CallataGuides

Business phone system for engineering services firms in Los Angeles, CA

Engineering services firms in the Los Angeles-Long Beach-Anaheim, CA metro area: 2,983 establishments in 2023, the local area codes, and what phone service costs a 14-person team.

Establishments
2,983CBP 2023
Employees
41,746mid-March 2023
Per 100k residents
23.1U.S. 18.6
Rank
1st of 735areas by count

Engineering services firms in Los Angeles, CA by the numbers

There were 2,983 engineering services firms in the Los Angeles-Long Beach-Anaheim, CA metro area in 2023, according to Census County Business Patterns (NAICS 541330, Engineering Services). They employed 41,746 people in mid-March and paid $5.0 billion in annual payroll. By establishment count the area is 1st out of 735 areas with published figures for engineering services firms.

Measured against its 12.9 million residents (2024 estimate), the area has 23.1 engineering services firms per 100,000 people; the U.S. rate is 18.6, so Los Angeles, CA is 24.1% above the national figure. The average establishment here has 14.0 employees, compared with 19.9 nationally. Payroll per employee comes to $120,429, 9.5% above the national $109,949.

Engineering services firms: Los Angeles, CA compared with California and the U.S., 2023
MeasureLos Angeles, CACaliforniaUnited States
Establishments2,9838,89863,233
Mid-March employees41,746142,5911,260,577
Annual payroll$5,027,434,000$17,866,080,000$138,599,619,000
Employees per establishment14.016.019.9
Payroll per employee$120,429$125,296$109,949
Establishments per 100,000 residents23.122.618.6

Census County Business Patterns 2023 (mid-March employment; annual payroll). Employees and payroll flagged high-noise are shown but not used in the text. Residents: Census Vintage 2024 estimates.

Establishment size: engineering services firms in Los Angeles, CA

Of the engineering services firms in Los Angeles, CA that had employees in March 2023, 62.4% had fewer than five (the U.S. share is 53.1%). 75.5% had fewer than ten. When a business has only a few people, whoever is free answers the phone, and calls that arrive while everyone is busy go to voicemail unless they are routed somewhere else.

Engineering services firms in Los Angeles, CA by employment size, 2023
Employment sizeEstablishmentsShareU.S. share
1–4 employees1,85962.4%53.1%
5–9 employees39313.2%15.0%
10–19 employees32911.0%13.1%
20–49 employees2438.2%11.3%
50 or more employees1575.3%7.6%

Employment-size classes count establishments by mid-March 2023 employment. Establishments with no March employees are excluded from the size classes, so shares are of establishments with employees. Source: Census County Business Patterns 2023.

Calls an engineering firm in Los Angeles, CA has to catch

Engineering firms handle client calls, contractor questions and agency coordination, often while staff are in the field. Routing calls to the right project engineer saves time on every project.

A few of the calls that come in to engineering services firms in Los Angeles, CA:

Business texting for engineering services firms

Firms text site meeting times and document notifications.

Team texting on Callata runs from your business number, so replies come from the practice or shop rather than someone's personal phone. It turns on after the one-time $49 carrier registration (10DLC) is approved.

Callata vs. per-seat pricing for engineering services firms in Los Angeles, CA

The average engineering firm in Los Angeles, CA has 14.0 employees, so a 14-person team is a reasonable benchmark. On a per-user plan that headcount sets the bill: $349.30 a month on Ooma Office Pro or $420.00 on RingCentral RingEX Core at list price (checked September 28, 2026). Callata comes to $279.00 a month for 14 users ($99 a month with 5 users included, then $20 per additional user), below both.

Over a year, that is $1,692 less than RingCentral for an engineering firm in Los Angeles, CA of that size. Annual contracts lower some competitors' prices, so compare the plan you would actually sign.

Monthly list price for a 14-person engineering firm
Provider (plan)Pricing basisPer monthPer year
Callata (Callata Office)$99 incl. 5 users, $20 per extra user$279.00$3,348.00
Quo (Starter)$19.00 per user$266.00$3,192.00
Nextiva (Core)$23.00 per user$322.00$3,864.00
Ooma (Office Pro)$24.95 per user$349.30$4,191.60
Dialpad (Standard)$27.00 per user$378.00$4,536.00
RingCentral (RingEX Core)$30.00 per user$420.00$5,040.00

Competitor prices are each vendor's published month-to-month list price per user for its lowest plan that includes business calling and texting, checked September 28, 2026: Quo Starter $19, Nextiva Core $23, Ooma Office Pro $24.95 (Essentials excludes texting; one-time $29.95 activation not included), Dialpad Standard $27, RingCentral RingEX Core $30 ($20 billed annually). Prices exclude taxes and fees and may change; annual contracts lower some competitors' prices.

Getting a local number in Los Angeles, CA

NANPA records place the exchanges of the area's named cities and towns in 8 area codes. 323 has the most, with 786 of 5,035 exchanges (16%). A local number lets clients in Los Angeles, CA call without dialing out of area. Callata includes up to 3 local numbers, and which numbers are open in an area code depends on carrier inventory when you choose.

Area codes in the Los Angeles, CA area by assigned exchanges
Area codeExchangesTime zoneIn service sinceOverlay with
323786Pacific1998213, 738
213780Pacific1947323, 738
714777Pacific1951657
626722Pacific1997none
657643Pacific2008714
562541Pacific1997none
949454Pacific1998none
310332Pacific1991424

Exchanges are NANPA-assigned central office codes (NPA-NXX) in the rate centers matched to the area's named places. Source: NANPA utilized code and NPA reports.

How Callata works for engineering services firms

Callata Office costs $99 per month for up to 5 people, and each additional user is $20 a month. That covers up to 3 local numbers, calling from a browser or your cell, transcribed voicemail, recorded calls with AI summaries, after-hours routing and E911 on each number.

Porting a number you already use in Los Angeles, CA is free, and business texting is available once the carrier registration (10DLC) is approved; the registration carries a one-time $49 fee. Which specific numbers are open in a given area code depends on carrier inventory at the time you sign up.

AI agents are optional: an AI receptionist or scheduler can pick up when the team is busy or closed, take a message, send a text or email, or transfer the call. They draw on prepaid AI minutes ($0.25/minute), disclose that they are AI, and outbound AI calls require prior consent and are limited to 8am–9pm.

Frequently asked questions

How many engineering services firms are there in Los Angeles, CA?

Census County Business Patterns counted 2,983 engineering services firms in the Los Angeles-Long Beach-Anaheim, CA metro area in 2023. They employed 41,746 people in mid-March.

What does a business phone system cost for a 14-person engineering firm?

At month-to-month list prices checked September 28, 2026, 14 users cost $420.00 a month on RingCentral RingEX Core and $349.30 on Ooma Office Pro. On Callata, $99 a month with 5 users included, then $20 per additional user, the same team pays $279.00.

What area code should an engineering firm in Los Angeles, CA use?

Area code 323 has the most assigned exchanges among the area's named places, followed by 213 and 714. If you already have a local number, you can port it to Callata for free.

Can an AI receptionist answer calls for an engineering firm?

Yes. Callata's optional AI agents can answer when the team is busy or closed, take a message, text, email or transfer the call. They disclose that they are AI and are billed from prepaid AI minutes at $0.25 per minute.