complex planning regulations, ensuring your project meets all legal requirements while managing every detail of the process with precision and finesse.

Our goal is to provide a hassle-free experience, turning the complexity of building into a seamless journey. We treat every client like they are our only client, and we thrive on seeing our clients realising their dream home.

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Planning Permissions

Our team are here to help and advise you with all the planning regulations. So, if you need a permitted development certificate or full planning permission, we can manage this whole process for you.

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Architectural Designs

Your vision and requirements lead the way and everything we design is bespoke for you. We'll create a full suite of plan and 3D renders so that you can fully visualise and experience your dream home. 

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Technical Documentation

We meticulously create intricate architectural plans and specifications for the construction phase, ensuring that every part of your vision is bought to life with precision and excellence.