CallataGuidesBusiness phone system for plumbing, heating and air-conditioning contractors in St. Louis, MO-IL
Plumbing, heating and air-conditioning contractors in the St. Louis, MO-IL metro area: 806 establishments in 2023, the local area codes, and what phone service costs a 14-person team.
- Establishments
- 806CBP 2023
- Employees
- 11,672mid-March 2023
- Per 100k residents
- 28.7U.S. 32.7
- Rank
- 26th of 920areas by count
Plumbing, heating and air-conditioning contractors in St. Louis, MO-IL by the numbers
There were 806 plumbing, heating and air-conditioning contractors in the St. Louis, MO-IL metro area in 2023, according to Census County Business Patterns (NAICS 238220, Plumbing, Heating, and Air-Conditioning Contractors). They employed 11,672 people in mid-March and paid $980.8 million in annual payroll. By establishment count the area is 26th out of 920 areas with published figures for plumbing, heating and air-conditioning contractors.
Measured against its 2.8 million residents (2024 estimate), the area has 28.7 plumbing, heating and air-conditioning contractors per 100,000 people; the U.S. rate is 32.7, so St. Louis, MO-IL is 12.3% below the national figure. The average establishment here has 14.5 employees, compared with 10.9 nationally. Payroll per employee comes to $84,029, 14.0% above the national $73,693.
| Measure | St. Louis, MO-IL | Missouri | United States |
|---|---|---|---|
| Establishments | 806 | 1,915 | 111,207 |
| Mid-March employees | 11,672 | 23,628 | 1,214,761 |
| Annual payroll | $980,791,000 | $1,780,340,000 | $89,519,407,000 |
| Employees per establishment | 14.5 | 12.3 | 10.9 |
| Payroll per employee | $84,029 | $75,349 | $73,693 |
| Establishments per 100,000 residents | 28.7 | 30.7 | 32.7 |
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: plumbing, heating and air-conditioning contractors in St. Louis, MO-IL
Of the plumbing, heating and air-conditioning contractors in St. Louis, MO-IL that had employees in March 2023, 53.3% had fewer than five (the U.S. share is 58.3%). 72.0% had fewer than ten. Small teams usually share the phone: the person who answers is often also serving a customer or doing the job, which is when calls get missed.
| Employment size | Establishments | Share | U.S. share |
|---|---|---|---|
| 1–4 employees | 429 | 53.3% | 58.3% |
| 5–9 employees | 151 | 18.8% | 18.5% |
| 10–19 employees | 98 | 12.2% | 11.8% |
| 20–49 employees | 78 | 9.7% | 7.5% |
| 50 or more employees | 49 | 6.1% | 3.8% |
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 a plumbing and HVAC contractor in St. Louis, MO-IL has to catch
Plumbing and HVAC calls are often emergencies: no heat, no cooling or water where it should not be. Homeowners call down a list until someone answers, so a missed call is frequently a lost job.
A few of the calls that come in to plumbing, heating and air-conditioning contractors in St. Louis, MO-IL:
- The dispatcher calls a customer with a technician's arrival time.
- A homeowner calls because the air conditioning stopped working.
- A tenant calls about a burst pipe.
Business texting for plumbing, heating and air-conditioning contractors
Contractors text arrival windows, technician names and invoices.
Texts sent from a local business number in St. Louis, MO-IL have to be registered with carriers first (10DLC); on Callata that is a one-time $49 fee, after which the whole team can text from the shared number.
What a phone system costs a plumbing and HVAC contractor in St. Louis, MO-IL
The average plumbing and HVAC contractor in St. Louis, MO-IL has 14.5 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 a plumbing and HVAC contractor in St. Louis, MO-IL of that size. Annual contracts lower some competitors' prices, so compare the plan you would actually sign.
| Provider (plan) | Pricing basis | Per month | Per 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 St. Louis, MO-IL
NANPA records place the exchanges of the area's named cities and towns in 8 area codes. 314 has the most, with 723 of 1,483 exchanges (49%). A local number lets customers in St. Louis, MO-IL 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 code | Exchanges | Time zone | In service since | Overlay with |
|---|---|---|---|---|
| 314 | 723 | Central | 1947 | 557 |
| 618 | 324 | Central | 1947 | 730 |
| 636 | 308 | Central | 1999 | none |
| 557 | 71 | Central | 2022 | 314 |
| 730 | 30 | Central | 2023 | 618 |
| 217 | 14 | Central | 1947 | 447 |
| 573 | 11 | Central | 1996 | 235 |
| 447 | 2 | Central | 2021 | 217 |
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 plumbing, heating and air-conditioning contractors
For $99 a month, Callata puts a team of up to 5 on one plan ($20 for each person after that): up to 3 local numbers, unlimited inbound calls, a pooled allowance of 1,500 outbound US and Canada minutes per user, browser and cell calling, voicemail transcription with urgency triage, recorded calls with AI summaries and business-hours routing, with E911 on every number.
Porting a number you already use in St. Louis, MO-IL 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 plumbing, heating and air-conditioning contractors are there in St. Louis, MO-IL?
Census County Business Patterns counted 806 plumbing, heating and air-conditioning contractors in the St. Louis, MO-IL metro area in 2023. They employed 11,672 people in mid-March.
What does a business phone system cost for a 14-person plumbing and HVAC contractor?
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 a plumbing and HVAC contractor in St. Louis, MO-IL use?
Area code 314 has the most assigned exchanges among the area's named places, followed by 618 and 636. If you already have a local number, you can port it to Callata for free.
Can an AI receptionist answer calls for a plumbing and HVAC contractor?
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.