Surrey’s trusted loft and extension specialists

Newly built double story extension completed in Surrey

We help you achieve more space and increase the value of your home.

Who we are

At Seven Hills Developments, we are a trusted building company based in Cobham, Surrey, specialising in high-quality property development, home renovations, loft conversions, home extensions and new builds. With years of experience and a passion for craftsmanship, we turn ideas into exceptional living spaces.

Whether you’re planning a full-scale home extension, a bespoke kitchen renovation, or a complete property transformation, our expert team delivers tailored solutions with precision and care. As one of the leading construction companies in Surrey, we take pride in our reputation for reliability, transparency, and outstanding results.

Close-up of new loft conversion with dark gray roof tiles, two white-framed windows, a black gutter system along the roof edge, and a satellite dish on the side.
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    Public liability

    Up to £10 million cover

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    What's important to us

    Reliability, communication & high quality craftsmanship

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    10+ years of experience

    Over 10+ years of building experience & knowledge

Loft conversion

Seven hills developments have completed a loft conversion for us and we couldn’t be happier, from our initial meeting they put all our concerns to rest. The team and all trades were extremely friendly with a wide range of knowledge to answer and questions we had along the way.

Samantha & John

Epsom

Testimonals

Side and Rear extension

We are over the moon with our new extension, it has completely changed our house by adding on the extra space. Andy and his team were fantastic throughout the whole project, we would definitely recommend them and have already spoken to them about doing more work to our house.

Jane & Andrew

Claygate

Kitchen Extension

We were recommended seven hills developments through a friend and they didn’t dissapoint, they completed the work efficiently and to a very high standard.

Simon

Cobham

Minimalist bedroom with a skylight, a window, a bed with neutral bedding and pillows, bedside tables with lamps, and white built-in wardrobes.
A small brick house with blue window frames and sliding glass door, outdoor space with artificial grass, neighboring multi-story houses in the background, overcast sky.
View from a rooftop showing a residential street with parked cars, houses, and a construction site with scaffolding and building materials.
Roof construction site showing a new flat black roof, brick chimney, scaffolding with wooden planks, and cloudy sky in the background.
A construction site showing a sloped roof being built with wooden battens and installed skylights, covered by scaffolding and a protective roof.
Backyard patio with outdoor furniture, potted plants, and a wooden deck in front of a white house with a red tiled roof.
View from a scaffolding platform on the roof of a brick house, showing construction materials and black drain pipes, with neighboring rooftops and cloudy sky in the background.
The back of a two-story brick house with a new glass door and window on the ground floor, and older windows on the upper floor, under a partly cloudy blue sky.
Living room with a dark gray accent wall featuring built-in shelves, a central open space with a large TV, and display items illuminated with lighting.
Close-up of a modern shower corner with dark gray tiled walls, a round showerhead, and a gold-colored control panel with a lever and knob. A wooden towel rack with two white towels is mounted on the right side.
A modern kitchen with grey cabinets, white countertops, and light wooden herringbone flooring. There is a small dining table with white chairs near sliding glass doors.
A close-up view of a grey tiled house roof with black gutters and drainpipes, and a telecommunication satellite dish on the side, under a partly cloudy sky.
View of residential rooftops with gray tiles and clear blue sky in the background.
Construction site with wooden framing for a new roof on a residential building, with scaffolding around the perimeter and blue sky with a few clouds overhead.
A modern white two-story house with black window frames, a dark roof, and a black front door with a small overhang. There is a black car parked in the driveway, and a tree with bare branches is on the left side of the house. The sky is partly cloudy
A brick house with two stories, featuring white-framed windows on both floors, and a small plant growing in front. The house has a traditional design with a combination of red and yellow bricks.

Get in Touch!

Schedule an appointment for our initial consultation

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FAQ

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  • First things first, don't be nervous. We'll start with a free consultation to determine your design needs or if you have plans in place to run through all the details with you to get an accurate price.

  • We mainly cover Surrey, Hampshire and parts of south London

  • We work closely with a few architectural companies, so we can supply a full package from concept to completion.