The Importance of Clean Air and Ventilation in Your Extension

Gary Newell • 1 June 2024

At Jigsaw Construction Surrey, we're passionate about creating beautiful, functional extensions that transform your home. But a stunning extension isn't just about aesthetics – it's about creating a healthy and comfortable living environment. That’s why we prioritise proper ventilation and air quality in every project we undertake.


Why is Clean Air Important in Your Extension?

Believe it or not, the air inside your home can be [1]2-5 times more polluted than the air outside. This is because everyday activities like cooking, cleaning, and even breathing release pollutants into the air. In a poorly ventilated extension, these pollutants can become trapped, leading to a range of health concerns, including:

  • Respiratory problems like asthma and allergies
  • Headaches and fatigue
  • Eye irritation
  • Difficulty concentrating


The Benefits of Proper Ventilation in Your Extension

By incorporating a well-designed ventilation system into your extension, you can:

  • Reduce pollutants: Fresh air dilutes and removes harmful contaminants, creating a healthier environment for you and your family.
  • Control moisture: Proper ventilation helps prevent condensation and mould growth, which can damage your extension and trigger allergies.
  • Improve comfort: Fresh air circulation keeps the temperature and humidity levels comfortable, especially important in well-insulated extensions.
  • Boost concentration: Good air quality can improve focus and productivity, perfect for creating a home office in your extension.


Different Ventilation Options

In the UK, we have several ventilation options to consider for your extension, both natural and mechanical:


Natural Ventilation:
  • Windows: This is the most basic and cost-effective option. Strategically placed windows allow for fresh air to enter and stale air to escape. You can consider tilt-and-turn windows for more flexibility in controlling airflow.
  • Window trickle vents: These are small vents built into modern windows that allow for a constant trickle of fresh air, even when the window is closed. This helps maintain background ventilation, particularly important in new, energy-efficient extensions where gaps and cracks have been sealed.
  • Air bricks: These are bricks with built-in vents that allow air to enter and exit the building through the walls. They are most commonly used in older homes but can be incorporated into new extensions as well.


Mechanical Ventilation Systems:
  • Extractor fans: These are typically installed in kitchens and bathrooms to remove moisture and odours. They can be intermittent or continuous.
  • Continuous Mechanical Extract Ventilation (MEV): This system uses low-powered fans to continuously extract stale air from wet rooms like bathrooms and kitchens.
  • Continuous Mechanical Balanced Ventilation with Heat Recovery (MVHR): This is the most sophisticated option. MVHR systems extract stale air while simultaneously bringing in fresh air. They also recover heat from outgoing air and transfer it to incoming fresh air, improving energy efficiency. This can be a good option for larger extensions or those in areas with colder climates.


Choosing the Right Ventilation Option:

The best ventilation option for your extension will depend on several factors, such as the size and layout of the extension, the number of occupants, and your budget. Take a look at the building regulations for more information. 


Jigsaw Construction Surrey: Building Healthy Extensions

At Jigsaw Construction Surrey, we work closely with you to understand your needs and design an extension that prioritises both style and health. We can advise you on different ventilation options.

Investing in clean air and ventilation is an investment in your health and well-being. Let Jigsaw Construction Surrey help you create a beautiful and healthy extension you'll love for years to come.

Contact us today for a free consultation! https://www.jcs-ltd.co.uk





[1]
 https://www.cfpdirect.co.uk/news/20-shocking-facts-about-indoor-air-pollution/


by Lisa Woolnough 1 May 2026
Not sure how to choose the right builder? Discover expert tips to avoid stress, delays, and hidden costs on your Surrey renovation.
by Lisa Woolnough 20 April 2026
As the weather warms up and daylight stretches into the evening, many homeowners start looking at their outdoor space differently. That unused garden suddenly feels full of potential, whether it’s for relaxing, working, or entertaining. In 2026, one trend is leading the way in home improvement: garden rooms and outdoor living spaces . From stylish home offices to seamless indoor-outdoor extensions, these upgrades are no longer a luxury, they’re quickly becoming a must-have for modern living. If you’re considering a garden room in Surrey or exploring outdoor living ideas in the UK , here’s what you need to know before getting started. Why Garden Rooms & Outdoor Living Are Trending in 2026 Homeowners are rethinking how they use their space, and the garden is no longer an afterthought. Here’s why demand is growing: Flexible living - Garden rooms double as offices, gyms, or guest spaces Working from home - A dedicated garden office creates separation from the house Lifestyle upgrades - Outdoor kitchens and entertaining areas are increasingly popular Added property value - Well-built outdoor spaces can significantly boost appeal Combined with better weather in spring and summer, April is when these ideas start turning into real plans. Garden Rooms vs Extensions: What’s Right for Your Home? One of the most common questions homeowners ask is whether to build a garden room or extend their home. Garden Rooms Best for: Home offices Studios or gyms Additional flexible space Benefits: Usually quicker to build Often fall within permitted development Less disruption to your home Home Extensions Best for: Expanding kitchens or living areas Creating open-plan layouts Long-term structural changes Benefits: Fully integrated with your home Adds significant long-term value Ideal for larger transformations The Key Decision If you want a separate, flexible space , a garden room is ideal. If you want to transform how your home flows , an extension may be the better option. Many homeowners are now combining both, creating indoor-outdoor living spaces that connect seamlessly to the garden. Costs & Planning Considerations When planning a garden office build or outdoor living project , it’s important to think beyond the structure itself. Typical considerations include: Size and specification of the build Electrical connections and heating Ground conditions and access Materials and finishes Planning permission Many garden rooms fall under permitted development, but this depends on: Height and positioning Proximity to boundaries Intended use For larger builds or integrated outdoor spaces, planning approval may still be required. Starting early in spring gives you time to confirm all requirements before construction begins. Why Groundworks & Timing Matter A successful outdoor project starts below the surface. Proper groundwork is essential for: Stability and longevity Drainage and weather resistance Preventing future movement or damage April is an ideal time to begin: Ground conditions are improving after winter Weather is more predictable Projects can progress smoothly into summer Starting now ensures your space is ready when you want to use it most. Creating Seamless Indoor-Outdoor Living One of the biggest trends in patio and extension design is creating a natural flow between inside and outside. Ways to achieve this: Bifold or sliding doors opening onto patios Matching flooring levels between interior and exterior Covered outdoor seating areas Integrated lighting and landscaping The goal is simple: A space that feels connected, not separate. This approach works particularly well for: Kitchen extensions opening onto the garden Entertaining areas for summer Family-friendly, open-plan living Is a Garden Room Right for You? A well-designed garden room or outdoor space can completely change how you use your home. It’s not just about adding space; it’s about creating a better way to live, work, and relax . Whether you’re considering a garden room in Surrey , a garden office build , or a full indoor-outdoor transformation , the key is starting with the right plan. Start Your Outdoor Living Project with Confidence At Jigsaw Construction Surrey , we help homeowners create high-quality outdoor spaces built to last, from initial planning through to final finish. With the right groundwork, clear design, and expert construction, your garden can become one of the most valuable parts of your home. 👉 Get in touch today to start planning your garden room or outdoor living project.
by Lisa Woolnough 1 March 2026
Thinking about renovating your home this year? Discover why March is the perfect time to plan your home renovation and avoid delays before summer.
More posts