Any character, including henchmen, are able to have structures built.

• Engineer-Architect: DMG 30.
• Construction Time: DMG 106.
• Construction Listing: DMG 107.
• Costs of Furnishings (as reference): Dragon #117.

1. Player drafts a map (with grid scale) of the desired construction. The level of detail is up to the player. Some players like to make something simple and imagine the rest, whereas other players enjoy making detailed maps. Note that if a very simple map is presented and later on the details become relevant (e.g. if the building is besieged), the DM will have say on details not provided by the player.
2. Player uses the costs in the rules listing above in order to write up a proposal, which should include:
   1. List of prices for the construction and any furnishings.
   2. Required construction time.
   3. Calculated cost of architect-engineer (should include monthly cost of construction, plus one extra month for planning.)¹⁾)
   4. Total cost in money and time.
3. Once DM approves proposal, DM provides player with timeline of the process (namely, dates which construction begins and ends).