Estimating the cost of building an extension.
Are you considering a home extension, renovation, or even an entirely new build?
One of the most crucial aspects of your project is estimating the cost of building an extension. Understanding the potential costs involved is essential for planning and budgeting effectively.
At Sheldon Peever Studio, we understand that every project is unique, and accurately estimating costs can be a complex task. However, we’re here to provide you with an overview of the typical expenses associated with different parts of the design and construction process. By breaking down the costs into various components, you’ll gain a clearer picture of what to expect and how to plan your dream home build.
Read our latest blogs on the cost of building in 2026 including info on square metre rates for new and refurbishment works.
How to reduce the cost of your build without losing the essence of the project and our fees.
Using Our Estimation Calculator:
Use our cost calculator to estimate a rough cost of your build, based on additional bedrooms, bathrooms, kitchens and more.
(+VAT ) NOTE: NEW BUILDS ARE ZERO VAT RATED.
Contact
Get in touch .
Book a FREE 30 minutes call to discuss bringing your dream home to reality with one of our senior team.
The outcome of that call will be:
- Having answers to your crucial questions.
- A clearer understanding of how to build your dream home.
- A 6 stage pathway to success laid out for you to follow.
Architect’s and Other Consultants’ Fees
(£5,000 – £20,000+)
Before construction begins, you’ll need architectural drawings. These are essential for obtaining planning permissions and ensuring your project meets all the latest building regulations. Architectural fees can vary based on the complexity of the project and the level of detail required.
Planning and Building Regulation Fees
(£1,500 – £3,000+)
Obtaining planning permission and complying with building regulations is a necessary step. These fees cover the cost of submitting applications and building control carrying out inspections to ensure your build meets all legal requirements.
Contingency Fund
(10% – 15% of Total Costs)
It’s crucial to set aside a contingency fund to cover unforeseen expenses or changes during the build. Typically, this fund ranges from 10% to 15% of your total estimated costs. Generally speaking the older the property and the poorer condition, the higher your contingency should be. If the contingency is required, it is to rectify unknown issues. It tends to happen during the demolition and excavation works which are at the start of a project.
The Importance of Professional Guidance
While our cost calculator provides a helpful starting point, it’s essential to remember that every project is unique, and unexpected challenges can arise. At Sheldon Peever Studio, we offer a free consultation where you can discuss your project in more detail. Read our latest blog regarding the cost of building in 2025.
What sets us apart is our end-to-end support. From the initial design phase through to construction, we’re with you every step of the way. Our comprehensive services ensure that your project is not only well-designed but also well-executed, resulting in your dream home becoming a reality.
Ready to turn your dream home into a reality? Contact us today to schedule your free consultation and start your journey toward a beautifully designed and expertly built space that you’ll cherish for years to come. Let’s build your dream home together!
Contact
Get in touch .
Book a FREE 30 minutes call to discuss bringing your dream home to reality with one of our senior team.
The outcome of that call will be:
- Having answers to your crucial questions.
- A clearer understanding of how to build your dream home.
- A 6 stage pathway to success laid out for you to follow.
2 responses to “Estimating the Cost of Your Home Extension.”
[…] fees, building costs and VAT. Your Architect will be able to guide you on this. Take a look at our building cost calculator to estimate the cost of your building […]
[…] If you need some guidance on what the build cost for your home extension or renovation project might be take a look at our cost calculator. […]