September 16, 2025
For many homeowners, extending their property is an appealing way to create more space without moving house. Whether it’s adding a new bedroom, extending a kitchen, or creating a home office, an extension can transform the way you live. But while the prospect of extra space is exciting, a home extension is a significant project that requires careful planning.
Understanding the very first steps in the process is crucial. Rushing ahead without preparation can lead to unexpected costs, delays, or even planning issues. By taking a structured approach from the start, you can ensure your extension project runs smoothly and achieves the results you want.
Before contacting builders or architects, start with a clear understanding of what you want from the extension. Ask yourself:
Clarifying your goals ensures you design an extension that genuinely adds value to your lifestyle rather than one that looks good on paper but doesn’t serve your needs.
Your budget will shape every decision that follows, from design to materials and finishes. Many homeowners underestimate the total costs, forgetting to include fees for architects, planning applications, structural engineers, and even VAT.
Typical costs include:
Getting clear on your finances at the start avoids disappointment later. If you plan to use a loan or mortgage, explore your options early to avoid delays.
Not all home extensions require formal planning permission. Some fall under Permitted Development Rights, which allow certain types of extensions without going through a full application. However, these rules depend on factors such as size, height, and whether your property is in a conservation area.
If your extension doesn’t qualify under Permitted Development, you’ll need to apply for planning permission through your local authority. Research local planning policies to understand what is likely to be approved. A planning consultant or architect can guide you through this process.
Even if your extension doesn’t need planning permission, it will almost certainly need to comply with Building Regulations. These cover essential safety and quality standards for aspects such as:
You’ll need to submit building regulation drawings and have inspections during construction. Factoring this into your timeline and budget is essential.
The design stage is where your ideas become a workable plan. At this point, an architect or designer is extremely valuable, helping you make the most of your space while avoiding common pitfalls.
Think carefully about:
A strong design is not just about looks – it improves comfort, usability, and long-term value.
Even a modest extension involves a team of specialists. Choosing the right people early reduces risk and stress later.
Key professionals include:
Always check references, insurance, and past work before hiring. Request multiple quotes on the same information so you can compare fairly. A proper contract and clear payment schedule give you protection and keep expectations aligned.
Living through building works is rarely easy, so preparing for disruption is essential.
Things to think about:
Thinking through these practicalities makes the process less stressful and ensures the project doesn’t take you by surprise.
Timelines vary depending on the scale of the project, but you should expect several months from planning to completion. A rough breakdown might look like this:
Building in extra time for unforeseen delays is always wise.
Finally, consider how your extension will add value not just to your lifestyle but also to your property. Ask:
Thinking ahead ensures you make choices that balance immediate needs with long-term benefits.
Not always. Many small extensions fall under Permitted Development Rights. However, larger projects, or those in conservation areas, usually require planning permission. It’s best to check with your local authority or consult an architect.
Costs vary depending on size, location, and specification. While it’s difficult to give an exact figure, setting a clear budget that includes professional fees and a contingency fund is essential.
On average, smaller extensions take three to four months to build, while larger, more complex projects may take six months or longer. This excludes planning and design stages.
Yes, but expect disruption. Builders will need access, and there may be noise, dust, and periods without certain facilities. Some homeowners choose to move out temporarily for comfort.
In most cases, an architect or designer should come first to create drawings and plans. These can then be used to obtain quotes from builders. However, some design-and-build companies handle both.
Focus on quality design, good materials, and functionality. Extensions that improve living space, natural light, and modern layouts typically offer the best return on investment.
Planning a home extension is a major undertaking, but getting the first steps right lays the foundation for success. By defining your goals, setting a realistic budget, checking permissions, and working with the right professionals, you can turn your vision into a practical and rewarding project.
A carefully planned extension doesn’t just add square footage; it enhances the way you live, increases your property’s value, and allows your home to grow with your needs. With preparation, patience, and expert guidance, your extension can be one of the most rewarding investments you make in your home.
Ready to bring your home renovation or extension vision to life? At Milkov & Son Construction, we specialise in Architectural Design, Design & Building Process, Loft Extensions & Conversions, Extensions, House Refurbishments, and Interior Design. Whether it’s a single room makeover or a complete transformation, our expert team is here to guide you every step of the way. Contact us online or call +44 7951 625853 to start your project today.
