If you’re furnishing a rooftop terrace in the city, I’d start by budgeting for the whole seating group, not one chair at a time. For a decent set — say a three-seat sofa, two lounge chairs, and a coffee table — I’d expect to spend about $1,500 to $3,500. That’s the realistic middle range for weather-resistant materials, decent cushions, and a style that won’t look beaten up after a season or two.
You can go lower. A basic four- or five-piece set might run $700–$1,200 if you shop end-of-season sales or choose powder-coated steel with simpler cushions. It can work, especially on a covered terrace, but check the finish, weight, and warranty. On an exposed rooftop, cheap furniture often costs more over time because cushions fade, frames rust, or lightweight chairs blow around.
At the higher end, $4,000–$8,000+ gets you better aluminum or teak, stronger cushions, nicer tables, and often better design and durability. Custom modular seating can go beyond that. If you’re in a walk-up building or a high-rise with tight elevator access, add delivery, hoisting, and assembly — that can easily add $150–$600 or more in a city. Don’t forget covers, storage, weighted bases, an outdoor rug, and lighting; those extras can add $300–$1,000 depending on how finished you want the space.
My practical advice: aim for the $2,000–$3,000 range for a good-looking, hard-working set. Spend extra on the frame and cushions, keep the layout flexible, and buy pieces that are wind-friendly and easy to cover. That’s usually the sweet spot for an urban rooftop that needs to look good and survive real weather.