APD’s 5-Step Retrofit Process

June 9, 2026

Simplifying Complex Rollouts

Successful retrofit projects require more than good design. They require accurate information, proactive communication, and a team that understands how to navigate the challenges that can delay schedules, increase costs, and disrupt operations.

At APD Engineering & Architecture, our proven 5-step retrofit process helps clients reduce risk, improve consistency, and accelerate project delivery. By combining technology, collaboration, and decades of experience, we serve as a trusted partner from initial assessment through construction completion and beyond.

1.

Due Diligence

Every project begins with understanding the existing environment. Our team conducts permitting research, reviews available documentation, and identifies potential challenges early in the process. This upfront planning helps clients make informed decisions, establish a clear path forward, and avoid costly surprises later.

Man reviewing architectural plans on dual monitors, engaged in site planning at APD Engineering office.

2.

Site Survey

Using coordinated field surveys and LiDAR scanning technology, we capture accurate existing conditions data. This information creates a reliable foundation for design, improves project coordination, and helps minimize field conflicts during construction.

3.

Existing Conditions Modeling

We transform survey data into detailed Revit models and digital representations of existing facilities. These models provide project teams with a clear understanding of existing conditions and support better communication, coordination, and decision-making throughout the project lifecycle. 

Person in red analyzing architectural design on dual monitors.

4.

Concept Design

Our architects and engineers develop practical retrofit solutions that align with operational goals, brand standards, schedules, and budgets. Because our designs are based on accurate field information, clients gain confidence that solutions can be successfully implemented in the field.

5.

Construction Documents, Permitting, and Construction Administration

From documentation and permitting through construction support, APD remains engaged throughout project delivery. Our team works proactively to keep projects moving, resolve issues efficiently, and provide responsive communication every step of the way.

Construction manager reviews plans on tablet at building site.

A Partner Through Every Phase

What makes APD different is our commitment to partnership. We understand the challenges our clients face, and we work collaboratively to reduce uncertainty, improve coordination, and keep projects on track.

For more than 30 years, clients have trusted APD to provide responsive service, technical expertise, and dependable support from design through construction. Our 24-hour response commitment, combined with our integrated project approach, helps clients navigate complex retrofit programs with greater efficiency and confidence.

Retrofit projects are rarely simple, but the process does not have to be. Through accurate data, integrated expertise, and responsive project management, APD helps clients reduce uncertainty, maintain momentum, and deliver successful rollout programs with fewer disruptions, stronger coordination, and more predictable outcomes.

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