Short answer: glass railings cost more upfront than wood or metal but require far less maintenance over time and open up sightlines, which is why they're popular for decks, stairs, and pool areas.
Cost comparison
Glass railings sit at a premium compared to standard wood or metal balusters, mainly due to the tempered or laminated glass required for safety and the specialized hardware to hold panels securely.
Code requirements
Nearly all residential codes require tempered or laminated safety glass for railings, along with minimum height requirements — always confirm with your local building department before ordering.
Maintenance reality
Glass needs occasional cleaning to stay looking good, but doesn't rot, rust, or need repainting the way wood and some metal railings eventually do.