Cornwall's economy runs on small and medium-sized businesses, from high street shops and cafes to offices, workshops and holiday parks. Sooner or later most of them need building work, whether it's a new shopfront, a kitchen refit, an extension for extra covers or a refurbishment of reception buildings and lodges. Commercial projects bring different rules and pressures from domestic work, and timing matters enormously when your income depends on the summer season. This guide explains the main things Cornish business owners should think about before starting a commercial refit or extension.
Common types of commercial project
The commercial projects we see most often across Cornwall include:
Shop refits and shopfronts, including new layouts, counters, lighting and accessible entrances.
Cafe, restaurant and bar refits, with kitchens, extraction, toilets and seating areas.
Office refurbishments, from open-plan layouts to meeting rooms and welfare facilities.
Holiday park and tourism buildings, such as reception buildings, shower blocks, cafes and site facilities.
Extensions to add floor space, covers, storage or staff areas.
Our commercial building services page explains how we work with businesses and professional clients.
Planning and change of use
Whether you need planning permission depends on what you're changing. Some key points:
Use classes. Since 2020, many town centre uses, including shops, cafes, restaurants, offices and some services, have been grouped into a single commercial class (Class E). Moving between uses within that class often doesn't need planning permission, but others, such as pubs and hot food takeaways, sit outside it.
Physical changes. Extensions, new shopfronts, external extraction flues and changes to the outside of a building will often need planning permission, even when the use doesn't change.
Conservation areas and listed buildings. Many Cornish town centres are conservation areas, and alterations to shopfronts, signs and materials are likely to be looked at closely. Listed building consent may be needed for internal and external works to a listed building.
Signage. Many illuminated or larger signs need separate advertisement consent.
Holiday parks. Sites often operate under planning conditions and site licences that may control the number, type and use of units, so check these before adding or altering buildings.
Our guides to planning permission in Cornwall and building in an AONB or conservation area explain the wider planning process.
Building Regulations and fire safety
Most commercial alterations and extensions need Building Regulations approval, and fire safety is usually the biggest consideration. Depending on the project, this can involve:
Means of escape, including exit routes, travel distances, door widths and emergency lighting.
Fire separation between different uses, such as a flat above a shop, or between a kitchen and seating area.
Fire detection and alarm systems suited to the building and its use.
Structural changes, such as removing walls or forming larger openings, which need engineering input.
Separately, the person responsible for a business premises must have a suitable fire risk assessment, and it should be reviewed after significant alterations. Our guide to Building Regulations in Cornwall explains how approval works.
Accessibility
Businesses that serve the public have duties under the Equality Act 2010 to make reasonable adjustments for disabled people, and new work generally needs to meet the access requirements of the Building Regulations. In practice, a refit is a good opportunity to consider:
Level or ramped entrances and suitable door widths.
Accessible toilets where needed.
Counter heights, circulation space and clear routes through the premises.
Lighting, contrast and signage that help people with visual impairments.
In older buildings with steps and narrow doorways, achieving this can take some creativity, particularly in conservation areas.
Other compliance for food and hospitality
Food businesses have extra considerations. You'll need to register with Cornwall Council's environmental health team before opening or after a significant change, and kitchens need surfaces, hand washing facilities and ventilation that support food hygiene. Commercial extraction must be designed to manage smells and noise for neighbours, and drainage may need grease management. Premises that sell alcohol or provide late-night refreshment may also need licensing changes. It's worth involving the relevant teams early so the design meets their needs first time.
Asbestos and existing buildings
Many commercial buildings in Cornwall were built or altered before 2000 and may contain asbestos. Owners and those responsible for non-domestic premises have a duty to manage asbestos, and a refurbishment survey is normally needed before intrusive work starts. Older shops and offices can also hide outdated wiring, poorly built past alterations or structural surprises, so allowing a sensible contingency is wise.
Working around trading and the season
For most Cornish businesses, the biggest factor is timing. The busy season usually runs from around Easter to the end of the October half term, with peaks in the summer holidays. To protect trading, it's common to:
Plan major works for the quieter months between November and March.
Phase work so part of the premises can stay open.
Schedule noisy or disruptive tasks outside opening hours where practical.
Keep safe, clearly separated routes for customers and staff.
Agree firm milestones so you can plan reopening dates, bookings and staff.
Because winter is the main window for commercial work, it's worth getting planning, Building Regulations and specification sorted well before autumn.
Managing cost and programme
Commercial projects often have fixed deadlines, landlords, lenders or head offices to satisfy, and several consultants involved. A clear specification, an agreed programme and regular cost reporting help keep everyone informed. If you're a tenant, check your lease, as landlord consent is often needed for alterations. Our project management and QS services can help with budgets, tendering and keeping the work on track, and our article on project management and quantity surveying in Cornwall explains what that involves.
Commercial building FAQs
Do I need planning permission to turn a shop into a cafe?
Often not, as both usually fall within Class E, but external changes such as extraction flues, a new shopfront or signage may still need permission or consent. Building Regulations and food registration will normally apply.
Can work be done while my business stays open?
Often, yes, with careful phasing, safe separation of work areas and some out-of-hours working. It depends on the type of work and the layout of the premises.
When should I start planning a winter refit?
Ideally in spring or summer, so that designs, approvals and long-lead items are ready in time to start as soon as the season ends.
Talk to us about your commercial project
Cornish Building Company works with businesses and professional clients across Cornwall. Visit our commercial building services page, call us on 01208 816991, or contact us to talk through your plans.
