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Assistant Estimator Jobs in Rialto, CA (NOW HIRING)

Bid Coordinator Assistant Estimator Estimator Handson exposure to estimating, project setup, and construction operations Opportunity to grow within a stable and expanding company

Estimator

Corona, CA ยท 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 ยท 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 ยท 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 ...

Estimator

Ontario, CA ยท On-site

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 ...

Estimator

Orange, CA ยท On-site

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

Estimator

Brea, CA ยท 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 ...

Estimator

Brea, CA ยท 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 ...

Estimator

Riverside, CA ยท 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 ยท 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

Riverside, CA ยท 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 ...

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

San Bernardino, CA ยท On-site

$41K - $52K/yr

Use QuickBooks to assist with invoicing, job costing, and other administrative tasks. * Coordinate with production teams to ensure projects move smoothly from estimate to completion. * Maintain ...

Estimator

Riverside, CA ยท 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 ...

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Assistant Estimator information

See Rialto, CA salary details

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How much do assistant estimator jobs pay per hour?

As of Aug 9, 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 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 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 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 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 100% Full Time. Highlights an 60% In-person, and 40% Hybrid job distribution, with an average salary of $51,592 per year, or $24.8 per hour.

JUNIOR / ASSISTANT ESTIMATOR - CONSTRUCTION FIRM FULL-TIME

J Harris Construction, Inc.

Riverside, CA โ€ข On-site

Other

Posted 3 days ago

New


Job description

Great opportunity to grow in the construction industry. The Estimating Assistant will be responsible for assisting the estimating department with all facets of the bidding process such as: researching, gathering and preparing proposals, ensure all bid requirements are met (mandatory job walks, pre-solicitations, etc.).