Seven Hills Developments

Loft Conversion and Extension Builders in Surrey

Newly built double story extension completed in Oxshott

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

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Who We Are!

At Seven Hills Developments, we specialise in high-quality loft conversions, home extensions, and residential building projects across Surrey. With years of hands-on experience in the construction industry, we help homeowners create more space, improve functionality, and add long-term value to their properties.

We are a trusted Surrey building company focused on delivering expertly built loft conversions and house extensions with exceptional workmanship, honest communication, and reliable project management from start to finish. Whether you are looking for a dormer loft conversion, hip-to-gable conversion, rear extension, side return extension, wraparound extension, or a full home renovation, our team works closely with you to bring your vision to life.

Based in Surrey, we proudly work with homeowners across areas including Epsom, Ewell, Leatherhead, Cobham and Guildford. Our goal is to deliver high-end loft conversions and extensions in Surrey that combine quality craftsmanship, practical design, and attention to detail.

From the initial consultation through to completion, we take pride in making the building process straightforward and stress-free for our clients. Every project is completed to a high standard, with a strong focus on structural integrity, finish quality, and customer satisfaction.

If you are considering a loft conversion or house extension in Surrey, Seven Hills Developments can help you unlock the full potential of your home.

Hip-to-Gable Loft conversion in Epsom
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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

A Local Building Company You Can Rely On

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Seven Hills Developments is an owner-led building company specialising in loft conversions, house extensions and complete property refurbishments across Surrey and South West London.

With more than 10 years of hands-on construction experience, we provide knowledgeable advice, dependable project management and high-quality workmanship from the initial site visit through to completion.

Our experienced team can manage every stage of your project, including groundworks, structural work, brickwork, roofing, carpentry, insulation, plumbing, electrics, plastering and internal finishing. This gives you one reliable point of contact throughout the build.

We regularly work with homeowners in Epsom, Ewell, Cobham, Esher, Oxshott, Leatherhead, Surbiton, Kingston, Guildford, Reigate and the surrounding areas.

Why Choose Seven Hills Developments?

● More than 10 years of building experience

● Specialists in loft conversions and house extensions

● £10 million public liability insurance

● One-year structural workmanship warranty

● Detailed and transparent quotations

● Full project management from start to finish

● Trusted architects and structural engineers

● Regular communication throughout the project

● Respectful and organised work in occupied homes

● High-quality materials and workmanship

● Free initial consultation and site visit

Whether you already have architectural drawings or require help developing your plans, Seven Hills Developments can provide a tailored construction package for your home.

Considering a loft conversion, extension or refurbishment? Contact our team to arrange a free initial consultation and discuss your ideas.

View our recent Loft Conversion
View our recent Extension

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.
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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

Get in touch
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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.