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Assistant Estimator Jobs in Rialto, CA (NOW HIRING)

Estimator

Corona, CA · On-site

$26/hr

In this role, you will assist the company in making profitable business decisions by gathering information and preparing accurate estimates. The ideal candidate is analytical, detail-oriented, and ...

Estimator

Corona, CA · On-site

$26/hr

In this role, you will assist the company in making profitable business decisions by gathering information and preparing accurate estimates. The ideal candidate is analytical, detail-oriented, and ...

Estimator

Corona, CA · On-site

$26/hr

In this role, you will assist the company in making profitable business decisions by gathering information and preparing accurate estimates. The ideal candidate is analytical, detail-oriented, and ...

Identifies, and acts upon, potential lines of business and new client prospects to assist with ... Senior level estimators may oversee work of Project Engineers or lower level Estimators External ...

Identifies, and acts upon, potential lines of business and new client prospects to assist with ... Senior level estimators may oversee work of Project Engineers or lower level Estimators External ...

The Estimator will also assist with budgeting, value engineering, cost tracking, and maintaining historical cost data to improve future estimates and competitiveness. Qualifications: * Strong ...

Prepare budgets, subcontracts, purchase orders and assist in preliminary project schedules. * Follow awarded contracts as assigned. May include estimating extra work items, change orders, credits ...

Estimator

Brea, CA · On-site

$80K - $150K/yr

Prepare budgets, subcontracts, purchase orders and assist in preliminary project schedules. * Follow awarded contracts as assigned. May include estimating extra work items, change orders, credits ...

This position will assist with each assigned bid or proposal with performing quantity takeoffs, pricing and preparation of estimates. Key Duties and Responsibilities Estimating & Bid Preparation

New

Estimator

Riverside, CA · On-site

$25 - $30/hr

... 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 ...

Estimator

Riverside, CA · On-site

$25 - $35/hr

... 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 ...

Estimator

Lake Elsinore, CA · On-site

$30 - $40/hr

... 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 ...

Estimator

Yorba Linda, CA · On-site

$27/hr

Summary The Estimator is responsible for preparing accurate and timely cost estimates and ... Support cost reduction initiatives and process improvements * Assist with updating labor standards ...

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 ...

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 ...

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Assistant Estimator information

See Rialto, CA salary details

$16

$24

$42

How much do assistant estimator jobs pay per hour?

As of Aug 30, 2026, the average hourly pay for assistant estimator in Rialto, CA is $24.80, according to ZipRecruiter salary data. Most workers in this role earn between $19.04 and $27.02 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 Rialto, CA?

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

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

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

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

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

Infographic showing various Assistant Estimator job openings in Rialto, CA as of August 2026, with employment types broken down into 95% Full Time, and 5% Part Time. Highlights an 95% In-person, and 5% Remote job distribution, with an average salary of $51,592 per year, or $24.8 per hour.

Construction Bid & Document Coordinator

Ontario, CA • On-site

Great Hire
201 - 500 employees

$55K/yr

Full-time

Medical, Dental, Vision, PTO

Re-posted 2 days ago


Job description

We're looking for a highly organized and detailoriented Bid Coordinator to support our estimating and operations teams. This role is ideal for someone who thrives in a fastpaced environment, enjoys keeping projects organized, and is interested in building a longterm career in the construction industry. You'll work closely with estimators, subcontractors, and internal teams to ensure bids, documents, and project information are accurate, complete, and delivered on time.

This position offers handson exposure to estimating, project setup, and construction operations-with a clear path for growth. Requirements Core Requirements Minimum 1-2+ years of experience in construction administration, estimating support, or general office coordination Strong proficiency in Microsoft Office (Excel, Outlook, Word) Ability to read and interpret blueprints at a basic level Experience using Bluebeam for plan viewing, markups, or measurements Familiarity with Monday.com, BuildingConnected, or similar workflow/bid management platforms Strong organizational skills with the ability to manage multiple deadlines High attention to detail and accuracy-critical for maintaining bid logs and project documentation Excellent written and verbal communication skills Ability to work in a fastpaced, deadlinedriven environment Proactive, selfstarter mindset with strong followup habits Ability to maintain confidentiality and handle sensitive project information Comfortable coordinating with subcontractors, vendors, and internal teams Preferred Qualifications Prior experience supporting estimating, bidding, subcontractor outreach, or pre-qualification processes Construction industry knowledge (terminology, trades, project phases) Experience with shipping coordination (UPS, USPS, GLS, FedEx) Experience with vehicle or permit tracking (Motor Carrier Permit, business licenses, etc.) Experience booking travel or accommodation for field personnel Benefits Compensation & Benefits Salary: $55,000 annually Medical insurance: Company pays ~90% of base plan for employee + dependents Dental & vision insurance available Paid holidays Paid time off (after introductory period) Location: Ontario, CA Schedule: Mon-Thurs 8:00 AM-4:30 PM | Fri 7:00 AM-3:30 PM Growth Opportunity Clear advancement path: Bid Coordinator Assistant Estimator Estimator Handson exposure to estimating, project setup, and construction operations Opportunity to grow within a stable and expanding company


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About Great Hire

Sourced by ZipRecruiter

Based in Orange County CA, Great Hire is a Full Service Temporary Staffing Services Provider and Direct Hire Recruiting firm that prides itself on personal attention at an affordable price. With a presence in Orange County, Los Angeles, Anaheim, La Mirada, Panorama City, Simi Valley, Ontario, Temecula, Riverside & San Bernardino we are in the sweet spot in our Industry. We are large enough to properly service any sized Company, but small enough to be unconstrained by pure volume considerations.

Company size

201 - 500 Employees

Headquarters location

Irvine, CA, US

Year founded

2011

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