The ISS Retires in 2030. Its Replacements Are Still Being Built

NASA plans to deorbit the International Space Station in 2030, ending three decades of continuous human presence in low Earth orbit aboard a single, government-run outpost. What replaces it is meant to be a set of privately owned, commercially operated stations — and as of 2026, every one of them is still under construction, with timelines that leave little room for delay.

The four contenders

Vast's Haven-1 is the most compact approach: a single module, roughly 10 meters tall with 45 cubic meters of habitable volume, designed to host a crew of four for two-week missions and targeted for launch in 2027. Blue Origin and Sierra Space's Orbital Reef pairs a more traditional structure with Sierra Space's inflatable "LIFE" habitat module, aiming to support four astronauts and also targeting 2027, though industry watchers widely expect that to slip. Axiom Space is taking a hybrid approach — attaching its first module, Axiom Hab One, to the ISS itself in 2026 under a firm-fixed-price NASA contract, operating there, then detaching before the ISS deorbits to become a free-flying station supporting up to eight crew. Voyager Space and Airbus's Starlab is the largest single module of the group, roughly 17 meters, designed for 4 to 8 crew at 500 km altitude, but carries the latest target date of the four: 2029.

Why the timeline is the actual story

Every one of these four programs is targeting a launch date between 2027 and 2029 — all before the ISS's planned 2030 retirement, but with essentially no slack if any of them slips, which multi-module space stations built by relatively young companies have a well-established tendency to do. A single serious delay at any of the four leading candidates would shrink, not eliminate, the number of options available when the ISS actually comes down.

A single serious delay at any of the four leading candidates would shrink, not eliminate, the number of options available when the ISS actually comes down.

Why NASA is betting on multiple companies at once

NASA's approach deliberately avoids picking one winner. Axiom holds a firm-fixed-price contract, while Orbital Reef and Starlab operate under Space Act Agreements — different funding structures for the same underlying goal. Rather than building or funding a single successor outpost the way it built the ISS, the agency is spreading seed funding and eventual purchase commitments across multiple commercial developers, treating low Earth orbit habitation the way it treats commercial cargo and crew transport: as a service NASA buys from private companies rather than infrastructure it owns outright. That spreads the risk of any single company's failure or delay, at the cost of not controlling which design actually succeeds.

What's actually at stake

If no commercial station is ready by 2030, the practical consequence isn't necessarily a total gap in American human spaceflight in low Earth orbit — NASA could extend ISS operations, though the station's aging hardware makes that progressively riskier and more expensive with each additional year. It would, however, mean ceding continuous low Earth orbit presence, at least temporarily, at a moment when China's Tiangong station has been continuously crewed since 2022 and isn't going anywhere.

The honest caveat

None of these four stations has flown a single crewed mission yet. Every timeline in this piece is a company's own stated target, not a demonstrated launch date, and every major crewed space station built to date — including the ISS itself — has taken longer and cost more than its original plan. The 2030 deadline is fixed. The stations meant to meet it are not yet proven.