Home Sunlight Calculator | Will It Be Bright?

Q: Can I trust listing photos to judge natural light?

Usually no. Listing photos are taken at flattering times, lights are on, and edits are common. Orientation and sun timing give you a cleaner read before a tour.

Q: Is south-facing always the best choice?

South-facing homes are strong for all-day light, but layout still matters. Trees, neighboring buildings, and your exact unit position can change the result.

Q: Does this work for apartments and condos?

Yes. After the address lookup, choose apartment or condo and select front, back, left, or right so the estimate matches your unit.

Q: What does low confidence mean?

It means map data was thin, so orientation is estimated. Use the slider and satellite view to dial in the direction.

Q: Can I compare homes side by side?

Yes. Add up to four addresses, compare them in one view, and export a PDF report to share.

Calculating sun angles

What are you looking at?

Relative to the street, which side is your unit on?

My Shortlist

Three steps

How it works

No sign-up. No guessing. Paste an address and get a sunlight read in seconds.

Paste an address

Street address, Zillow link, Redfin URL. We'll find it.

We figure out the sun

Which way does the building face? Where does the sun hit at 8am vs 4pm? What about January?

Get a brightness grade

Excellent, Good, Fair, or Limited. Plus room-by-room predictions and a PDF for your agent.

Browse Zillow or Redfin? Chrome extension listing coming soon—light grades on every listing.

FAQ

Questions we hear all the time

The short answers, before you ask your agent.

Can I trust listing photos to judge natural light?

Usually no. Photos get shot at flattering times, lights are on, edits happen. Orientation and sun timing are less easy to fake.

Is south-facing always the best choice?

South-facing is strong for all-day light. Then reality shows up. Trees, nearby buildings, and your exact unit position can change the feel fast.

Does this work for apartments and condos?

Yes. Pick apartment or condo after lookup, then choose front, back, left, or right so the estimate matches your unit.

What does low confidence mean?

Map data was thin, so direction is an estimate. That is why the slider and satellite link are right there.

Can I compare homes side by side?

Yes. Add up to four addresses, compare them in one screen, then export a PDF and send it to your agent.

Sunlight guides

Deep dives on orientation, direction, and what it means for your home.

Best time to tour

Detection Confidence

Your day in this home

Adjust orientation

180°

This shows the building's street-facing direction. Use Satellite View below to double-check.

I care most about:

Sunlight through your windows

6am9am12pm3pm6pm9pm

Sun altitude through the day