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Master Builder
"Build anything, instantly, for free."
How do I install Master Builder?
Download the free ProjectMods desktop app, then install Master Builder for RimWorld in one click.
</>What does Master Builder do?
Big builds in RimWorld are a logistics marathon — mine the steel, haul it across the map, then wait for a builder to slowly stack it into a wall. Master Builder deletes all of it. Place any structure and it's finished the second you set it down. No materials spent, no hauling, no construction time. That means you can design the base you actually picture in your head instead of the one your resource pile allows. Drop a full defensive perimeter, a marble throne room, a sprawling hospital wing — done, instantly, for free. Dream layouts stop being a multi-season project and become a few clicks. This is the mod for the players who treat RimWorld as a base-design canvas, and for anyone who wants a strong colony standing before the next raid instead of a half-built one. Flip it on for creative freedom, flip it off when you want the honest gather-and-build loop back.
</>What is Master Builder?
Master Builder turns RimWorld into a free-build sandbox. Any structure you place finishes the instant you set it down — no materials to gather, no hauling, no waiting for a builder. Sketch out walls, workshops, and defences as fast as you can imagine them. Perfect for base design and testing layouts. Free from ProjectMods, one-click install.
</>Common questions about Master Builder
What does Master Builder do in RimWorld?
Master Builder lets you place any structure in RimWorld and have it finish immediately, with no resource cost, no hauling, and no construction time. Walls, floors, workbenches, turrets, furniture — the moment you set the blueprint down, it's fully built and ready to use. It removes the entire supply-and-labour chain that normally stands between an idea and a finished base, so building becomes as fast as drawing. It's built for players who love the design side of RimWorld and want to shape a colony without stockpiling steel or waiting on a lone constructor. Toggle it off to return to normal material costs and build times.
Do I still need building materials like steel and wood with Master Builder?
No — that's the core of it. With Master Builder on, structures in RimWorld cost nothing to place, so you don't need to stockpile steel, wood, stone blocks, or components to build. Your storage can be empty and you can still throw up a fortress of granite walls and a room full of high-tech workbenches. This is a huge time-saver for ambitious builds that would normally require enormous mining and hauling operations first. It also means a struggling early colony can leapfrog straight to solid infrastructure. If you'd rather earn your materials the traditional way, just toggle the mod off and costs return to normal.
Does Master Builder skip the construction time and the builder colonist?
Yes. Normally a structure sits as a blueprint until a colonist with the right construction skill hauls materials over and spends time building it. Master Builder collapses all of that into an instant result — the structure is complete the moment you place it, without waiting for a builder to walk over or roll a success on their skill. That means no failed constructions, no half-built walls during a raid, and no bottleneck when your only good builder is busy. Your colonists are freed up for other work while your base goes up at the speed of your mouse. Toggle off to hand construction back to your pawns.
Can I use Master Builder to quickly repair or rebuild after a raid?
Absolutely — it's one of the most satisfying uses. After a raid tears through your walls or a fire guts a room, Master Builder lets you slap the whole thing back together instantly instead of running a slow, material-hungry repair operation while the next threat looms. Redraw the damaged walls, replace destroyed turrets, and rebuild burned furniture in seconds, all at no resource cost. It turns post-raid recovery from a tense scramble into a quick redraw, so you're battle-ready again almost immediately. It's equally handy for rapidly iterating on a base layout you're not happy with. Toggle it off once you're back to normal play.
Why would I use Master Builder?
Because gathering materials and waiting on construction is the slow scaffolding around the part many players actually love: designing the colony itself. Master Builder lets you build exactly what you picture, immediately, so you can experiment with killbox shapes, room layouts, and grand mountain fortresses without a mining montage first. It's perfect for creative base-builders, for testing defensive designs before committing, and for content creators who want to show off a finished colony fast. It's free from ProjectMods, the community-first modding platform for 400+ PC games, and installs in one click. Toggle it off any time you want the resource-and-labour challenge back.
What options does Master Builder include?
Instant Free Building
Master switch. Turn it on to place finished buildings for free. Off returns to normal construction.
Master Builder finishes any RimWorld structure the moment you place it, with no materials, hauling, or construction time, so you can design freely — a free mod from ProjectMods.
System Requirements
What features does Master Builder include?
- Finishes any structure the instant you place it, with zero construction time
- Costs no materials, so you can build without mining or stockpiling a thing
- Skips all the hauling and builder labor that normally slows big projects to a crawl
- Lets you drop entire defensive perimeters, wings, and rooms in a few clicks
Best For
- Base-design enthusiasts who want to build the colony they picture without waiting on resources and labor
- Players who need a fully walled, turret-ready defense standing before the next raid hits
- Creative builders laying out sprawling showcase colonies for screenshots or streams
- Anyone rebuilding after a fire or siege who wants their base back up now instead of over several seasons
Miracle Worker
Patch up every wound, cure every illness, regrow lost limbs, and even bring the fallen back to life — all with a single press.
Green Thumb (Instant Harvest)
Your crops shoot up to fully grown almost instantly, so your farms are always ready to harvest.
Second Wind (No Sleep Needed)
Your colonists stay wide awake around the clock, working through the night without ever crashing.
