Construction Projects In Cornwall

Extensions & renovations

Modern house with large extension, blending perfectly, white walls, slate roof, wooden accent wall, and black-framed windows, surrounded by landscaped garden with gravel path and plants completed by Runnalls Construction.
A modern kitchen extension with dark blue cabinets, a white kitchen island with a dark base, and bar stools. Hanging pendant lights and large french doors leading outside. The kitchen is visible from the original room.

Transforming Cornish Homes

Runnalls Construction specialises in extending and renovating local Cornwall properties to create more space and enhance everyday living. Our extensions range from practical garage and stunning kitchen additions to thoughtful lifestyle features like outdoor showers, all designed to complement existing Cornish homes. We also undertake complete renovation projects, gutting and refitting entire properties for more comfortable, practical modern living—or a combination of both extension and renovation work.

Each project is approached with careful attention to quality materials, ensuring new additions blend seamlessly with original structures while maximizing the potential of your North Cornwall home. We even complete the landscaping for you!

Living room extension with wood flooring, a wall-mounted TV, woodburner, skylight and french doors adds additional space to this cosy Cornish home
A residential rooftop showing a new skylight window and dormer window with a large blue flat roof, extension and landscaped backyard creating additional and comfortable spaces for this Cornish Home
Complete bungalow renovation into modern timber clad home with new driveway, extension and planted wallin Cornwall l
The interior of a historic stone barn under renovation, with exposed stone walls, a wooden roof structure with insulation, and construction tools including a wheelbarrow and shovel. Transformed to beautiful home in Cornwall by Runnalls Construction
Mixure of old stone wall and modern roof and black cladding ona barn conversion in Cornwall

Historic Cornish Barn Transformation

A comprehensive renovation of a traditional Cornish stone barn, expertly transformed from an unstable structure into a stunning modern home. This North Cornwall project began with essential structural stabilization of the original stone walls, followed by complete roof replacement to ensure the building's longevity.

The exterior renovation includes striking black cladding that creates a contemporary contrast with the preserved stonework, while dramatic floor-to-ceiling windows across the front elevation flood the interior with natural light and frame views of the surrounding Cornish countryside.

Internal works included full modernization throughout. This project demonstrates our expertise in sensitively converting traditional Cornish agricultural buildings into exceptional residential spaces.

A black metal building with a gable roof and large glass doors and windows, set against a rural landscape with green fields and a tree, under a cloudy sky. This is the outcome of a barn conversion in Cornwall converted by Runnalls Construction

Garden Annexe & Garage Construction

A small wooden house with a sloped roof featuring black solar panels. The house has four windows, a front door, and a gravel pathway leading to it. This small home has been created by Runnalls Construction in Cornwall
A oak frame garage and two car port . The garage has vertical wooden siding, a sloped roof with two skylights, the upstairs is reach via external wooden steps and is a large living space.

Garden Annexes and Garages – Quality Outbuildings Designed for Cornwall

These projects demonstrate Runnalls Construction's commitment to creating high-quality, versatile spaces that respect their Cornish surroundings. The first two-storey build thoughtfully combines modern larch cladding on visible elevations with traditional black farm-style cladding where it meets the hedge, ensuring it sits naturally in the landscape while maximizing efficiency with solar panels and clever use of roof space. The second, a substantial 9m x 6m oak-framed structure with Siberian larch cladding, provides spacious first-floor accommodation above an enclosed garage and two-bay carport. Both showcase our dedication to quality materials, thoughtful design, and creating functional spaces that enhance Cornish properties while blending seamlessly with their environment.

A wooden garage building with a pitched roof, two skylight windows, and an open section with a car parked inside. A staircase with railings leads up to a doorway into the above accommodation.

Landscaping and groundworks

Our lovely dog Ralph sitting on a newly installed spacious stone patio .
A stone and brick retaining wall along a pavement creating a stunning boundary for a modern home. Part of a landscaping project in Rock, Cornwall

Making sure outside is as good as inside!

These projects showcase our approach to outdoor spaces—combining traditional Cornish craftsmanship with contemporary design. From classic drystone walls that anchor properties in the landscape to striking timber and steel retaining walls with integrated lighting that create drama and definition, we handle every aspect of groundworks with the same attention to detail as our buildings. Whether it's sculpting sloping lawns, installing gravel driveways that manage the Cornish weather, or adding those final touches that transform a site, we create outdoor spaces that are creative, practical, and built to last. Your outside should work as hard and look as good as your inside.

A wooden fence with wire strands and exterior lighting along a gravel driveway at sunset. Behind is a fresh laid lawn and stunning Cornish stone retaining walls creating a boundary for the property and a flower bed ready for planting.

COMMERCIAL construction

St Tudy Community Hall, Long Low Timber clad building with multiple full height windows and doors, fencing and landscaping

St Tudy Community Center

Runnalls Construction delivered this striking new-build community facility in the heart of St Tudy. The modern wood-clad building features wide accessible entrances, enclosed outdoor spaces with expansive double doors, and interiors flooded with natural light. Generous kitchen and preparation areas are ideal for community gatherings, while extensive solar panels ensure low running costs and long-term sustainability—a perfect blend of contemporary design and practical functionality for Cornwall's village communities.

Inside St Tudy Community center the large kitchen with white cabinets, a black countertop, a sink, a small refrigerator, a large window is sat on a practical and easy clean flooring that goes throughout the building.
Communal area at St Tudy Community center with practical flooring, white walls, a small kitchen area with white cabinets, a sink, and a wooden double door.
Large open windows illuminate the interior of the shop creating atmosphere. Shwoing the strcuture of the roof, inset lighting and room dividers
Single height room dividers ae used for create displays for clothers and home furnishing

St Kew Farm Shop

Runnalls Construction created this stunning wood-clad commercial building for St Kew Farm Shop, designed to showcase plants, homeware, and clothing in style. The elongated structure features multiple floor-to-ceiling doors and windows that flood the interior with natural light, while exposed construction details and carefully chosen finishes like the tiled counter add character and height. This project demonstrates our ability to design and build retail spaces in North Cornwall that are both visually striking and perfectly suited to their purpose—creating an inviting environment where products and plants can truly shine.

Green tiled counter at St Kew Farm Shop with stylish hanging lights, shelveing and large plants
Exterior of St Kew Farm shop building, ingle story with silver wood and slate roof, large floor to ceiling windows and landscping including rows of plants, decking spacef or tables and chairs

Ready to start your project in Cornwall?

Whether you're planning a barn conversion, home extension, or complete new build across North Cornwall, we'd love to hear from you. Get in touch today for a no-obligation chat about bringing your vision to life.

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Lydia, Danny and Mitchell, some of the team from Runnalls Construction outside the St Tudy community center in Cornwall. Wood cladding, security lighting and large black windows that flood the interior with light can be seen in the background