Planning a home extension can be an exciting project that transforms your living space, increases functionality, and potentially boosts your property’s value.

However, it requires careful thought and preparation to ensure the end result is successful and stays within budget.

Dundee architect Jon Frullani in his Perth Road office. Image: Kim Cessford.

Dundee-based architect Jon Frullani has his office on Perth Road and specialises in everything from extensions and conversions to new-builds and commercial projects. Here he gives his top considerations when planning a home extension:

1. Legal and Regulatory Requirements

Prior to commencing any works, the first step is understanding the legal requirements.

In many cases, extensions require planning permission from your local council, especially if the changes are substantial. Some smaller extensions may fall under Permitted Development Rights, which means you won’t need formal permission.

This extension in St Andrews transformed the way the owners used their home. Image: Jon Frullani.

However, you’ll still need to meet Building Regulations, which govern safety, structure, and energy efficiency among other factors.

These regulations ensure the extension is safe to use and complies with modern standards.

2. Budgeting and Finance

Budgeting is a crucial part of any home extension. Start by estimating the total cost, including construction, materials, planning fees, professional services, and unexpected expenses.

It’s recommended to set aside a contingency of around 10% for unforeseen costs. The overall cost can vary depending on the size, complexity, and materials used in the extension.

Extensions give the opportunity for open plan living. Image: Jon Frullani.

Consider how you’ll finance the extension—whether through savings, remortgaging, or another funding source. Don’t forget to factor in VAT costs, which may apply to certain building works.

3. Design and Functionality

The design of your extension should be guided by your needs and the existing layout of your home. What is the purpose of the extension?

Whether it’s an additional bedroom, a larger kitchen, or an office, the design should reflect how you intend to use the space. Ensure that the extension flows well with the rest of the house and doesn’t disrupt the current layout.

This St Andrews extension opens the home up to the garden. Image: Jon Frullani.

Think about the functionality of the new space: Will you need additional storage? How will you access it from the rest of the house? Natural light and ventilation are also important considerations.

4. Hiring Professionals

For most home extensions, you will need to hire professionals, such as an architect, structural engineer, and builder.

An architect can help you design the extension and create detailed plans, ensuring it fits within planning regulations.

A Dundee extension that complements the home’s original character. Image: Jon Frullani.

A structural engineer may be required to ensure that the foundations and load-bearing walls can support the new structure. Finally, hire a reputable builder or contractor who has experience in home extensions and comes highly recommended.

5. Impact on Daily Life

Building an extension can be a lengthy and disruptive process. It’s essential to consider how the construction will impact your daily life.

Can you stay in the house while the work is being carried out, or will you need temporary accommodation?

This extension in Broughty Ferry has attractive timber cladding. Image: Jon Frullani.

Will there be noise, dust, and disruption to the use of your current space? Planning for these disruptions and communicating with your neighbours about potential inconveniences can help avoid conflicts during the build.

6. Sustainability

Finally, think about the environmental impact of your extension.

Incorporating energy-efficient features, such as insulation, triple-glazed windows, and sustainable materials, can make the space more energy-efficient and reduce running costs in the long term.

You might also want to consider renewable energy options like solar panels to make your extension more eco-friendly.

Planning a home extension involves careful consideration of legal requirements, budget, design, professional support, and practical matters.

By taking the time to plan and prepare for all these factors, you’ll be setting yourself up for a smoother and more successful project.

Whether you’re adding space for a growing family or enhancing your home’s functionality, the right preparation will ensure your extension meets your needs for years to come.