A family-owned builder in Ontario, California.
Castle Construction and Development builds new homes, remodels and ADUs across the Inland Empire, Los Angeles County and Orange County, in English and Spanish.
- Founded
- 2026
- Office
- Ontario, California
- Working in
- Inland Empire, Los Angeles County, Orange County
- Languages
- English and Spanish
Why Castle exists
Castle was started by a family who saw homeowners deal with inflated pricing, abandoned projects and contractors who stopped communicating.
The aim is the opposite: explain the options before you commit, put decisions and changes in writing, and keep the order of work clear from the first conversation to the final walkthrough.
What guides the work
Honor
Say what a project involves, including what is not yet known.
Commitment
See the project through in the order it was planned: approvals before construction, inspections at every stage.
Excellence
Get the parts you cannot see right: structure, systems and the connection between old and new.
The founders
Alejandro “Alika” Castellon Jr.
Co-founder and owner
Alex Castellon
Co-founder and owner
Where we work
- Ontario
- Rancho Cucamonga
- Chino
- Chino Hills
- Fontana
- Upland
- Montclair
- Pomona
- San Bernardino
- Riverside
- Los Angeles County
- Orange County
Talk about your project
Start with a brief you can keep, or send us your question.