About this site and how we verify it

Written and checked by the DuloCore research team. Last verified: November 11, 2026.

This site explains what it takes to replace windows in a City of Los Angeles home: the cost, the LADWP rebate, the LADBS permit and the glass rules, with a free estimator on the home page.

Who runs this site

This site is published by DuloCore, a California home-energy rebate service. Every page is written and checked by the DuloCore research team. We are not LADWP, LADBS, City Planning or any government agency, and we do not install windows. We do not rank or recommend installers, and nothing here is legal, tax or engineering advice.

How we verify every figure

• Rebate amounts, such as the one on our LADWP rebate page, come only from DuloCore's verified program catalogue, and we print one only after confirming it on the official program page on the date shown. If the official page disagrees or will not load, we name the program and link it, but leave the amount out.
• Ended programs, such as the federal 25C credit, are labelled as ended, with the official source.
• Cost ranges on the cost page come from named publishers (HomeGuide, Fixr and This Old House), each linked with its own date and our access date. We do not apply a Los Angeles price adjustment, because we found no published source for one.
• Permit, code and fire-zone rules are quoted from LADBS, LA City Planning, the California Energy Commission, CAL FIRE and LA County documents, and we say which code cycle a document belongs to.
• Things we could not confirm, such as a current LADBS fee for a window permit, are left out rather than guessed.
• Every page ends with its sources, each marked with the date we accessed it.

Last verified

All figures and rules on this site were last verified on November 11, 2026. Programs change, and LADWP states that its rebates can be modified or ended without notice, so check the official page before you buy.

Corrections policy

If you find a wrong figure, email support@dulocore.com; we fix verified errors within 7 days. Please include the page address and the official source that shows the correct number.

Contact

Email support@dulocore.com. For questions about your own rebate application, contact LADWP's Consumer Rebate Program directly; for permits, contact LADBS.