Build near oxygen first
The best first base is boring: close to the Lifepod, easy to return to, and supplied by starter resources.
Base parts
Subnautica 2 Base Parts
A practical index for Habitat Builder unlocks, rooms, corridors, hatches, power systems, storage, and vehicle-support pieces without pretending every recipe is final. Hotfix 3 adds one official cost fact: Interior Walls now cost one quarter of their previous price.
Early Access rule: base-part names, recipes, and unlock order can change. We can cite the Hotfix 3 Interior Wall reduction now; the rest of the table still waits for source-backed or in-game recipe checks.
Habitat Builder unlock
Public-guide leadTwo Habitat Builder scans at the Welcome Center route, then craft the tool before placing real base parts.
Rooms and corridors
Hotfix 3 watchStarter corridors, rooms, hatches, Interior Walls, and connection pieces. Hotfix 3 reduced Interior Wall costs to one quarter of their previous price; exact recipe rows still need current-build verification.
Power pieces
Route leadSolar placement, later hydroelectric or thermal planning, and power storage. Use source-backed route rules before recipe tables.
Storage and utility
Roadmap watchLockers, storage cache, fabricators, processors, and support modules that affect co-op base flow.
Vehicle support
Roadmap watchTadpole Dock, Vehicle Fabricator, docking clearance, module support, and charging behavior.
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
Do not fill every flat patch. Public base-location guidance calls out leaving room for later vehicle support.
Recheck Interior Walls
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
Roof-mounted solar rules, turbine routes, and later power systems matter more than cosmetic layout.
Label recipe certainty
If a recipe or unlock order isn't verified in the current build, leave it as Route lead instead of printing a final cost.
Tracked base-part names
These are the small building and station terms currently worth tracking from public routes and external demand signals. They stay grouped here until source-backed recipes or standalone value justify deeper pages.
Interior Wall
Hotfix 3 officialUnknown Worlds reduced Interior Wall costs to one quarter of their previous price in Hotfix 3. Keep exact ingredient rows pending until the current build is checked in-game.
Biolab
Public-guide leadWelcome Center / DNA Modification route term. Use it to connect biomods, Bio Lab searches, and Bioscanner progression without copying external building recipes.
Basic Battery Terminal
Route leadExternal database-style pages expose it as a base utility term, while our map notes already include Power Cell Terminal-style scans at Camp One. Keep exact station naming and recipe cost pending.
Bioreactor
Public-guide leadThe northeast wreck route is already marked as a high-value scan stop that may include Bioreactor context. Verify current station text before printing costs.
Current Generator
Route leadUseful for current-side base power searches and external-search overlap. Treat output, battery behavior, and recipe as current-build checks.
Dive Elevator
Source watchVisible in external building coverage, but not yet strong enough for our final base-part list. Wait for official, public-guide, or in-game support before promotion.
Room / Corridor / Growbed
Route leadSupport the broad base-building intent today; exact unlock order, size variants, and recipe rows need current-build station checks.
Related base routes
Base Building Guide
Habitat Builder scans, first base placement, materials, and power setup.
Crafting
Station families, recipe cautions, and progression tiers.
Recipes
Recipe-family index with source notes instead of unsupported costs.
Interactive Map
Base spots, resource leads, source notes, and source-labeled markers.
Base Parts FAQ
Is this a complete Subnautica 2 base parts list?
No. It is a curated base-parts hub for Early Access. Exact part lists and recipe costs should be promoted only after current-build verification.
Why not publish every room and module now?
Base modules are patch-sensitive and some external database-style pages appear to expose game-data-derived entries. We use those as demand signals, not as copyable source data.
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. This page does not publish a full recipe table until current-build verification catches up.