Design-led house extensions by award-winning architects
Transform your home with bespoke, energy‑efficient house extensions
Your house extension should do more than add extra space – it should transform how you live and increase your property’s value.
With Base Architecture, you’ll partner with award‑winning residential architects who manage every stage, ensuring your project runs smoothly, on time, and on budget.
20+
years experience
complete planning-to-build service
Award-winning designs
Riba chartered architects
WHY CHOOSE
Base architecture?
hands-on guidance
Your project manager simplifies decisions, handles permissions, and keeps everything on track.
creative, bespoke designs
We turn constraints into opportunities, tailoring every design to your lifestyle while maximising light, flow, and efficiency.
sustainable and compliant
We specify eco‑friendly materials and technologies to reduce energy and running costs, while handling all planning permissions.
proven quality
With multiple design awards and glowing client testimonials, we deliver high‑quality spaces that elevate your home and enrich your life.
initial considerations
Every great house extension begins with a conversation. We listen, understand your needs, and align our expertise to achieve your vision.
budget planning
We’ll help you set a realistic budget, include contingencies, and highlight long-term savings through energy-efficient design.
professional services
We coordinate structural engineers, surveyors, and consultants to ensure seamless quality and communication throughout.
design & regulations
Our house extension architects create bespoke, modern plans that complement your property and meet all planning and regulatory requirements – without compromising on creativity.
DESIGN CONSIDERATIONS
Our team crafts a bespoke design for your house extension, considering spatial flow and natural light to balance aesthetics with practicality.
PLANNING PERMISSION & BUILDING REGULATIONS
We navigate the complexities of all planning permissions and regulations, ensuring your design remains compliant and stress-free.
TYPES OF EXTENSIONS
Whether you want a single‑storey kitchen, a side return, or a rear garden extension, we’ll design a space that’s perfectly tailored to your needs.
construction process
During construction, our focus shifts to precision, quality, and efficiency. Our experienced project managers manage every detail with care, keeping your build on track and your vision intact.
PRE-CONSTRUCTION PREPARATION
Once designs are approved, we carry out site surveys, finalise drawings and specifications, and select sustainable materials, alongside a clear timeline and a safe site.
THE BUILD PHASE
Our project managers oversee everything from foundations to final fixtures, collaborating with trusted contractors to ensure quality craftsmanship at every stage.
TECHNICAL INSTALLATIONS
Heating, electrics, plumbing, insulation and ventilation, and smart home technology – we design them all for performance, comfort, and efficiency.
FINISHING & VALUE
Finishing touches transform a build into a home. At Base, we focus on seamless transitions between old and new, enhanced natural light, and premium finishes that elevate your home.
INTERIOR FINISHING
Open-plan living, bespoke joinery, and contemporary design details make your space unique. We tailor every element of your home extension to your lifestyle.
EXTERIOR CONSIDERATIONS
From roofing and cladding to weatherproofing, we’ll help you choose the right materials to either complement your home or create a standout contrast.
POST-COMPLETION
After final inspections and building control sign‑off, we conduct a full snagging review and advise you on maintenance. We’ll even remind you to update your home insurance!
READY TO TRANSFORM YOUR HOME?
Every home is unique. We tailor our services to your needs, managing everything from planning to completion so you can relax and enjoy the results.
Enquire now for a tailored home extension proposal. We’ll discuss your ideas, budget and timescale, then provide expert advice on making your dream extension a reality.
Why our
customers
love us
Depending on the size and scale of the project, many extensions can be considered for permitted development rights. Some larger constructions, such as a double-story or wrap-around house extensions, will be subject to approval of a full planning application.
There are many factors that can dictate the cost of a house extension, such as the construction materials used and the quality of interior finishes. Rough guidelines sit between £45,000 – £75,000 for a fully managed build by specialist house extension architects.
Depending on the size and quality of the finish, house extensions will almost always add value to your home. However, it’s important to understand what this figure looks like so that your budget can be defined appropriately. In high-value areas, it’s not uncommon for well-designed and built extensions to significantly increase the value of a property.
Get Started Today
It all starts here, tell us a bit about your project and one of our expert architects will get in touch to discuss your idea in more detail.
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