Build a +1 Obby
Build a +1 Obby: Build With Friends Start Time, Countdown
Build a +1 Obby is a building-sandbox experience on Roblox where the goal is to construct your own obstacle course. You buy ASMR-style blocks and props from an in-game shop, place them down at your base to piece together a course, and earn money as other players run it — the more popular your obby, the more it pays out. Built by Aeolian Harp, it has grown into one of the platform’s busier creation games, with roughly about 6,000 people building and playing at any given moment.
Across its lifetime the experience has pulled in about 2,900,000 visits and sits at about 9,000 favorites. This page covers what’s scheduled next inside the game — the current and upcoming in-game events, when they run, and what the developer has said to expect from each.
Right now the headline item is Build With Friends, a new-content event set for the weekend of Saturday, September 5. We update this page as the schedule changes; the exact start times and windows are shown in the schedule below.
Play Build a +1 Obby on Roblox ↗
Upcoming events1 scheduled
BUILD WITH FRIENDS
YOO
Sep 5, 4:00 PM – Sep 6, 4:00 PM ET
Players collaborate to build bases with new flight mechanics and gameplay improvements.
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Current and upcoming events
Build With Friends
Build With Friends is a new-content update centered on co-op building. According to the developer’s own event notes, it lets players collaborate on the same base together, adds a fly mode to move around while placing pieces, and ships a set of quality-of-life improvements to smooth out the building experience. In short, it turns the normally solo job of laying out an obby into something two or more people can work on side by side.
The event runs as a 24-hour window, opening at 4:00 PM ET on Saturday, September 5 and closing at 4:00 PM ET on Sunday, September 6. In other zones that start time lands at 3:00 PM CT, 1:00 PM PT, and 8:00 PM UTC (9:00 PM BST). Interest has been strong ahead of the date, with about 5,500 players already signaling they plan to jump in — a sizable share of the game’s usual concurrent crowd, which suggests the co-op building push has landed with the existing player base.
If you want to be building together the moment it opens, aim for the start time above rather than dropping in partway through — the full window and exact countdown are listed in the schedule near the top of this page.
Frequently asked questions
When is the next Build a +1 Obby event?
The next scheduled event is Build With Friends, set for Saturday, September 5. It’s the only event on the calendar as of September 3, and we’ll add new entries here as the developer announces them.
What time does Build With Friends start?
It begins at 4:00 PM ET on Saturday, September 5 (3:00 PM CT, 1:00 PM PT, 8:00 PM UTC / 9:00 PM BST) and stays open for 24 hours, ending at 4:00 PM ET on Sunday, September 6.
What happens during Build With Friends?
The developer describes it as a co-op building event: you can collaborate on a base with other players, use a new fly mode to get around while placing pieces, and take advantage of a batch of quality-of-life improvements added alongside it.
How many players does Build a +1 Obby have?
The experience is drawing about about 6,000 concurrent players, and it has recorded about 2,900,000 total visits along with about 9,000 favorites over its lifetime.