Blog | AV Architects + Builders

Engineering Light: Skylights, Clerestory Windows, and Sun Tunnels in Custom Homes

Written by JC Valenzuela | Sep 24, 2025 1:00:00 PM

Natural light does more than brighten a home. It affects your mood, your health, and even your energy costs. In custom home design, you have options beyond standard windows. You can shape light to create a comfortable and functional space that fits your lifestyle. Sunlight can make spaces feel more open, inviting, and alive. Conversely, poorly considered light can leave rooms feeling shadowy, cramped, and uncomfortable.

Many homeowners feel stuck with dark hallways, shadowy corners, or rooms that need lights on during the day. They think their floor plan or lot position limits what is possible. In reality, engineered daylighting solutions can bring sunlight into places you never thought could have it. When done right, it reduces the need for artificial lighting, improves energy efficiency, and elevates your home’s overall experience.

At AV Architects + Builders, led by Francisca and Tony Alonso, we promise to design homes that feel open, bright, and connected to the outdoors. Our focus is on solutions that work for your space and lifestyle, not one-size-fits-all fixes. We study sun patterns, interior layouts, and usage patterns to determine where daylighting features will be most effective.

We’ve helped clients achieve the perfect balance between brightness and privacy. By combining features like skylights and clerestories with sun tunnels, we’ve turned dim rooms into airy, welcoming spaces. Every choice is intentional, so light feels natural rather than forced. After reading this, you’ll understand the options available, how they perform in different situations, and how to choose what works best for your home.

The Architect House, Great Falls, Virginia, AV Architects + Builders, Photography by Maxwell Mackenzie

Skylights

Skylights are roof-mounted windows that bring daylight directly from above. They are ideal for spaces without exterior walls, such as interior bathrooms, hallways, or central kitchens. Modern skylights come in various styles: fixed, vented, flat, domed, or tubular. A vented skylight can allow natural airflow, reducing humidity in bathrooms or kitchens. Some skylights include blinds or diffusers to control brightness and prevent glare.

Choosing the right skylight depends on your roof pitch, the amount of sun exposure, and your heating or cooling goals. Skylights placed on southern-facing roofs can bring warmth during winter but may require shading in summer. Conversely, northern-facing skylights provide soft, consistent daylight throughout the year. Learn more about the pros and cons of skylights and how they can transform your interior.

For a direct comparison of skylights and other overhead options, see Skylight vs. Sun Tunnel.

Clerestory Windows

Clerestory windows are installed high on walls, usually near the roofline. They are excellent for bringing in daylight while maintaining privacy and usable wall space. Clerestories can also aid passive solar heating when oriented strategically, allowing low-angle winter sunlight to warm living areas while reducing heat gain in summer.

High-set clerestories are particularly effective in living rooms, bathrooms, and kitchens where wall space is limited but natural light is desired. Paired with lower-level windows, they can create layered daylight that fills a room evenly. Learn more about clerestories and skylights and their benefits in modern home design.

The Architect House, Great Falls, Virginia, AV Architects + Builders, Photography by Maxwell Mackenzie

Sun Tunnels

Sun tunnels, or tubular daylighting devices, channel sunlight from the roof into rooms without direct access to exterior walls. They are perfect for interior hallways, closets, bathrooms, and other small or enclosed spaces. The reflective tube amplifies and directs daylight, spreading it evenly across the room.

Sun tunnels are particularly valuable in dense urban areas or homes with complex floor plans, where adding large windows is impractical. See how sun tunnels compare to skylights and how they can provide light in the heart of a home.

Are There Other Tools?

Beyond skylights, clerestories, and sun tunnels, you can also explore:

  • Large sliding glass doors that connect indoor and outdoor living areas.

  • Transom windows above doors that introduce daylight without compromising wall space.

  • Light shelves that reflect sunlight deeper into a room.

  • Stained glass for filtered, colorful daylight that enhances mood and visual interest.

Stained glass adds filtered light with color and texture, creating visual interest and mood. It works well in entryways, bathrooms, or hallways where privacy is important. Rather than maximizing brightness, it shapes the quality of light to create ambiance.

The Astron House, Great Falls, Virginia, AV Architects + Builders, Photography by Maxwell Mackenzie

 

Creative Ways to Flood Interiors with Natural Light

  • Double-height spaces allow stacked windows for light at multiple levels.

  • Mirrors and glossy finishes bounce daylight deeper into rooms.

  • Corner glass installations capture sunlight from two directions.

  • Interior cutouts and pass-throughs share daylight across rooms.

  • Floor-to-ceiling glazing works best where privacy isn’t a concern, such as a garden-facing wall.

  • Glass railings in staircases and lofts let light pass through rather than block it.

  • Layered light entry using clerestory windows above standard windows captures light at different angles.

  • Skylights with diffusers or blinds allow brightness adjustment and glare reduction.

  • Light-colored ceilings and reflective finishes enhance illumination.

  • Seasonal planning ensures winter sunlight penetrates while summer overhangs provide shading.

For more ideas, see design strategies for bringing more natural light indoors.

Benefits of Engineering Light

  • Improves mood and reduces reliance on artificial lighting.

  • Enhances visual comfort by reducing glare and shadows.

  • Supports natural circadian rhythms for better sleep and productivity.

  • Can reduce energy costs when paired with geothermal or sustainable home systems.

  • Increases property value by creating bright, desirable spaces.

  • Encourages connection to the outdoors, improving quality of life.

The Vista House, Great Falls, Virginia, AV Architects + Builders, Photography by Maxwell Mackenzie

What If It Rains?

Modern skylights and sun tunnels are built to handle rain and extreme weather. Proper installation and high-quality materials prevent leaks, while some skylights feature rain sensors that automatically close during storms. Even on overcast days, daylighting features provide soft, diffuse light that keeps interiors bright without glare or excessive heat. Laminated or insulated glass options can reduce sound from rainfall while maintaining brightness.

How to Know What’s Right for Your Home

  • Identify rooms that lack natural light or feel dim throughout the day.

  • Consider privacy needs, views, and room usage.

  • Examine your home’s orientation, roof design, and structural layout.

  • Decide whether you want maximum daylight or softer, mood-focused lighting.

  • Consult with an architect who understands both aesthetic and technical daylighting requirements.

If you are building a new home, window planning and architecture parti guides can help you visualize sun paths and light distribution. In renovations, a daylighting assessment can uncover opportunities you may not have considered.

The Woodlands House, Great Falls, Virginia, AV Architects + Builders

Plan Your Light Strategy

Start by identifying the spaces you use most and how natural light could improve them. The AV Architects + Builders team, led by Francisca and Tony Alonso, can recommend tailored solutions for your home. We combine quiet home design principles with sustainable materials to make homes bright, efficient, and comfortable.

To explore options for your project, contact us here or visit our Learning Center.