Home addition planner

Match the source cell to the build scope

6 decisions

Published price scenario

Size and build type select one exact table cell.

Published project size

Only the seven sizes in Angi's table are accepted. There is no arbitrary-area input.

Published build type

Second Story Build means the general article's 60–400 sq ft column, not the dedicated second-story dataset.

Your addition profile

Context only — does not change the table cell

These answers expose design and delivery boundaries. Matching answers may show separate site-prep or permit references without adding them.

Site preparation

Structural/design status

Utility scope

Approvals

No interpolation, unit multiplication, permit or site-prep addition, location multiplier, or dedicated second-story mixing.

Source-backed build planning

How the home addition calculator works

Size and build type resolve one registered Angi table cell. Project answers select structural, utility, access, and approval questions and can surface separate site-prep or permit references without adding them.

It does not multiply a per-square-foot reference, interpolate between sizes, add permits or site preparation, or adjust for foundation, rooms, finishes, location, structure, or utilities.

Review all home-addition source context

Define structure, approvals, and utilities locally

A national table cell cannot inspect foundation capacity, roof tie-in, soil, access, weather protection, electrical, plumbing, HVAC, egress, setbacks, zoning, permits, inspections, exterior matching, finishes, or concealed conditions.

Read the dedicated second-story planning guide