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The Two Most Important Things to Consider Before Embarking on a House Extension

як Peter Priskin (2024-05-28)

Embarking on a house extension is an exciting venture that can transform your living space, add significant value to your property, and cater to your changing needs. However, such a significant project requires careful consideration and meticulous planning. To ensure a smooth and successful extension, two primary factors stand out above all: comprehensive planning and selecting the right professionals. Let’s delve into these essential considerations to help you prepare effectively for your house extension project.

Comprehensive Planning: The Backbone of Your Extension

Planning is the most crucial step in any house extension project. It involves defining your needs, setting a budget, securing permissions, and considering the long-term impact of the extension.

Defining Your Needs

Understanding what you want to achieve with your extension is the first step. Are you looking to add an extra bedroom, expand your kitchen, or create a home office? Clearly defining your goals will help guide every other decision in the planning process.

Peter Priskin, owner of CATH Services, emphasizes, "A clear vision of your goals can streamline the planning process and ensure the final result meets your expectations."

Setting a Realistic Budget

Budgeting is a critical component of the planning phase. House extensions can be expensive, and it's essential to have a detailed understanding of all potential expenses, including materials, labor, design fees, and unexpected costs that might arise during construction.

According to Homebuilding & Renovating, the average cost of a house extension in the UK ranges from £1,000 to £2,000 per square meter, depending on the quality of materials and finishes (source: Homebuilding & Renovating). This figure can vary widely based on location, complexity, and size of the extension.

Securing Permissions

Before starting any building work, it’s crucial to secure the necessary permissions and ensure your plans comply with local building regulations. Most house extensions in the UK require planning permission from the local council, especially if they significantly alter the structure or appearance of the building.

Additionally, building regulations must be adhered to, ensuring the extension is safe and energy-efficient. Failing to secure these permissions can result in fines or being required to undo the work, adding unnecessary stress and expense to your project.

Long-Term Impact

While focusing on immediate needs is important, considering the long-term implications of your extension is equally crucial. Will the extension add value to your property? How will it affect your home's overall layout and flow? A well-planned extension should enhance the functionality and aesthetics of your home, making it more enjoyable to live in and potentially more attractive to future buyers.

Selecting the Right Professionals: The Key to Quality and Efficiency

The success of your house extension heavily depends on the professionals you choose to work with, including architects, builders, and possibly project managers. Choosing the right team ensures that your vision is brought to life efficiently and to a high standard.

Hiring an Architect

An architect can help transform your ideas into detailed plans and navigate the complexities of design, ensuring that your extension is both functional and aesthetically pleasing. They can also assist in securing planning permission and ensuring that your project complies with building regulations.

Selecting a Builder

Choosing a reputable builder is crucial for the quality and safety of your extension. Look for builders with proven track records and strong recommendations. Check for membership in professional bodies such as the Federation of Master Builders (FMB), which indicates a commitment to high standards and ongoing professional development.

Peter Priskin advises, "Working with experienced professionals who understand your vision and have a reputation for quality work is essential. Their expertise can help navigate potential challenges and ensure your project runs smoothly."

Communication and Collaboration

Effective communication and collaboration between you and your chosen professionals are vital. Ensure that there is a clear understanding of your expectations, budget, and timeline. Regular updates and open communication can help prevent misunderstandings and keep the project on track.

Considering the Impact on Daily Life

An often-overlooked aspect of house extensions is the impact on your daily life. Construction can be disruptive, noisy, and messy. It’s important to consider how you will manage this disruption, especially if you plan to live in the house during the construction period.

Discussing the timeline with your builder and setting clear expectations can help mitigate some of the inconveniences. In some cases, you might need to arrange temporary accommodation or adjust your routine to accommodate the construction work.

Thinking Long-Term

While it’s essential to focus on your immediate needs, it’s equally important to consider the long-term implications of your extension. Will the extension add value to your property? How will it affect your home's overall layout and flow?

A well-planned extension should enhance the functionality and aesthetics of your home, making it more enjoyable to live in and potentially more attractive to future buyers. Consulting with a real estate expert can provide insights into how the extension might impact your property's market value.


Embarking on a house extension is a significant undertaking, but with careful planning and the right team of professionals, it can be a rewarding investment that enhances your living space and adds value to your home. By focusing on comprehensive planning and selecting the right professionals, you can ensure that your extension project is successful and stress-free.

As Peter Priskin of CATH Services aptly puts it, "The foundation of any successful house extension lies in meticulous planning. Taking the time to plan thoroughly can save you time, money, and stress, ensuring your vision becomes a reality."

Remember, the more effort you put into the planning and selecting the right team, the smoother and more enjoyable your house extension journey will be.

  1. Homebuilding & Renovating: 
  2. Federation of Master Builders:
  3. CATH Services: