Dirty Business Base Building Guide — July 2026 | Dirty Business Wiki

Building your underground facility in Dirty Business is more than unlocking tiles — it is designing flow between raw intake, production, storage, disposal, and outbound delivery. Poor layout tax every hour you play through wasted worker steps, elevator queues, and heat spikes from trash left on long haul paths. This guide covers room types, sensible expansion order, and how demo construction differs from full Early Access scope.

Starting Layout and First Expansions

Every save begins with a tutorial footprint: minimal grow space, basic storage, an order terminal, and disposal access. Before spending expansion currency, walk the full loop described in the beginner guide and note choke points.

First purchases should solve concrete problems:

• Cannot store harvest → storage room
• Machines power off mid-run → generator / power room
• Trash piles near growers → disposal adjacency to production

Cosmetic walls and decorative partitions come after functional rooms — Early Access cash is too tight for vanity before upgrades stabilize income.

Room Categories

Full EA bases mix these functional zones:

Zone	Role	Links to
Cultivation	Weed timers and drying	Weed strains
Machining / assembly	Weapons parts chain	Weapons
Print shop	Counterfeit presses	Counterfeiting
Lab	LSD synthesis	LSD
Storage	Secure and bulk racks	Complete orders
Disposal	Burners, bins, evidence	Evidence disposal
Logistics	Garage, elevators, staging	Elevator delivery

Demo bases include cultivation, basic weapons, storage, and disposal — not full print shops, labs, or cartel logistics.

Layout Principles That Scale

Short hops beat long halls. Place drying racks beside planters, assembly beside machining, and disposal beside the messiest line currently running. One-way flow reduces cross traffic: materials descend from intake storage to production to outbound staging without backtracking through grow rooms.

Separate humidity and chemistry. Grow rooms near LSD labs cause flavor problems in UI logic and player planning — keep wet and dry zones on different wings. Power trunk lines down a central corridor simplify generator upgrades later.

Document your layout for co-op partners — co-op sessions fall apart when only one player knows which elevator goes to packaging.

Expansion Order vs Production Unlocks

Do not unlock rooms you cannot feed. Suggested sync with production tier list:

1. Expand cultivation after accepting recurring weed orders
2. Add machining when starting manufacture weapons
3. Build print shop only when counterfeiting is purchased in EA
4. Add lab tiles when LSD precursors are affordable
5. Expand garage and staging before cartel airstrip contracts

Each step should follow a profitable week, not anticipation three tiers ahead.

Power and Vertical Build-Out

Multi-floor bases share generators. Adding a floor without upgrading power creates random machine shutdowns that look like bugs — check controls troubleshooting only after verifying wattage in upgrades.

Elevators are part of building design. Multiple vertical drops to the underground garage reduce single-shaft queues covered in elevator delivery.

Demo Construction Limits

Demo players hit soft caps on how far the footprint grows before EA purchase. Use demo construction to practice flow principles rather than perfect endgame symmetry. Four weed strains and one weapon type still teach whether you prefer compact or sprawling designs.

When migrating to EA, expect to rebuild rather than patch old corners — sunk layout cost is normal.

Security and Raid Considerations

Surface-linked expansions like street dealers increase visibility. Security rooms and camera analogs (where available) belong between public-facing exits and high-value storage. Details spread across base distribution and upgrade base.

Workers and Pathing

NPC workers choose paths based on doors you place. Accidentally sealing a route with a new wall idles staff silently. After every build session, watch one worker cycle end-to-end per production line — see hire workers.

Controls While Building

Build mode uses the same controls layer as crafting. Rebind rotate or confirm keys in keybinds if you place walls frequently. Mis-clicks are expensive when demolition refunds less than build cost.

Walkthrough Gates and Story Rooms

Some tiles unlock via walkthrough missions rather than cash. If a room appears locked despite funds, check mission progress before grinding more orders.

Patch and Update Awareness

Room costs and size requirements may change in Early Access. Updates note structural changes — revisit this guide after major patches before sharing layout screenshots as “optimal.”

Building well is a force multiplier for every production line. Expand with purpose, route evidence short distances, and align new tiles with the next tier on your production roadmap — not the shiniest unlock icon. Community tools may add layout planners as players share optimal footprints.