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 official or in-game recipe checks.
Habitat Builder Habitat Builder unlock
Route leadTwo 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
Route leadSolar placement, later hydroelectric or thermal planning, and power storage. Use official or in-game route rules before recipe tables.
Storage 
Processor 
Biolab Storage and utility
RoadmapLockers, storage cache, fabricators, processors, and support modules that affect co-op base flow.
Dock 
Fabricator 
Tadpole Vehicle support
RoadmapTadpole 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
Do not fill every flat patch. Public base-location guidance calls out leaving room for later vehicle support.
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
Roof-mounted solar rules, turbine routes, and later power systems matter more than cosmetic layout.
Tracked base-part names
These building and station entries connect the current base routes, power systems, storage, and vehicle support pages.
Interior Wall
Hotfix 3 officialUnknown Worlds reduced Interior Wall costs to one quarter of their previous price in Hotfix 3.
Biolab
Route leadWelcome Center / DNA Modification route term. Use it to connect biomods, Bio Lab searches, and Bioscanner progression without copying external building recipes.
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 route notes instead of unsupported costs.
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.
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 game 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.