How Many Windows Should a House Have? The Ultimate Guide to Natural Light, Style & Comfort
Ever walked into a home that just feels right—bright, airy, and comfortable from the moment you walk in? More often than not, the magic comes down to smart window design: the right number of windows for your house, and where you put them. Whether you’re renovating, building, or just looking to boost natural light, you’re probably wondering, “How many windows should a house have to get that perfect balance?” Today, we answer this question.
I’ll walk you through everything you need to consider when planning windows for house projects—from how to balance sunlight, ventilation, privacy, and energy savings, to common mistakes to avoid. I’ll also show why choosing quality aluminium windows makes all the difference for comfort and style. And if you need expert advice, Ross’s Discount Home Centre is Perth’s trusted name for windows and doors, with solutions for every room and budget.
How Many Windows Does the Average House Have?
How many windows should a house have? There’s no strict rule, but looking at real homes across Perth and Australia gives us a good benchmark. Most modern homes have far more glass windows than older properties, thanks to today’s open-plan living and a love of natural light.
On average, most homes in Perth have between 10 and 20 windows, though this varies depending on home size, layout, and glazing style:
Average Number of Windows by Home Type
| Home Type | Typical Window Count | Notes |
|---|---|---|
| 3×2 home (3 beds, 2 baths) | 10–12 windows | Enough for good light in each room, plus a couple in the main living area |
| Family home with open-plan living | 15–20+ windows | Extra glass doors and large feature windows in living areas |
| Small apartment or unit | 4–8 windows | Prioritises light in bedrooms and living space |
Window design has come a long way. With more homes using floor-to-ceiling glass, wide openings, and stacking doors, the “average” is shifting. What matters most is balancing form and function—lighting your home in a way that suits your lifestyle, layout, and energy goals.
TL;DR: Most homes in Perth have between 10 and 20 windows, but the ideal number depends on your layout, lifestyle, and how much natural light you want. Focus on getting the right balance of window size, placement, and glass for a bright, comfortable home—rather than chasing a “magic” number.
Why The Number of Windows Matters: Comfort, Light & Value
Getting the number and placement of windows right is one of the biggest factors in making your home feel comfortable and inviting. Too few, and rooms feel dark or stuffy; too many, and you risk overheating or sacrificing privacy. Well-planned glass windows flood your home with natural light, boost your mood, and can even help cut down on heating and cooling costs. Window size and positioning make all the difference to your home’s look, feel, and long-term value.
Modern aluminium window frames are a smart, low-maintenance choice—perfect for busy families and anyone who wants good looks without the upkeep. Whether it’s a living room that soaks up the morning sun or a kitchen that always feels fresh, thoughtful window planning pays off in comfort and everyday enjoyment.
TL;DR: Having the right number of windows in a house ensures natural light, airflow, and a welcoming home—all while boosting value and reducing bills.
Key Factors That Decide How Many Windows a House Needs
There’s no magic formula for getting the perfect number of windows in a house—it comes down to matching your home’s needs, layout, and lifestyle. Here’s what to consider when planning the windows for your house:
Room Size & Function
Think about the purpose and size of each space. The average window size might differ for bedrooms, living rooms, or kitchens, but every room needs enough glass area to feel comfortable. By law, bedrooms must have at least one window, but living areas often benefit from multiple windows for natural light and airflow. Kitchens and bathrooms, meanwhile, need a mix of privacy and ventilation, often with smaller or frosted glass windows.
Orientation & Natural Light
Which way do your windows face? In Perth, having more windows on your home’s north-facing walls brings in the best natural light and helps with year-round comfort. East and west windows let in the morning and afternoon sun—plan wisely to avoid overheating. A thoughtful mix of window direction and placement ensures bright, pleasant living spaces all day long.
Ventilation & Airflow
Windows and doors play a huge role in keeping your home fresh. For the best cross-ventilation, consider having at least two windows on opposite sides of a room. Sometimes, more (but smaller) windows give better airflow than one big window, especially in bedrooms or hallways.
Privacy, Views & Home Style
Balance your love of glass windows with a need for privacy. Frosted panes, high windows, or clever placement can give you both natural light and peace of mind. Style-wise, modern and contemporary homes often feature larger or multiple windows, while traditional homes might stick with symmetrical placement for that classic look.
Energy Efficiency & Climate
When planning your windows and doors, energy efficiency is just as important as aesthetics or light. Options like double glazing, low-E glass, and quality seals can make a big difference to thermal comfort and energy bills. Jason Windows—our trusted supplier—offers energy-efficient aluminium windows that help keep Perth homes cooler in summer and warmer in winter. For most projects, aluminium window frames are the go-to for their durability, low maintenance, and excellent insulation options.
For more on what sets Jason Windows apart, check out our breakdown: 5 Reasons to Choose Jason Windows.
Common Window Planning Mistakes & How to Avoid Them
It’s easy to make mistakes when planning windows for your home—some can lead to dark, uncomfortable spaces, while others might cost you more in the long run. Here are the most common pitfalls (and how to dodge them):
- Too Few Windows: Not enough glass windows will leave your home feeling dark, stuffy, and closed in. Always plan for sufficient light and airflow.
- Too Many Windows: Going overboard can create privacy issues, unwanted glare, and higher energy bills. Aim for balance to suit your climate and lifestyle.
- Ignoring Orientation & Airflow: Poor window placement misses the opportunity for natural cross-ventilation and optimal sunlight. Take advantage of your home’s position.
- Wrong Window Size or Height: Choosing windows that are too small, too big, or placed too high/low can affect comfort and aesthetics. Reference the average window size for each room type.
- Choosing the Wrong Frame Material: Timber might look classic, but aluminium window frames offer better durability and minimal upkeep—ideal for Perth homes.
- Measuring Incorrectly: If you’re replacing existing windows, getting the measurements wrong leads to costly headaches. Our How to Measure Doors & Windows guide will help you get it right the first time.
TL;DR: Plan your window size, number, and placement carefully—think beyond just looks to light, airflow, and energy efficiency. Choose aluminium windows for hassle-free durability, and always double-check your measurements when replacing existing windows.
Choosing the Right Windows for Every Room: An Overview
Selecting the right windows for each space in your house is about more than just letting in light—it’s about getting the perfect balance of ventilation, privacy, energy efficiency, and style. Whether you’re planning windows for your living room, bedrooms, kitchen, or bathroom, the ideal window will make every space more comfortable and functional.
Light, airflow, and privacy all play a part. In living areas, bigger glass windows create a sense of openness. Bedrooms often need a mix of light and privacy, while kitchens and bathrooms benefit from windows that boost ventilation and withstand daily moisture. Aluminium window frames are a popular choice throughout the house for their low maintenance and contemporary appeal.
For an in-depth look at choosing the perfect windows for each room—including tips on aluminium windows, glass options, and frame styles—see our article: How To Choose the Right Window For a Room.
TL;DR: Choosing the right windows for every room means considering light, ventilation, privacy, and style—see our detailed guide for expert tips and inspiration.
Product Spotlight: Ross’s Aluminium Windows
Ross’s Discount Home Centre is Perth’s go-to for aluminium windows—offering everything from sliding and awning windows to fixed panel and double hung options, all available in standard or custom sizes to suit any project. Aluminium windows remain the smarter option for Perth homeowners and renovators thanks to their low maintenance, modern appeal, and excellent energy efficiency. Plus, you’ll find a wide range of finishes and configurations to match your home’s look.
If you’re searching for the perfect windows for your house, don’t settle for less. Visit our windows and door display at 57 James Street in Guildford, or browse our online store to see our full selection of aluminium windows and doors, get friendly advice, and request a free quote.
Conclusion
Getting the right number of windows for your house—and planning their placement thoughtfully—makes all the difference to natural light, airflow, comfort, and your home’s long-term value. Whether you’re building new or renovating, the best results always come from considering your lifestyle, room sizes, and orientation, then choosing window styles that suit each space.
At Ross’s Discount Home Centre, we specialise in helping Perth homeowners get the most out of their renovation or build with quality aluminium windows, energy efficient glass, and a complete range of styles to suit every project.
Need advice on windows for your house, or want to see our range in person? Contact us today, drop by our Perth showroom, or browse our windows and doors category online for inspiration.
For more tips on selecting the perfect window for every room, see our window buying guide and check out our other related articles.
FAQs: How Many Windows Should a House Have?
Get answers to the most common window planning questions below—each tailored to help you make smart, confident choices for your next renovation.
