The business is currently held by MediaCom, which has worked with Hillarys Blinds since 2006 and successfully defended the account in another pitch two years ago.
Simon Dalby, the company's commercial director, is understood to be leading the review.
MediaCom has overseen media across the company's main brand, which produces conservatory blinds, awnings and shutters, as well as Web-blinds, an online operation launched in 2000. It has also worked on its B2B channel, Arena, which sells made-to-measure blinds to other manufacturers.
Hillarys Blinds allocates the bulk of its media spend to TV and door-drops, according to Nielsen. The remainder is split between direct mail, internet, press and radio activity.