Evans-Cromwell: HVAC and Plumbing Design Experts in Kent, WA

For over a decade, Evans-Cromwell has provided specialized mechanical design services to contractors and builders in Kent, WA and surrounding communities. The firm focuses on the critical planning stage, creating the drawings mechanical contractors need to pull permits and move projects forward.

Business Overview

Evans-Cromwell operates from its Kent, WA office with a team of four dedicated professionals. They work standard business hours, Monday through Friday, serving the commercial construction sector. Their role is foundational, helping contractors navigate the permit process with accurate, jurisdiction-approved designs for HVAC and plumbing systems.

Key Services

The company’s work centers on design for commercial mechanical systems. This includes:

• Commercial HVAC system design for rooftops, ductwork, and specialized DOAS applications.
• Plumbing system design and inspection planning.
• Preparation of complete permit-ready drawing sets for mechanical contractors.
• Design for specialized environments, including exhaust systems for hazardous materials.

Their services meet a clear need in the local construction industry, where many contractors don’t have a full-time mechanical engineer on staff.

Areas Served

Evans-Cromwell primarily serves Kent WA and Des Moines WA. Their long history in the region means they understand the building styles, common materials, and specific code requirements of South King County. This local knowledge helps streamline the approval process for projects in these communities.

Company History

Jim Evans founded Evans-Cromwell in 2013 after retiring from a career in mechanical systems forensics. He missed the work and saw a gap in the market. Most mechanical contractors needed engineering support for permits but couldn’t justify a full-time hire. Jim started the business to fill that need, applying over 50 years of industry experience to help local contractors succeed.

Leadership

Owner Jim Evans is a mechanical engineer who graduated in 1964. His career began with large-scale design-build projects in California, later moving to complex refinery piping and hazardous gas systems worldwide. He settled in Washington in the early 1990s, focusing on commercial HVAC design. His deep technical background, from exotic gas exhaust to modern office climate systems, forms the backbone of the company’s expertise.

Specialties & Highlights

A few key points set Evans-Cromwell apart:

• 54 Years of Design Experience: Jim’s career spans over five decades in HVAC and plumbing system design.
• Contractor-Focused Model: They act as the engineering department for mechanical contractors who need permit drawings.
• Complex System Knowledge: From refinery piping to commercial rooftop units, they handle intricate design challenges.
• Local Jurisdiction Familiarity: Based in Kent WA, they know the permit processes of area building departments.

Why Locals Choose Evans-Cromwell

Builders and contractors in Kent and Des Moines turn to Evans-Cromwell for reliable, permit-ready designs. The combination of Jim’s extensive engineering history and the firm’s focused service model provides a practical solution for the construction industry. They help projects start on time by handling the critical design and approval paperwork, building long-term relationships through consistent, knowledgeable support. For specialized mechanical design in Kent, WA, Evans-Cromwell offers seasoned expertise.