Expert Home Extensions in Hertfordshire & North London
At Reservoir Construction, we specialise in high-quality home extensions across Barnet, North London, Hertfordshire, and Welwyn Garden City. Our fully managed service takes care of every detail - from planning and design through to build and finishing - giving you more space, more comfort, and more value for your property.
A home extension is one of the most effective ways to improve your living space without moving house. Whether you’re adding a kitchen extension, an extra bedroom, or a full two-storey addition, our expert team ensures a seamless process and exceptional results.
Over Garage
Create an extra bedroom, office, or playroom above your garage without expanding your footprint.
Side Extension
Expand sideways to create extra kitchen, dining, or living space, as well as utility rooms or play areas.
Wrap Around
Combine rear and side extensions for maximum space and versatility
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Rear Extensions
Extend your kitchen or living space to create open-plan layouts perfect for modern family living.
Double Storey Extension
Add significant square footage with upstairs and downstairs space, ideal for growing families.
Front Porch Extension
Improve practicality, kerb appeal, and entrance storage.
Conservatory
Enjoy a light-filled space connecting your garden and home, perfect for relaxing or dining.
Why Choose Reservoir Construction For Your Home Extension?
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Local specialists in Barnet, North London, Hertfordshire & Welwyn Garden City
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Full end-to-end service: design, permissions, construction, finishing
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Skilled team with experience in local planning rules and permitted development
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High-quality craftsmanship with a 10-year workmanship guarantee