For builders, developers, and property owners across Washington, Idaho, and California. Established 1996. Based in Moses Lake since 2002.
Structural and civil engineering under one roof. From foundation design to permit-ready drawings, we handle the full technical scope so your project moves forward.
Best for: Homes, additions, remodels, ADUs, and custom builds.
Practical engineering for foundations, framing, lateral systems, retaining walls, and permit-ready residential drawings.
Best for: Office, retail, restaurant, auto, industrial, and mixed-use buildings.
Structural and civil engineering for commercial projects that need clear drawings, buildable details, and permit-ready coordination.
Best for: Apartments, mixed-use buildings, and multi-unit housing.
Coordinated structural and civil engineering for multifamily projects, including multi-story wood-frame construction and site infrastructure.
Not sure what type of engineering your project needs? Send us the plans and we will help define the scope, timeline, and fee estimate at no charge. Or browse our Resources for answers to common questions about Washington permits, project timelines, and working with engineers.
Send Your PlansAll drawings are stamped and signed by John S. Lovrovich, PE, licensed in Washington, Idaho, and California.
We deliver clear, stamped drawing sets with the detail building departments and contractors need to move your project forward.
We work directly with owners, architects, contractors, and building departments throughout the project lifecycle.
Based in Moses Lake since 2002, with deep regional knowledge of Grant County soils, local building departments, and the contractors who build throughout Central Washington.
Civil and structural engineering across residential, commercial, industrial, and multifamily project types throughout Washington, Idaho, and California.
Multi-story wood-frame apartment building with structural and lateral system design.
Barrel aging warehouse structural design supporting heavy stacked storage loads.
Auto dealership showroom and service facility with structural design for large open spans.
Professional office building structural design with tenant improvement coordination.
Retail and market hall building with structural and site civil engineering.
Lakeside restaurant with stone facade, mixed-material structural design, and outdoor dining area.
Quick-service restaurant building with kitchen, dining, and site planning support.
Multifamily housing complex with wood-frame structural design and on-site amenities.
Agricultural seed processing facility with structural design for heavy equipment loads.
Multi-building self-storage facility with structural design and site civil engineering.
Memorial gazebo structural design for a campus healing garden honoring lost students.
Modern orthodontic office with curved roofline requiring custom structural detailing.
Auto dealership building with structural design and site planning.
Four reasons clients in Moses Lake, Grant County, and across the Pacific Northwest trust JSL Engineering for their most important projects.
With nearly 30 years of practice across Central and Eastern Washington, our team brings field-tested judgment built from decades of work on residential, commercial, and multifamily projects.
Most projects need both structural and civil expertise. JSL provides integrated engineering from foundation design to site grading, which reduces coordination complexity and keeps your project moving forward.
We engineer for real-world construction, not just paper calculations. Our drawings are clear, dimensioned, and built around the questions contractors actually ask in the field.
You'll know where your project stands. We work directly with project owners, general contractors, architects, and building departments so communication stays clear throughout the project.
From your first inquiry to final permit-ready drawings. Here is what to expect when working with JSL Engineering.
Call, email, or fill out the form below. Describe your project scope, location, and goals. Share any plans, sketches, or documents you have.
We review your project and provide a clear proposal with engineering scope, estimated fee, and project schedule. Clear terms up front.
We develop the engineering design, coordinate with your architect or contractor, and keep you informed at each key milestone.
You receive a stamped, permit-ready drawing set. We stay available to respond to any building department plan review comments.
A focused, experienced team that treats every project with the care and attention it deserves.
John established JSL Engineering in 1996. The firm has been based in Moses Lake since 2002. Licensed in WA, ID, and CA, he leads all engineering design and brings 30+ years of experience to every residential, commercial, and multifamily project.
Through Pen and Compass, Roger supports JSL Engineering with precise drafting and documentation services. He helps turn engineering designs into clear, permit-ready drawing sets for residential, commercial, and multifamily projects.
Nicholas manages financial operations, client billing, and business development for JSL. His finance background helps the firm run efficiently so the engineering team stays focused on delivering quality work.
Tom supports JSL's daily operations and client communications, helping maintain the reliable, responsive experience clients have come to expect from a firm with nearly three decades of engineering practice in Central Washington.
"We've had the pleasure of working with JSL Engineering LLC, and we can't say enough good things about the experience… Looking forward to more projects together!"
"I recently purchased a commercial property that I'm developing in Moses Lake, and I can't recommend JSL Engineering LLC enough! The city had a lot of requirements, which could have been overwhelming, but JSL made the entire design process incredibly smooth and easy."
Answers to the questions we hear most often, written by John Lovrovich, P.E.
Not every home addition needs a Professional Engineer. Here's how to tell when one is required, what they look at, and what to expect on a residential project.
Read the guideSoil conditions, seismic zones, snow and wind loads, and local permit jurisdictions. A primer for residential, commercial, and multifamily projects in Grant County, Washington.
Read the guideFrom the first phone call to stamped drawings in your hands, here's what an honest project timeline looks like and the factors that can speed it up or slow it down.
Read the guideEverything you need to know about working with JSL Engineering. Have a question not listed here? Call or email us directly.
Call 509-989-4890JSL works on a wide range of projects including single-family homes, additions and remodels, apartment complexes, commercial buildings, office and retail spaces, restaurants, automotive dealerships, industrial and agricultural facilities, storage facilities, and civic structures across Washington, Idaho, and California.
JSL Engineering is licensed in Washington State, Idaho, and California. The majority of our work is in Central and Eastern Washington, including Moses Lake, Grant County, the Columbia Basin, and the Tri-Cities area. We also regularly serve clients in North Idaho and have completed projects in California.
Yes. While headquartered in Moses Lake, we regularly serve clients throughout Grant County, Eastern Washington, the Wenatchee Valley, the Tri-Cities region, and beyond. We are licensed in Washington, Idaho, and California and work with clients across all three states.
The process starts with a conversation about your project. We review the scope and provide a proposal with engineering scope, fee, and timeline. After authorization, we develop the engineering design and coordinate with your team. The deliverable is a complete set of stamped, permit-ready drawings. We stay available for plan review responses during the permit process.
Structural engineering focuses on the building itself: foundations, framing, beams, columns, shear walls, and the load-bearing systems that keep a structure safe. Civil engineering addresses the site: grading, drainage, utilities, access, and stormwater management. Many projects need both, and JSL provides both disciplines in-house.
Many projects need both. Architects handle design, floor plans, and occupancy-related building codes. Structural engineers handle the technical systems that make the structure safe. We work alongside architects regularly and can help coordinate the right team for your project. Read our full guide on the difference →
Yes. Structural assessments are a regular part of our work. Whether you are adding to an existing home, converting a commercial space, or need a structural letter for a real estate transaction, we can evaluate existing conditions and provide the documentation you need.
Absolutely. We work directly with general contractors and construction teams on a regular basis. We respond to RFIs and field questions promptly, and we understand that contractors need practical, buildable drawings, not just calculations on paper.
Fill out the contact form below, call us at 509-989-4890, or email jslengineeringllc@outlook.com. Share a brief description of your project, location, and any plans or documents you have. We will follow up to discuss scope and provide a fee proposal.
We are available Monday through Friday, 9:00 AM to 5:00 PM Pacific Time. You can reach us by phone at 509-989-4890 or by email at jslengineeringllc@outlook.com. We aim to respond to all inquiries within one business day.
Tell us about your project and we will get back to you with next steps.
Send plans, sketches, or project details and we will follow up within one business day.
Share your project details below. Send plans, sketches, or documents and we will follow up with next steps and a fee estimate.