S2 Subnautica 2 Wiki
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.
Official Unknown Worlds Subnautica 2 base-building image used for base parts, rooms, and power planning.
Subnautica 2 Habitat Builder crafted after the Welcome Center scan route. Habitat Builder

Habitat Builder unlock

Route lead

Two Habitat Builder scans at the Welcome Center route, then craft the tool before placing real base parts.
Subnautica 2 Corridor base-part icon. Corridor
Subnautica 2 Hatch base-part icon. Hatch
Subnautica 2 Large Wall Light base-part icon. Wall Light
Build pieces

Rooms and corridors

Hotfix 3 watch

Starter 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 in-game confirmation.
Subnautica 2 Solar Panel render for starter base power. Solar
Subnautica 2 Hydroelectric Turbine render for later base power. Hydro
Subnautica 2 Power Cell Terminal render for base power storage. Terminal
Power chain

Power pieces

Route lead

Solar placement, later hydroelectric or thermal planning, and power storage. Use official or in-game route rules before recipe tables.
Subnautica 2 Portable Storage render for early storage planning. Storage
Subnautica 2 Processor render for base utility planning. Processor
Subnautica 2 Biolab icon for base utility tracking. Biolab
Utility parts

Storage and utility

Roadmap watch

Lockers, storage cache, fabricators, processors, and support modules that affect co-op base flow.
Subnautica 2 Tadpole Dock render for vehicle support planning. Dock
Subnautica 2 Vehicle Fabricator render for vehicle support planning. Fabricator
Subnautica 2 Tadpole icon for vehicle support planning. Tadpole
Vehicle bay

Vehicle support

Roadmap watch

Tadpole Dock, Vehicle Fabricator, docking clearance, module support, and charging behavior.
Official Unknown Worlds Subnautica 2 base-building image used for refund and relocation planning. Base layout

Refund and relocation

Live guide

Move a bad first base without turning every misplaced corridor into a long manual cleanup.

Base planning rules

Build near oxygen first

The best first base is boring: close to the Lifepod, easy to return to, and supplied by starter resources.

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 official or in-game recipes or standalone value justify deeper pages.

Interior Wall

Hotfix 3 official

Unknown 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

Route lead

Welcome 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 lead

External 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

Route lead

The 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 lead

Useful for base power searches and player planning. Treat output, battery behavior, and recipe as in-game checks.

Dive Elevator

Source watch

Visible in external building coverage, but not yet strong enough for our final base-part list. Wait for official, route, or in-game support before promotion.

Room / Corridor / Growbed

Route lead

Support the broad base-building intent today; exact unlock order, size variants, and recipe rows need in-game 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 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 is a curated base-parts hub for Early Access. Exact part lists and recipe costs should be promoted only after in-game confirmation.

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. This page does not publish a full recipe table until in-game confirmation catches up.