24 Things You Should Know about Building an Extension

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Are you considering expanding your living space and adding value to your home? Building an extension can be an exciting yet daunting venture. From envisioning the design to finding the right contractors, there are many factors to consider. In this comprehensive guide, we’ll walk you through 24 essential things you should know about building an extension. Whether you’re in London or beyond, these insights will help you navigate the process smoothly.

Assess Your Needs and Goals

Before you dive into the project, define your objectives. Do you need more living space, a new bedroom, or a larger kitchen? Clarifying your goals will guide your decisions throughout the process.

Plan Your Budget

Determine your budget early on. Consider all expenses, including design, permits, materials, labor, and unexpected costs.

Understand Local Regulations

Research local zoning regulations and building codes. Obtain the necessary permits before starting any construction.

Choose the Right Design and Build Contractors

Hiring experienced professionals is crucial. In London, consider reaching out to “Bohun One,” a reputable design and build contractor. Their expertise can streamline the process.

Focus on Functionality

Your extension’s design should align with your lifestyle. Think about how you’ll use the space and ensure it’s functional and practical.

Blend with the Existing Structure

Aesthetics matter. Your extension should harmonize with the existing architecture of your home.

Consider Natural Light

Design your extension to maximize natural light. Well-placed windows and skylights can create a bright and inviting space.

Choose High-Quality Materials

Opt for durable materials that will withstand the test of time. Quality materials also add value to your property.

Energy Efficiency Matters

Incorporate energy-efficient features, such as insulation, LED lighting, and energy-rated windows, to save on utility bills.

Think About Heating and Cooling

Plan the extension’s heating and cooling systems early in the design phase to ensure optimal comfort.

Review Drainage and Plumbing

If your extension involves plumbing, ensure proper drainage and connection to existing systems.

Set Realistic Timelines

Building an extension takes time. Be prepared for potential delays and plan accordingly.

Communication is Key

Maintain clear and open communication with your contractors throughout the project to avoid misunderstandings.

Get Multiple Quotes

Don’t settle for the first quote you receive. Shop around and compare prices to get the best deal.

Visit Past Projects

If possible, visit other extensions built by your chosen contractors. This can give you a sense of their work quality.

Create a Realistic Schedule

Work with your contractors to create a detailed project schedule. This will help you track progress and milestones.

Prepare for the Mess

Construction can be messy. Prepare your living space for disruptions and dust.

Anticipate the Unexpected

No matter how well you plan, unexpected issues can arise. Have a contingency fund to handle surprises.

Stay Involved

While contractors will handle the construction, stay involved in decision-making to ensure the project aligns with your vision.

Embrace Sustainable Practices

Consider eco-friendly options such as rainwater harvesting, solar panels, and sustainable building materials.

Prioritize Safety

Safety should be a top priority. Keep children and pets away from the construction area.

Inspect the Work

Regularly inspect the construction to address any concerns promptly and ensure quality workmanship.

Finishing Touches

The final details, such as paint, flooring, and fixtures, will bring your extension to life.

Enjoy Your New Space

Once the construction is complete, take the time to enjoy your newly expanded living area.


Building an extension is a rewarding journey that requires careful planning and execution. From envisioning the design to collaborating with skilled contractors like “Bohun One” in London, each step contributes to the success of your project. By considering these 24 key factors, you’ll be well-prepared to create a functional, beautiful, and valuable extension that enhances your home and lifestyle.

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