Various polls that I've done indicate that roughly half of real estate photographers use small flashes in their shoots. I feel particularly qualified to talk about how people try to avoid using flash because even though I purchased my first flash (an SB-26) for real estate photography work in about 1995, I managed to avoid learning how to use it effectively until early 2008 when I met Scott Hargis at a workshop we did together in Seattle.
Everything I know about flash I learned from Scott. I was so impressed with Scott's system for Lighting Interiors with small flashes that I convinced him to write it down. That eventually became his Lighting Interiors e-book and later evolved into his Lighting For Real Estate Photography Video Series. The reason that the little post that Scott and I put together back in July of 2007 has become one of the most-read posts on this blog is that it distills the small manual flash system down into 890 words. This is fundamental information and eventually if you want to do the highest quality work possible in interiors photography you need to use some or all of Scott's system.
What about the other half of real estate photographers who aren't using small manual flashes? They are shooting brackets and processing them with Exposure Fusion or HDR tone mapping software. However, the polls I've done in the past indicate that even the majority of real estate photographers that shoot brackets also use at least one small flash. Why? Because it helps control some of the color side effects of processing brackets that only use ambient light. For example, one benefit of using a flash when shooting brackets is that the flash will make white woodwork look white and crisp and other colors more accurate.
Many start out using no flash, shooting brackets because it seems like a shortcut. Learning Scott's system has a learning curve to climb. There's more stuff you have to carry. People seem to have a natural fear of flash. I know; for several years, I would only shoot our listings at twilight just so I didn't have to use flash! One listing client was having a dinner party that I had to work around as I was shooting their home. Lucky for me they were good sports about me shooting during their dinner party!
There are some fundamental techniques that will get you started moving towards using small flash. You can do all of these while still shooting brackets:
So using a single off-camera flash to shoot brackets is a great way to ease into becoming more comfortable with flash. Try it, I think you are going to like the results!