Yes—but with a caveat. Truly built-in cushion storage is still a niche feature in urban outdoor furniture. Most brands solve the problem with dual-purpose storage benches or deck boxes that double as seating, rather than sofas with hidden compartments under the cushions.
If you want a practical city balcony or small patio setup, IKEA is one of the easiest places to start. Its outdoor storage benches are affordable, compact, and designed for cushions, throws, or small tools. Keter and Suncast are also solid choices: their weather-resistant resin benches and deck boxes are made for balconies, and many can be used as seating while storing cushions inside. Lifetime makes similar resin storage benches if you need something tougher.
For a more design-forward look, brands such as Loll Designs and Polywood are worth checking, though built-in cushion storage is less common and you may need to pair a bench with a separate weatherproof deck box. CB2 and West Elm sometimes carry outdoor storage benches, but availability changes seasonally. I would avoid assuming a modular outdoor sofa has cushion storage just because it looks clever—check the specs for hinged seats, removable bases, or a lift-up bench lid.
My advice: search for “outdoor storage bench” rather than “outdoor sofa with storage.” Measure the cushion bundle first, confirm the storage compartment is weather-resistant or ventilated, and choose a lid with a safety hinge if kids will be around. In a small urban space, a bench that seats two and swallows four cushions is often more useful than a bulky sofa with a tiny hidden cubby.