Build an addition and estimate materials from real wall bodies

Native geometry with a review

Create geometry accepts feet and inches or millimeters. A new rectangular room can share all or part of an existing wall without adding a coincident wall. Conflicting shared dimensions and overlapping room interiors are rejected.

Before accepting geometry changes, compare saved and proposed room, wall, opening, object, roof and material-estimate counts plus clear floor area. Download the saved revision, keep it, or accept and use Undo. Removing a room keeps shared walls and removes its own unshared contents. At least one room remains.

Opening tools distinguish a through-void, installed door or window, and partial-depth wall niche. Measurements must fit the physical host and avoid overlapping cuts or unsupported joints. They do not specify a product rough opening.

Measurements with an explicit basis

Construction layers declare their role, thickness, measurement basis, product/source and unresolved requirements. Unknown thicknesses keep dependent component envelopes unresolved. Shared assemblies are copied before editing one wall.

Joint priority controls overlapping component envelopes at an actual wall encounter; its system revision and unresolved design requirements remain visible. This is not structural approval or a framing/fixing schedule.

Material estimates use clear floor or exposed interior wall faces, round package counts once across chosen rooms, and show allowance and optional USD price. A missing coverage source leaves the purchase quantity pending. Returns, ends, caps and stair floor apertures remain separate scope.

The real-wall workspace remains available through the opt-in editor while the final activation matrix is completed.

A closer look

View larger

View larger

View larger