Diamond Roofing System Inc

Roofing contractor in Rowland HGHTS, CA 91748

About this company

Diamond Roofing System Inc is listed as a roofing contractor based in Rowland HGHTS, California, in Los Angeles County. Federal motor carrier records list 111 drivers and 1 trucks for the company. It is one of 2 roofing companies in ZIP 91748.

Other roofers nearby

Highpoint Roofing Company17984 Gallineta St, Rowland Heights

(323) 945-4083

Fleet size

Drivers111

Trucks1

Last federal filing: Mar 2020. Source: FMCSA.

Strong market, balanced fieldArea profitability for roofing in ZIP 91748

Housing demand65

Sales pace, new listings and new construction. Source: Zillow

Customer spending power81

Household income and home values

Room for another roofer55

Less crowded than 55% of US ZIPs

Scored against every US ZIP. An index of local conditions, not this company's results.

County context

One of 1,057 roofing companies in Los Angeles County, CA.

5,413 general contractors in Los Angeles County, CA.

All 11,199 construction companies in Los Angeles County, CA.

ZIP 91748 at a glance

Population: 42,463 (1,157 per sq mi)
Median age: 46
Households: Median income $83,428 · 43% earn six figures
Housing: 67% owner-occupied
Workforce: 60% labor-force participation · 5.8% unemployment

ZIP figures are US Census estimates for the ZIP area, not the company.

Housing market around ZIP 91748

Figures describe the local area, not this company.

Typical home value$946,000+0.8% past year · +64% in 10 years

Typical rent$2,390+14.1% past year

12-month value outlook+1.3%

New homes permitted, 202522,250Los Angeles County

Days to sale agreement26Los Angeles metro · 28 a year ago

Listings with a price cut24.4%Los Angeles metro

Sale price vs list99.9%Los Angeles metro

New construction sales217Los Angeles metro, Aug · +5% from last year

Source: Zillow (home values, rent, outlook and metro sales), data through Sep 2026. Permits: U.S. Census Bureau.

Typical home value, last 10 years

Source: Zillow Home Value Index, Sep 2026.

Local roofing angle: 350 homes in this ZIP, 2% of the total, were built from 2000 to 2009, so they are now 17 to 26 years old. Only 64% were built before 1980.

Local figures are estimates from public records and Zillow housing data, updated regularly.