Base Building Guide
Subnautica 2 base building starts once you scan and craft the Habitat Builder. This guide sticks to the launch-week facts we can support: where to unlock the tool, why your first base should sit near the Lifepod, and how to power it with Solar Panels before planning a larger Tadpole-ready habitat.
Tested in the Early Access launch build, May 14 2026. Last updated .
The unlock chain
Base building is gated by the Habitat Builder tool. PC Gamer's launch guide gives the practical route: craft a Scanner, swim to the Welcome Center southeast of the Lifepod, scan two Habitat Builder tools there, then craft your own Habitat Builder at the Fabricator.
Do not plan around exact hull-integrity numbers here. If the current build exposes integrity, flooding, or collapse rules, those should be tested in-game and added as versioned data rather than copied from older Subnautica habits.
| Step | Current fact | Note |
|---|---|---|
| Habitat Builder unlock | 2 scans | Scan two Habitat Builder tools, with two available at the Welcome Center southeast of the Lifepod. |
| Habitat Builder craft | Tool recipe | PC Gamer lists 2 Titanium, 1 Glass, 1 Basic Battery, and 1 Copper Wire. |
| Starting pieces | Corridors first | Early builders may only have corridors at first; larger rooms are unlocked separately from data cards or scans. |
| Starter materials | Titanium / Quartz / Copper | These are the practical materials to gather before placing the first powered base pieces. |
| Expansion space | Leave clearance | PC Gamer specifically calls out leaving room underneath or nearby for a future Tadpole dock. |
Recipe and route details above are based on launch-week guide verification. Retest after major Early Access patches.
Power sources — what to use when
Solar Panels are the first practical power answer. PC Gamer also recommends thinking about natural currents, because the Hydroelectric Turbine becomes a more reliable option once unlocked.
| Source | Output | Sweet spot | Notes |
|---|---|---|---|
| Solar Panel | Early default | Shallow starter bases | Place Solar Panels on the roof to power the base and restore oxygen. Output drops at night, so shallow daytime bases are the safest first use. |
| Hydroelectric Turbine | Reliable once unlocked | Natural ocean currents | PC Gamer recommends building near currents because the Hydroelectric Turbine becomes a stronger long-term power option than night-limited solar. |
| Power Transmitters | Connector | Between turbine and base | Use these to connect remote power pieces back to your habitat when the current is not right beside the room. |
| Other reactors | Patch-sensitive | Later bases | Do not plan the first base around unverified reactor details. Add exact recipes and placement notes after current-build testing. |
Early-game default: roof-mounted Solar Panels on a shallow base. If you build near a current, you are setting yourself up for a better long-term power source later.
Minimum-viable first base — 5 steps
Do not over-design the first base. A powered hatch, a Fabricator, and storage near the Lifepod are enough for the first session. Full habitat planning is for after you have rooms, the Moonpool path, and stronger power.
- 1.Unlock and craft the Habitat Builder.
Craft a Scanner, scan two Habitat Builder tools at the Welcome Center, then craft the Habitat Builder at the Lifepod Fabricator.
- 2.Build near the Lifepod first.
Your pod remains free oxygen, storage, and backup crafting. A nearby base keeps the first resource loop short.
- 3.Place a simple corridor or room with a hatch.
Use whatever pieces you have unlocked. Rooms may require separate scans or data cards, so a corridor-based starter base is normal.
- 4.Add a Solar Panel on top of the room.
Solar Panels provide the first practical base power. Without power, your base does not solve the oxygen problem.
- 5.Leave space for a Tadpole dock and future power.
Build with expansion clearance and consider nearby natural currents for a later Hydroelectric Turbine setup.
Total build time varies by how quickly you find the Habitat Builder scans and starter materials. Keep the first loop short.
What not to claim without testing
Early Access guides need to separate launch facts from inherited Subnautica assumptions. Before publishing hard numbers, test them in the current build:
- Exact hull integrity values for foundations, windows, corridors, and depth.
- Flooding thresholds and whether modules break, disable, or only leak.
- Reactor recipes beyond the early Solar Panel and later Hydroelectric Turbine path.
- Moonpool clearance rules for Tadpole docking in cramped starter bases.
Safe wording: "Base systems can change during Early Access; verify exact structural and power numbers in the current build." That keeps the page useful without inventing precision.
Moving or deleting a whole base
If your starter base is in the wrong place, use the Refund Bases guide before you manually tear down every corridor. Refund Bases is the launch-week menu option for removing a whole base and getting building materials back in a temporary container.
Use normal Habitat Builder deconstruction for one module. Use Refund Bases only when the selected base really needs to disappear.
Common mistakes
- Skipping the Welcome Center scans. You need the Habitat Builder route before a real base makes sense.
- Building too far from the Lifepod. Your pod is still free oxygen and backup crafting while the base is tiny.
- Forgetting power. A base without Solar Panels does not solve oxygen or crafting reliability.
- Blocking future vehicle space. Leave clearance for Tadpole docking before the layout becomes expensive to rearrange.
- Publishing exact structural numbers without a test. Early Access patches can change build rules quickly.
Related pages
Refund Bases
Move or delete a whole base and recover building materials.
Crafting Stations
Where the Habitat Builder and base modules fit into the crafting chain.
First Hour Plan
When base building fits into your opening sequence.
Co-op Guide
Shared base planning, role splits, and the wall demolition workaround.