High-end Bespoke Extensions
As experienced Devon building contractors, we’re able to create the extended space you need, making the best use of the available space, with our period bespoke extensions in Devon.
Tailored additions that complement your home’s character
We’ll help you retain the charm and authenticity of your home while providing the extra space and modern amenities you desire. The end result will be a beautiful, functional extension that enhances the overall aesthetic of your property and its setting.
Extend Your Dream Home with High-end Bespoke Extensions
Extending your home is now more popular than ever. With more people choosing to extend their homes, rather than struggling with the fees, charges, and costs involved with moving house, a home extension will give you the extra living space you need, while increasing the value of your home too.
Why is a Home Extension a great idea?
1
Increased living space
Add the extra room you need, whether it’s a larger kitchen, a dedicated home office, or a spacious family room.
2
Improved home value
Extending your home can significantly increase its market value, making it a smart investment.
3
Customised design
Work with our skilled team to create a bespoke extension that perfectly complements your property’s architecture and your lifestyle.
4
Avoid the hassle of moving
Extend your current home and avoid the stress and expense of finding a new property.
5
Energy-efficient construction
Our extensions are built to last and to the highest standards, ensuring your new living space is energy-efficient and cost-effective to run.
6
Seamless integration
We’ll ensure your extension blends seamlessly with the existing structure, creating a cohesive and visually appealing result.
Retain character and style
When extending your period or rural property, it’s essential to ensure the new addition seamlessly integrates with the existing structure and surrounding landscape. At Peninsula Custom Construction, we understand the importance of preserving the character and style of your home.
Our team of skilled builders and designers will work closely with you to create an extension that complements the architectural features of your property. We’ll offer guidance on roofing materials, door and window styles, and other design elements to ensure your new living space blends harmoniously with the original building.
We will offer honest advice and guidance over roofing, door, and window choices, helping you make the most of your newly extended living area. We pride ourselves on our attention to detail and high building standards, therefore our skilled building team makes Peninsula Custom Construction your first choice to fulfil your home’s potential.
Exceptional local expertise
High-quality extensions throughout the Plymouth, Devon and Cornwall areas, that have a reputation for excellence.
Uncompromising quality
We pride ourselves on our attention to detail and high building standards.
Personalised approach
Our skilled team will work closely with you to understand your vision and provide honest advice.
Customer satisfaction
Our unwavering dedication to customer satisfaction is at the heart of everything we do.
Featured projects
House Renovation in Horrabridge, Devon
We were contacted by our customer to work on an exciting 2-bedroom house renovation in Horrabridge, near Yelverton in West Devon.
Testimonials
Andy and Ian have been fantastic throughout our project to extend over our garage and create a new master bedroom with en-suite. They have overcome all the obstacles and challenges that have arisen during the construction and their attention to detail has been second to none. Our neighbours have commented on how quickly the job has been completed and the work ethic and professionalism of the team. We are really pleased with outcome of the project and can’t thank the guys enough for the work they have done.
Dave Manning – Tavistock
High-end bespoke extensions FAQs
What is a bespoke building extension?
A bespoke building extension is a fully customised addition to your home, designed around your style choices, architecture, and long‑term needs. Unlike off‑the‑shelf builds, a bespoke extension is tailored in every detail; from layout and materials to glazing, insulation, and finishes, ensuring a seamless blend with your existing property. Many homeowners pair extensions with a loft conversion to maximise space and value. Our blog on bespoke home extensions paints a picture of the sort of customisation associated with these types of extensions.
Every building project is different in Devon and Cornwall, and the best way to get an accurate figure for your renovation or refurbishment project is to get in touch with us for a free consultation.
How much does a 3m by 4m extension cost?
A 3m x 4m (12m²) extension typically costs between £14,400 and £30,000, based on UK averages of £1,200–£2,500 per m² depending on specification, materials, and location. High‑spec finishes, glazing, and structural complexity can push costs higher but also add value and character. Many clients also explore a loft conversion at the same time to maximise investment and shorten the overall construction timeline.
For an exact quote tailored to your property, get in touch via our contact page.
How deep do I need to dig foundations for an extension?
Foundations for extensions in the UK are most commonly 1–1.5 metres deep, though the exact depth depends on soil type, nearby trees, drainage, and structural load. Building Control will confirm the required depth during inspection. If you’re planning both an extension and a loft conversion, foundation requirements may influence your overall design strategy.
What is the most expensive part of building an extension?
The most expensive elements are usually structural work, including steel beams, foundations, and any required underpinning. High‑end finishes, glazing, and bespoke joinery can also significantly increase costs. This mirrors the cost drivers of a loft conversion, where structural complexity and specification have the biggest impact.
Do I need planning permission for an extension?
Whether you need planning permission for an extension depends on its size, height, and position in relation to your boundaries. Many single‑storey rear extensions qualify as permitted development, allowing you to build without formal planning approval if you stay within specific limits for depth, height, and materials. However, larger projects, side extensions, or extensions combined with a loft conversion may need permission because of their increased volume or structural impact, and regional characteristics in Devon and Cornwall can also play a part.
We provide more detailed information about planning permission for extensions on this blog, however, for an accurate answer it’s better to speak to our team, start by reaching out via the contact page.
What is the 50% rule for house extension?
The 50% rule refers to permitted development guidelines stating that you can extend your home without planning permission as long as the total additional volume (including previous extensions and loft conversion work) does not exceed 50% of the original property’s footprint. This helps maintain neighbourhood consistency while still allowing meaningful expansion.
For clarity on how this applies to your home, get in touch with us so you can start planning your development project.
How long does a house extension take?
Most single‑storey extensions take 8–14 weeks, depending on complexity, weather, and structural requirements. Two‑storey projects may take longer due to additional engineering and regulatory steps. For comparison, a typical loft conversion takes around 6–8 weeks. Naturally, weather and regional disruptions like roadworks, which aren’t uncommon in Devon and Cornwall, can sometimes increase the construction timeline. This is why it’s beneficial to speak to an extension contractor as early as possible, like Peninsula Custom Construction, as we can help you factor in every component of the build and give you a realistic completion date.
Is £40k enough for an extension?
£40k can be enough for a modest single‑storey extension, especially if the footprint is small and the specification is mid‑range. UK averages show typical single‑storey extensions ranging from £24,000 to £50,000 depending on materials and complexity. Many homeowners also invest in a loft conversion for additional space within a similar budget range.
Being local to Devon and Cornwall, we’re connected to trusted suppliers in the area and are able to source high-quality materials at a reasonable cost, which is how we’re able to deliver high-end extensions at competitive prices.
The best way to get an accurate figure for your renovation or refurbishment project is to get in touch with us for a free consultation.
Can I build a 2‑storey extension without planning permission?
In some cases, yes, two‑storey extensions can fall under permitted development if they meet strict criteria such as height limits, distance from boundaries, and matching materials. However, rules are tighter than for single‑storey builds, and combining this with a loft conversion may affect eligibility. Always check with your local authority or speak with us for guidance.
How much value will my extension add?
A well‑designed extension can add 10–20% to your property’s value, depending on size, quality, and location. A loft conversion, in the UK, typically adds around 18% on average, making the combination one of the strongest return-on-investment home improvements available.
To understand how much value your home could gain, contact Peninsula Custom Construction. We can give you a clearer estimate of the costs involved in your specific extension project and it costs nothing to find out.
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Contact us for all your building needs
If you’re looking for experienced builders who undertake all types of building work, including barn conversions, renovations, loft conversions, bespoke extensions, roofing and damp proofing then please get in touch with us either by phone, email or by using our contact form.
Office: 01822 366332
Mobile: 07930099454