house extension architects.
Transform your home with a beautifully designed extension.
Add space, value, and style without the hassle of moving. Expert architects creating extensions that enhance your home and lifestyle.
Expert Extension Design.
A well-designed extension can completely transform your home, adding valuable living space while avoiding the cost and disruption of moving. As specialist extension architects, we create designs that seamlessly blend with your existing property while meeting your family's needs.
Whether you need a larger kitchen, extra bedrooms, a home office, or simply more space to grow, we'll design an extension that enhances both your lifestyle and your property value.
With extensive experience across Cornwall, Devon and Somerset, we understand planning policies and can often achieve permitted development where others require full planning permission.
Benefits of Extending:
- •Add up to 30% more living space
- •Increase property value by 5-15%
- •Avoid stamp duty and moving costs
- •Stay in your neighborhood
- •Create your perfect living space
- •Improve energy efficiency
- •Often no planning permission needed
- •Less disruption than moving
Types of House Extensions We Design
Kitchen Extensions
Create the heart of your home with a spacious kitchen-dining-living space. Popular for family life and entertaining.
- • Open plan living
- • Bi-fold doors to garden
- • Kitchen islands
- • Natural light maximization
Rear Extensions
Extend into your garden to create additional living space. Perfect for growing families needing more room.
- • Single or double storey
- • Garden room connections
- • Often permitted development
- • Flexible use spaces
Side Return Extensions
Transform narrow side passages into valuable living space. Ideal for Victorian terraces and semi-detached homes.
- • Maximize plot usage
- • Create open plan layouts
- • Popular in urban areas
- • Great value addition
Loft Conversions
Convert unused attic space into bedrooms, offices, or playrooms. One of the most cost-effective ways to add space.
- • Master bedroom suites
- • Home offices
- • Often permitted development
- • Dormer or Velux options
Double Storey Extensions
Maximum space addition with ground and first floor extensions. Transform your home's capacity and layout.
- • Multiple new rooms
- • Complete home transformation
- • Best value per square meter
- • Reconfigure entire layout
Wrap Around Extensions
L-shaped extensions combining side and rear additions. Creates dramatic open-plan spaces with multiple aspects.
- • Maximum ground floor space
- • Corner glazing opportunities
- • Complete ground floor redesign
- • Indoor-outdoor living
Permitted Development Rights
Build Without Planning Permission
Many extensions can be built under Permitted Development Rights (PDR) without needing planning permission. This saves time and money while still allowing significant home improvements.
As expert extension architects, we maximize what's possible under PDR while ensuring compliance with all regulations. Where planning is needed, our 98% success rate ensures approval.
Check Your Permitted Development Rights →Typical PDR Allowances:
- • Single storey rear: 6m for semi/terraced, 8m for detached
- • Double storey rear: 3m from original wall
- • Side extensions: Half width of original house
- • Height limits: 4m for single storey
- • Loft conversions: 40-50 cubic meters
*Restrictions apply in conservation areas, AONBs, and for listed buildings
Our Extension Design Process
Consultation
Free home visit to discuss your needs, assess possibilities, and provide initial advice.
Design
Develop designs that maximize space, light, and value while complementing your home.
Approvals
Handle planning (if needed) and building regulations to get all necessary approvals.
Construction
Detailed drawings for builders and support during construction to ensure quality delivery.
House Extensions Across the South West
Extensions Cornwall
From Cornish cottages to coastal properties, we design extensions that respect local character while adding modern living space.
Cornwall Extension Architects →Extensions Devon
Expert extension design across Devon, from Exeter townhouses to Dartmoor cottages, maximizing space and value.
Devon Extension Architects →Extensions Somerset
Beautiful extensions for Somerset homes, from Bath's Georgian terraces to rural farmhouses across the county.
Somerset Extension Architects →Extension FAQs
Do I need planning permission for an extension?
Many extensions can be built under permitted development rights without planning permission. Single storey rear extensions up to 6m (or 8m under prior approval) and side extensions under certain conditions often don't need planning. However, larger extensions, those in conservation areas, or on listed buildings will need permission.
How much does a house extension cost?
Extension costs vary widely but typically range from £1,500-2,500 per square meter for a basic extension to £3,000+ for high-spec designs. Kitchen extensions average £15,000-30,000, while double storey extensions can cost £30,000-70,000+.
How long does it take to build an extension?
A single storey extension typically takes 3-4 months to build, while a double storey extension may take 4-6 months. Planning and design add 3-4 months before construction starts.
Will an extension add value to my home?
A well-designed extension typically adds 5-15% to property value, often more than the cost of building. Kitchen extensions and extra bedrooms tend to add the most value.
Start Your Extension Project Today
Free consultation to discuss your extension ideas. We'll visit your property, assess the possibilities, and provide expert advice on the best way forward.
start a conversation.
Get expert architectural advice for your project.
- Initial consultation
- Planning permission guidance
- No obligation quote
We aim to respond to all enquiries within 24 hours (excluding weekends / bank holidays).