# Planned developments in Diamond Bar, CA

Boardwalk found 42 planned projects in Diamond Bar, CA in public filings from the last 12 months. The latest is on the City of Diamond Bar Planning Commission agenda for Sep 22, 2026.

Data as of Oct 11, 2026. Updated monthly. Page: https://boardwalkai.com/development/california/diamond-bar/

## Diamond Bar at a glance

| Measure | Value |
|---|---|
| Projects, last 12 months | 42 |
| New in the last 30 days | 2 |
| Most common type | Govt. Decisions |
| Latest filing | Sep 22, 2026, City of Diamond Bar Planning Commission |
| Sources we check | 9 |

Last 12 months, duplicates merged. Includes private, public, and small jobs. How we count: https://boardwalkai.com/coverage/#how-we-count

## What's planned in Diamond Bar

By type, last 12 months.

| Type | Projects | Share |
|---|---|---|
| Development decisions | 19 | 45% |
| Residential | 9 | 21% |
| Public and institutional | 6 | 14% |
| Infrastructure | 5 | 12% |
| Commercial | 2 | 5% |
| Mixed use | 1 | 2% |

## Recent projects in Diamond Bar

| Project | Developer | Type | Size | Stage | Latest meeting |
|---|---|---|---|---|---|
| Diamond Bar Boulevard Complete Street Project | Not stated | Roads and highways | Not stated in filing | In design | Mar 26, 2026 |
| Town Center Specific Plan for Mixed-Use District | Not stated | Homes and businesses | Not stated in filing | Seeking approval | Mar 3, 2026 |
| SR-57/SR-60 Interchange Improvements | City of Industry | Roads and highways | Not stated in filing | In design | Feb 2, 2026 |
| $4.65M Heritage Park Master Plan | Integrated Consulting Group | Parks | Not stated in filing | Early planning | Feb 2, 2026 |
| $2.7M Sunset Crossing Park Development | Not stated | Parks | Not stated in filing | Early planning | Feb 2, 2026 |
| $3.8M Sunset Crossing Park Master Plan | Integrated Consulting Group | Parks | Not stated in filing | Early planning | Feb 2, 2026 |

Showing 6 of 42 projects. A free trial opens the full records and documents.

Samples show projects filed by companies or public bodies.

## Nearby places

- Walnut, CA · 34 projects
- Chino Hills, CA · 1 project
- [Pomona, CA](https://boardwalkai.com/development/california/pomona/) · 61 projects
- [Chino, CA](https://boardwalkai.com/development/california/chino/) · 40 projects
- San Dimas, CA · 4 projects
- [La Verne, CA](https://boardwalkai.com/development/california/la-verne/) · 22 projects

All places in California: [California](https://boardwalkai.com/development/california/)

## Questions about Diamond Bar

### What's planned in Diamond Bar, CA?

Boardwalk found 42 planned projects in Diamond Bar, CA in the last 12 months. The latest is on the City of Diamond Bar Planning Commission agenda for Sep 22, 2026.

### Where does this data come from?

Boardwalk's Diamond Bar projects come from public meeting records, such as City of Diamond Bar Planning Commission agendas and minutes. Each one links to the original filing.

### How current is it?

Boardwalk checks Diamond Bar's public records at least once a week; the last check was Oct 11, 2026. These counts are as of Oct 11, 2026 and refresh monthly.

### Can I get an Alert for new Diamond Bar projects?

Yes, a Boardwalk Alert emails you new Diamond Bar projects daily, weekly, or monthly. Start with a 7-day free trial, no credit card needed.

## Get the full data

- **Count for free.** Connect Boardwalk to Claude or ChatGPT and ask how many projects match. Counting is free during your trial and on every plan. [Use it in Claude or ChatGPT](https://boardwalkai.com/mcp/)
- **Open the records.** Start a 7-day free trial, no credit card. It includes 50 project records. [Start free trial](https://boardwalkai.com/auth/signup/)
- **Use it in your tools.** CSV export, the API, and the MCP server come with every plan. [API docs](https://boardwalkai.com/docs/api/)
- **Download these numbers.** [diamond-bar.json](https://boardwalkai.com/data/places/california/diamond-bar.json) · [diamond-bar.md](https://boardwalkai.com/development/california/diamond-bar/index.md)

## How to cite

Source: Boardwalk, "Planned developments in Diamond Bar, CA", boardwalkai.com/development/california/diamond-bar/, data as of Oct 11, 2026.

How we count: https://boardwalkai.com/coverage/#how-we-count