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Assistant Estimator Jobs in Riverside, CA (NOW HIRING)

C.W. Driver

Estimator- Driver SPG

Anaheim, CA

Solicit, evaluate, and level subcontractor bids; coordinate RFIs between bidders and design teams. * Assist in developing conceptual and detailed estimates using historical cost data. * Support value ...

S.J. Amoroso Construction

Estimator

Irvine, CA · On-site

$115K - $140K/yr

This role combines technical estimating, bid strategy, risk management, subcontractor engagement ... Prepare preliminary project schedules for bidding purposes. * Assist in preparation of schedule and ...

Uprite Construction

Junior Estimator

Irvine, CA · On-site

What You'll Do: * Assist with preparing conceptual and detailed construction estimates * Perform quantity takeoffs from drawings and specifications * Solicit, review, and analyze subcontractor and ...

SJ Amoroso Construction

Estimator

Irvine, CA

This role combines technical estimating, bid strategy, risk management, subcontractor engagement ... Prepare preliminary project schedules for bidding purposes. * Assist in preparation of schedule and ...

Meruelo Group LLC

Estimator

Riverside, CA · On-site

$135K - $165K/yr

Estimator Reports to: Director of Estimating Welcome to Herman Weissker, Inc. where we've been ... Key Responsibilities: * Assist in the updating and issuing of weekly Volume Tracking and Business ...

ProWest Constructors

Estimator

Wildomar, CA · On-site

Develop labor, material, and equipment pricing and build cost estimates * Assist with subcontractor outreach, bid tracking, and proposal comparisons * Help prepare bid packages, summaries, and final ...

S.J. Amoroso Construction

Senior Estimator

Irvine, CA · On-site

$150K - $200K/yr

Prepare preliminary project schedules for bidding purposes. * Assist in the preparation of project ... Lead estimate turnover meetings with operations and clearly communicate project scope, assumptions ...

SJ Amoroso Construction

Senior Estimator

Irvine, CA · On-site

Prepare preliminary project schedules for bidding purposes. * Assist in the preparation of project ... Lead estimate turnover meetings with operations and clearly communicate project scope, assumptions ...

ProWest Constructors

Estimator

Wildomar, CA · On-site

$110K - $160K/yr

Develop labor, material, and equipment pricing and build cost estimates * Assist with subcontractor outreach, bid tracking, and proposal comparisons * Help prepare bid packages, summaries, and final ...

Shimmick

Lead Estimator

Irvine, CA · On-site +1

$160K - $215K/yr

Expected to assist in the preparation of larger and more complex estimating assignments including overall estimating strategy. * Understands construction means, methods, and sequencing. * Understands ...

ServiceMaster

Estimator

Riverside, CA · On-site

... assist in being successful in this position. Xactimate experience is an essential requirement of this job. If you do not have experience with this software, you will not be considered for this ...

Black & Veatch

Estimator

Irvine, CA · Hybrid

$107K - $190K/yr

... to assist in preparation and review of lump sum, unit rate and cost plus estimates and in preparation of conceptual cost estmates. Project types include water and wastewater treatment facilities ...

UNAVAILABLE

Senior Estimator

Irvine, CA · On-site

$110 - $150/hr

Expected to assist in the preparation of larger and more complex estimating assignments including the Estimate Plan. * Understands Division costing structure (overheads, G&A, insurance, etc)

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Assistant Estimator information

See Riverside, CA salary details

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How much do assistant estimator jobs pay per hour?

As of Aug 20, 2026, the average hourly pay for assistant estimator in Riverside, CA is $25.81, according to ZipRecruiter salary data. Most workers in this role earn between $19.81 and $28.08 per hour, depending on experience, location, and employer.

What does an assistant estimator do?

An Assistant Estimator supports the lead estimator in calculating the costs and resources needed for construction or manufacturing projects. Their duties typically include gathering and analyzing data, reviewing project plans and specifications, preparing cost estimates, and helping create bids for potential projects. They also assist in sourcing materials, communicating with vendors and subcontractors, and maintaining records of estimates. This role is crucial in helping companies prepare competitive and accurate bids and ensuring projects stay within budget.

What are the key skills and qualifications needed to thrive as an assistant estimator, and why are they important?

To thrive as an Assistant Estimator, you need strong analytical abilities, attention to detail, and a background in construction or engineering, often supported by a relevant degree or coursework. Familiarity with estimation software such as Bluebeam, ProEst, or Microsoft Excel, as well as reading construction drawings, is typically required. Strong communication, time management, and teamwork skills help you coordinate effectively with project managers, suppliers, and clients. These competencies are essential to ensure accurate cost estimates, timely project delivery, and smooth collaboration within construction teams.

What are some common challenges faced by assistant estimators when preparing cost estimates, and how can they be managed?

Assistant Estimators often face challenges such as incomplete project documentation, fluctuating material costs, and tight deadlines. Managing these issues requires strong attention to detail, effective communication with project managers and suppliers, and the ability to adapt quickly to updated information. Building solid relationships with vendors and leveraging estimating software can also help streamline the process. Collaborating closely with senior estimators and other team members ensures more accurate and reliable estimates.

What is the difference between Assistant Estimator vs Estimator?

AspectAssistant EstimatorEstimator
CredentialsTypically requires a relevant diploma or degree, some industry experienceRequires more experience, often a degree in construction management or related field
Work EnvironmentSupports senior estimators, works in office and on-siteLeads cost estimation, interacts with clients and project teams
ResponsibilitiesPrepares initial estimates, gathers data, assists in bid preparationDevelops detailed cost estimates, reviews project plans, manages bid process

The main difference between an Assistant Estimator and an Estimator lies in experience and responsibility. An Assistant Estimator supports the estimation process with preliminary tasks, while an Estimator takes on more complex, independent responsibilities in preparing detailed project costs.

What is an assistant estimator?

An assistant estimator is a construction or engineering professional who supports senior estimators by gathering data, preparing cost estimates, and assisting with bid proposals. They often use estimating software and need strong math, organizational skills, and knowledge of construction materials and methods. This role typically involves working in an office environment and may require relevant certifications or training.

What are the most commonly searched types of Estimator jobs in Riverside, CA?

The most popular types of Estimator jobs in Riverside, CA are:

What are popular job titles related to Assistant Estimator jobs in Riverside, CA?

For Assistant Estimator jobs in Riverside, CA, the most frequently searched job titles are:

What job categories do people searching Assistant Estimator jobs in Riverside, CA look for?

The top searched job categories for Assistant Estimator jobs in Riverside, CA are:

What cities near Riverside, CA are hiring for Assistant Estimator jobs?

Cities near Riverside, CA with the most Assistant Estimator job openings:

Assistant Estimator jobs near you
Infographic showing various Assistant Estimator job openings in Riverside, CA as of August 2026, with employment types broken down into 2% As Needed, 75% Full Time, 20% Part Time, 1% Temporary, and 2% Contract. Highlights an 98% Physical, 1% Hybrid, and 1% Remote job distribution, with an average salary of $53,675 per year, or $25.8 per hour.

Plumbing Estimator Assistant

Superior Electrical, Mechanical & Plumbing, Inc.

Rancho Cucamonga, CA

$20 - $24/hr

Full-time

Medical, Retirement, PTO

Posted 5 days ago

Job description

Description

Superior Electrical, Mechanical, and Plumbing, Inc. is a trusted provider of commercial trade services, supporting new construction, tenant improvements, and a wide range of service projects. We are currently seeking a Plumbing Estimator Assistant to support the estimating team in preparing service estimates under the guidance of department management.


The ideal candidate will have understanding of commercial plumbing systems, materials, and applicable codes, along with experience contributing to accurate and competitive estimates for service work. In this role, you will assist in developing project estimates and change orders for a variety of commercial service projects. 


Schedule

  • Monday - Friday 8 a.m. to 4:30 p.m. 

Responsibilities

  • Interpret and review blueprints, project schematics and/or specifications to determine material and labor requirements
  • Prepare and submit plumbing proposals within the scope of commercial projects under the direction of management
  • Reference pricing quotes from internal departments, suppliers and subcontractors
  • Process a high volume of data entry to maintain and update estimating software and databases
  • Learn and apply new industry trends, materials, and best practices into estimates
  • Assist with processing commercial estimates for the maintenance department
  • Will be assigned additional clerical duties as needed to support the department

Requirements

  • Minimum of one year of recent experience in estimating commercial plumbing projects or similar industry 
  • Proficient knowledge of commercial plumbing systems, materials, and installation methods
  • Knowledge of local and national plumbing codes and regulations desired
  • Proficient utilizing estimating software and Microsoft Office Suite
  • Proficient alpha-numeric data entry with the ability to type a minimum of 40 WPM

About the Company

Superior Electrical, Mechanical & Plumbing, Inc. is a commercial service and construction company with over 20 years of experience delivering high-quality electrical and plumbing solutions across California and other states. Our team is committed to reliability, safety, and strong customer partnerships while supporting projects that keep businesses and facilities running efficiently.


Benefits

Superior EMP offers competitive compensation and a benefits package that includes:

  • Medical insurance
  • Employee-only 401(k) retirement contributions
  • Supplemental insurance options
  • Paid sick leave and vacation time
  • Opportunities for professional development and career growth

 Superior Electrical, Mechanical, and Plumbing, Inc. does not accept unsolicited resumes or outreach from third-party recruiters or agencies. Unsolicited emails, calls, or submissions will not be considered. 

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