Build near oxygen first
Build close to the Lifepod while resources are scarce so you can return for air, supplies and fabrication.
Base parts
Subnautica 2 Base Parts
Build a usable shelter first, then add power, storage and production. Choose generators for the site, leave space for vehicle docking, and add charging stations before long exploration trips.
Build priority: Reserve construction materials for your next room and its power supply before adding decorative pieces.
Habitat Builder Habitat Builder unlock
Build sequenceTwo Habitat Builder scans at the Welcome Center route, then craft the tool before placing real base parts.
Corridor 
Hatch 
Wall Light Rooms and corridors
Hotfix 3Starter corridors, rooms, hatches, Interior Walls, and connection pieces. Hotfix 3 reduced Interior Wall costs to one quarter of their previous price.
Solar 
Hydro 
Terminal Power pieces
Build sequenceUse solar in suitable light, turbines in natural currents, or thermal generation near heat. Connect supply to the base and reserve power for charging.
Storage 
Processor 
Biolab Storage and utility
Current recipesPortable Locker uses 4 Titanium. The Processor uses 2 Titanium, 1 Mild Acid and 1 Copper Wire after one full Processor scan.
Dock 
Fabricator 
Tadpole Vehicle support
Vehicle setupTadpole Dock, Vehicle Fabricator, docking clearance, module support, and charging behavior.
Base layout Refund and relocation
Live guideMove a bad first base without turning every misplaced corridor into a long manual cleanup.
Base planning rules
Leave vehicle clearance
Leave room for the Tadpole and its installed chassis to approach and leave the dock. A blocked dock cannot provide a usable vehicle route.
Use Hotfix 3 Interior Wall costs
Hotfix 3 reduced Interior Wall costs to one quarter of the previous price, so older base-material estimates can be too expensive.
Separate power from decoration
Choose power sources for the site and leave enough supply for active facilities before adding decoration.
Useful facilities and construction changes
These building and station entries connect the current base routes, power systems, storage, and vehicle support pages.
Related base routes
Base Power
Match generation, transmission and storage to your site and demand.
Charging Stations
Use separate terminals for tool batteries and vehicle Power Cells.
Bioreactor Fuel
Prepare a repeatable fuel supply before depending on a reactor.
Base Locations
Compare starter, mining and Alien Ruins outposts.
Base Building Guide
Habitat Builder scans, first base placement, materials, and power setup.
Crafting
Station families, material budgets, and progression tiers.
Recipes
Recipe costs, crafting stations and ingredient chains.
Interactive Map
Base spots, resource leads, route notes, and map markers.
Base Parts FAQ
Is this a complete Subnautica 2 base parts list?
No. It covers the early Habitat Builder route, rooms, corridors, power, storage, utilities, and vehicle support.
Does a Power Cell Terminal replace a generator?
No. The terminal charges Power Cells using the base power supply. Build and connect generation first, then keep enough available power for the terminal and other facilities.
What should I build first?
Unlock the Habitat Builder, place a small powered base near safe oxygen access, add storage, then plan power and vehicle clearance before expanding.
Did Hotfix 3 change base building costs?
Yes. Unknown Worlds says Interior Wall costs were reduced to one quarter of their previous price.
Storage and production costs
Ingredient quantities use PC build 128456 recipe data. Follow each recipe link for its unlock conditions and raw-material planning.
| Recipe | Station | Ingredients and output |
|---|---|---|
| Portable Locker | Habitat Builder | 4 Titanium → 1 Portable Locker with Habitat Builder access |
| Processor | Habitat Builder | 2 Titanium + 1 Mild Acid + 1 Copper Wire → 1 Processor with the Habitat Builder |