During the day, yes. At night, no. When IR night vision activates in low light, the infrared LEDs reflect off the glass and bounce straight back into the lens. The result is a white-out image that is completely unusable. This is why mounting a camera behind a window is not a substitute for a proper outdoor installation.
This is one of the most common mistakes people make with DIY cameras. They place a camera on a windowsill or stick it to the glass with a suction mount, and it works fine during daylight. Then at night the image turns into a bright white glare and records nothing. Doberman sees this regularly when replacing failed DIY setups.
Some cameras offer an option to disable the IR LEDs, which removes the reflection problem. But then the camera has no night vision at all and relies entirely on ambient light - street lamps, porch lights, or nearby lighting. In most residential settings, this produces a dim, grainy image that is not useful for identification.
The proper solution is to mount the camera outside. Outdoor-rated PoE cameras are designed for exactly this. They are weatherproof, have built-in IR that works unobstructed, and with a wired connection they do not depend on Wi-Fi signal strength through the wall. Doberman runs the cable through the wall or soffit and mounts the camera externally so you get full 24-hour coverage.
There are rare cases where indoor mounting behind glass makes sense - for example, a camera covering an internal shop window display where the area is well-lit at night. But for general home security, if a camera is behind glass, it is not doing its job after dark.
Can a security camera work through a glass window?
In daylight, yes. A camera will see through a clean window perfectly well while there is enough natural light. The trouble starts after dark. The moment light drops and the camera switches to infrared night vision, the IR light bounces off the glass and straight back into the lens, washing the picture out to a flat white. So a camera behind a window does its job for roughly half the day and goes blind for the other half - which is the half that matters most, because most break-ins happen at night.
Is there a security camera that works through windows?
No camera fully solves this while it is sitting behind glass, because the problem is physics rather than the camera itself. Any camera with active infrared will reflect off the window after dark. A camera with the IR LEDs switched off avoids the glare, but then it has no night vision and leans entirely on whatever outside lighting you have. In most homes that leaves a dim, grainy image that is no good for recognising a face or a number plate. Rather than hunting for a special through-glass model, the reliable answer is to get the camera onto the outside wall.
What is the best camera to see through a window?
The best result does not come from a particular camera - it comes from not shooting through the window at all. A weatherproof outdoor camera mounted on the wall gives you clean footage around the clock, with its infrared working unobstructed and a wired connection that does not have to fight its way through the glass and brickwork. If a camera genuinely has to stay indoors, the least-bad option is one that lets you turn the IR LEDs off, placed in a room that stays well lit through the night. Even then it will struggle next to a professional-grade outdoor camera, so we only suggest it where an external mount truly is not possible.
How do I get my security camera to work through a window?
If a camera has to stay behind glass, there are a few things that cut the night-time glare:
Turn off the infrared or night-vision mode so the LEDs stop firing into the glass. Push the lens right up against the window so there is no air gap for reflections to form in. Kill the light sources behind the camera - switch off room lights and close any internal door that throws light onto the window. Give both sides of the glass a clean while you are there, since dust and condensation scatter what light there is.
These steps reduce the reflection, but they do not remove it, and turning off the IR costs you most of your night vision in the bargain. Mounting the camera outside is still the better fix because it takes the glass out of the equation completely. When Doberman replaces a failed window setup, we run the cable through the wall or soffit and fit an external bullet camera, so there is nothing for the IR to bounce off.
Is it legal to have a camera pointing out of your window?
Yes, pointing a camera out of your own window is legal. The thing to be aware of is what it captures. If the camera only covers your own property, domestic CCTV is treated as a private matter. But if it captures areas beyond your boundary - a neighbour's garden, a shared driveway, a footpath or the street - the Information Commissioner's Office (ICO) says your system falls within data protection law.
In practice that means a few sensible responsibilities: put up a sign letting people know recording is taking place, keep footage only as long as you actually need it, and respond if someone asks for a copy of recordings of themselves. None of this stops you having the camera. It just means using it responsibly and, where you can, angling it so it covers your property rather than the whole street. When we plan a system, Doberman positions cameras to cover your own boundary and entry points first, which keeps the footage useful and keeps you on the right side of these rules.