ADU learning center

ADU Learning Center for This Product.

This section explains accessory dwelling units, California approval boundaries, the fold-out modular ADU product, the 1L and 3L model facts, and the local site work that still belongs in every real quote.

Buyer education

The goal is a cleaner decision, not a louder sales page.

An ADU buyer can get confused fast: prefab, modular, factory-built, permits, plan check, utilities, foundation, crane, site work, and finishes all get mixed into one price conversation. ADU Cost separates the ideas so the buyer can ask better questions and avoid comparing an incomplete unit quote against a real installed budget.

ADUAccessory dwelling unit: an added independent housing unit on a residential lot.

FBHFactory-built housing review supports the factory structure, not every local site condition.

Cost stackProduct, freight, setting, foundation, utilities, permits, finishes, contingency.

LearnWhat Is an ADU?Start with the housing concept before the product pitch.LearnHow This Product WorksUnderstand the fold-out module, transport logic, and quote path.LearnFactory-Built Housing vs Local PermitSee the approval boundary in plain language.LearnProduct Specs: R-22345 and R-22348Compare the documented 1L and 3L product paths.Learn3L Structural EngineeringSee R-22345 design criteria, floor/roof plans, SIP assembly, and steel details.Learn1L Structural EngineeringSee R-22348 wind criteria, ETABS model views, and load-path education.LearnSite Work and InstallationMap the local work that decides the installed budget.LearnFlooring and Wall-Panel FinishesUse the Kingdom catalogs as real finish-planning evidence.

Use the education

After the learning path, open the calculator with fewer guesses.

Pick the 1L or 3L path, enter only the numbers you actually know, and let the blank lines become the follow-up list for quote review.

Open calculator