Sol One Base Building Guide: Blueprints, Pressure and Power
How building works in Sol One: blueprints, hauling materials, pressurizing rooms, and laying out a base that survives its first dust storm.
Sol One does not hand you a habitat. It hands you a pressure suit, a mostly empty crater, and a fabricator that can turn rock into panels. Everything between those three things and a breathable room is your problem, and the game's building system is unusual enough that the first hour of construction usually goes wrong in a specific way: people build a shelter, assume it is sealed, take off the helmet, and discover that "indoors" and "pressurized" are two different states.
This guide covers the construction loop from the first foundation to a base that can run through a dust storm. For the sealing rules themselves, the companion page on pressurized bases→ goes wall by wall; here we deal with siting, layout, material flow and the order you should build things in.
How building actually works
The developers rebuilt construction during the delay, and the Early Access build uses two distinct paths.
Large structures use blueprints. You place a blueprint for a habitat module, corridor, foundation or wall run, and the game generates a material requirement. Those materials are then hauled to the site — by you, and later by a rover — and the structure assembles when the delivery is complete. This is deliberate: the announcement describing the change says large structures are built from blueprints with materials carried to them, rather than conjured from a menu.
Small devices come out of the fabricator. A furnace, a solar panel, a light or a power pole is produced as a boxed item, carried in your hands, and placed manually. That sounds like a small distinction, but it changes your base layout: devices need floor space and access, and you will move them once you understand where the power actually flows.
Blueprint construction makes the shell. Fabricator placement makes the machinery. A base that is all shell is a cave; a base that is all machinery is a scrapyard.
The practical consequence is that your first base should be small and modular. A single sealed room with an airlock, one furnace, one power source and one oxygen source is a complete survival unit. You can expand it later without demolishing anything, because corridors and modules attach rather than replace.
Choosing the site
You can build almost anywhere, but four variables decide whether a site is good.
- Ice access. Water is the bottleneck of every life-support chain. Landing next to a subsurface ice deposit removes an entire logistics problem.
- Flat ground with room to grow. A crater floor is easier than a slope, and foundations are cheaper than terraces.
- Solar exposure and dust risk. Solar panels want open sky, but a site in the path of frequent dust storms will lose most of its generation for hours at a time. A mixed site — open enough for panels, sheltered enough to break the wind — is better than a perfect solar plateau.
- Distance to points of interest. Crashed ships and abandoned mission bases are your early source of parts and story beats. A base within a short rover drive of one is worth more than a prettier view.
You do not need to survey the whole map. Walk a short radius, note ice, note flat ground, note one POI, and commit. Sol One rewards iteration over perfect planning, and a bad base can be abandoned faster than a good site can be found.
Place a beacon or a small marker at the site you intend to use. In an open-world Mars with procedural terrain, "I will remember this crater" is the most common way to lose a base before it exists.
The room hierarchy
Think of your base as four levels of enclosure, and do not skip a level.
| Level | What it is | What it gives you |
|---|---|---|
| Shelter | Roof and walls, no seal | Wind and dust protection, a place to park equipment |
| Sealed volume | Closed room with a door | A controlled interior that can be pressurized |
| Pressurized habitat | Sealed volume plus airlock and oxygen supply | A place where the suit comes off |
| Life-support loop | Habitat plus power, water and food | A place you can live indefinitely |
Most new players jump from level one to level four and wonder why the oxygen meter keeps dropping. The sealed volume is the step that actually matters, and it is the step the game does not visually advertise. A door that closes is not an airlock; a room with a hole in the roof is not sealed.
The airlock is a room, not a door
An airlock in Sol One is a small sealed chamber with two doors, one to the outside and one to the habitat, and it exists to let you change pressure without venting your living space. That means it needs its own walls, its own ceiling and enough floor space to stand in a suit. If you build a single door directly into a habitat wall, every entry equalizes the room with Mars.
Put the airlock on the side of the base that faces your working area, not the side that looks best. You will walk through it hundreds of times.
The suit room
Between the airlock and the habitat, keep a small transition space for the suit itself. The Early Access build added suit, helmet and oxygen tank handling, so the practical layout is: outside → airlock → suit room → habitat. The suit room is where you drop the pack, refill the tank and avoid dragging dust into the living space. It also gives you a buffer if the airlock fails.
A workshop is where you cut, smelt and fabricate, and those processes are dirty. Pressurize the living module first, then build the workshop as a separate sealed volume or as an unpressurized but roofed annex. Sharing one room means every crafting session costs you air.
Layout: the five-room starter base
A layout that works with the game's modular pieces and does not need to be rebuilt:
- Airlock — smallest sealed module, outside-facing.
- Suit room — storage for the suit, tanks and a spare oxygen supply.
- Core habitat — bed, research bench, food and water storage. This is the room you pressurize first.
- Workshop annex — furnace, fabricator, raw material storage. Roofed, not necessarily pressurized.
- Greenhouse — later, a sealed and lit room for crops, ideally next to the water supply.
Corridors connect 1–3 and 4–5. Keep corridors short; every extra segment is another seal to maintain and another volume to heat. A compact base with five rooms beats a sprawling base with fifteen, because the life-support load scales with volume, not with floor area you actually use.
Build order (and why)
- Day one: foundation, airlock shell, core habitat shell, one power source, one oxygen source. Do not decorate.
- Day two: seal and test the core. Pressurize it before you build anything else, because a leak found now costs one wall and a leak found after the workshop is attached costs a rebuild.
- Day three: workshop annex and material storage. Move the furnace out of the habitat.
- Day four onward: greenhouse, water storage, second power source, rover bay.
The sequence is deliberately "seal small, then grow". Every additional room should be added to a base that already holds pressure, so a failure is localized.
Material flow
Base building is a logistics game wearing a construction hat. The resources you will move most are regolith-derived panels, metal components and sealant-type materials, and the constraint is not usually the resource — it is the trip.
Three rules keep material flow sane:
- Process at the source, not at the base. If ore is heavy and refined material is light, build the first furnace near the mining site, or accept that you will drive a rover back and forth.
- Keep a buffer of every structural material at the base. Running out of one panel type mid-wall is the most common reason a build stalls for a day.
- Use the rover as a trailer, not as a taxi. The Crawler is for cargo and long trips; walking is for short hauls around the base.
Power, heat and the dust problem
A base is a machine that consumes power to stay habitable. Before you add a second habitat module, check three numbers:
- Generation at night. Solar alone gives you a brownout every night. You need either storage or a second source before you expand.
- Peak draw. Oxygen production, heating, lighting and the fabricator can all run at once. If they do, something trips.
- Dust margin. A storm can cut solar output and visibility for hours. Whatever your base draws normally, plan for a fraction of it.
The full breakdown lives in the power grid guide→, but the base-building rule is simple: never attach a new room to a grid that has not yet survived a full Martian night.
Common mistakes
- Building the roof last. Seal the ceiling before the walls, or dust gets into everything you place inside.
- One door, no airlock. Every entry vents the room.
- Pressurizing a room with a furnace in it. Combustion and fabrication in a sealed volume is a bad idea in fiction and a worse one in the resource model.
- Expanding before the loop closes. A second bedroom is not progress if the water recycler cannot keep up.
- No storage at the airlock. You will arrive with a full inventory and nowhere to put it.
FAQ
Can I build anywhere on Mars? Yes, with the usual caveats: flat ground is cheaper, ice is valuable, and proximity to a POI saves rover time. The map is a full-scale Mars with procedural terrain, so there is no shortage of sites.
Do I need a foundation? For large structures, yes in practice. Foundations give you a level surface and a clean attachment point, and they make later expansion much easier.
Can I move a building after I place it? Small fabricator-made devices can be picked up and repositioned. Large blueprint structures are effectively permanent, which is why the site survey matters.
Does the base need heating? The habitat does. Mars is cold, and a pressurized room without heat is a room you cannot use. Plan heating into the power budget from the first night.
Will my base be attacked? Sol One is a survival and building game, not a tower-defense game. The threats are environmental — dust, cold, oxygen loss, power failure — rather than raiders.