Custom home design & build in London, Ontario

Industry estimates for custom builds in Southwestern Ontario typically land between $250 and $500+ per square foot, depending on the lot, the design, and the level of finish. At those market rates, a 2,500 sq ft home spans roughly $625,000 to over $1.25M before land — a wide range, which is exactly why we treat published numbers as a starting point for conversation rather than a quote.

What moves a project within that range: site servicing and soil conditions, foundation type, the complexity of the design (a simple rectangle costs less per foot than a sprawling footprint with six rooflines), and the interior finish level. Location matters less than people expect — building in Ilderton or Komoka prices similarly to London itself, though rural lots in Parkhill or Grand Bend can carry servicing costs that urban lots don't.

Two things to know about how Starlit prices a build. First, our high-performance envelope — continuous insulation, triple-glazed windows, guaranteed airtightness — is the standard specification, not an upgrade sheet that inflates the contract later. Second, you get a real, line-item budget at the end of design, before construction commits you to anything.

These are typical market ranges, not Starlit quotes — every lot and every design prices differently. For a full breakdown of where the money goes, read our guide to the cost to build a house in Ontario.