Permitting delays are often blamed on agencies, utilities, or changing requirements. In reality, many of the most common setbacks are already baked into a project before drawings are ever submitted.

Developers who know what to look for can spot early warning signs that signal future redesign, extended reviews, or construction challenges. Catching these issues before permitting begins can save months of time and significant cost.

Below are five engineering red flags that frequently show up on stalled solar projects.

1. Incomplete or Unverified Site Information

Engineering decisions are only as reliable as the data behind them. Missing surveys, outdated utility information, or assumptions about existing conditions often surface during permitting reviews.

When agencies or utilities question site accuracy, designs must be revised and resubmitted. This slows approvals and creates downstream risk.

2. Utility Requirements Not Reflected in Design

Projects often advance before interconnection standards are fully understood. This leads to designs that appear complete but conflict with utility requirements once reviewed.

Adjustments at this stage can trigger major revisions that affect equipment selection, layout, and protection schemes.

3. Overly Aggressive Value Engineering

Cost pressure before permitting can push teams to remove design elements without fully understanding the impact. While some value engineering is effective, poorly timed cuts can raise red flags during review.

Agencies may request additional justification, and construction teams may later struggle with designs that lack flexibility.

4. Permitting Strategy Treated as an Afterthought

Permitting is not just a submission step. Each jurisdiction has preferences, interpretations, and review patterns that should inform design decisions early.

When engineering does not account for local permitting expectations, review cycles become longer and less predictable.

5. Limited Coordination Between Design and Construction

Permitting sets the foundation for construction. Designs that meet code but ignore constructability often pass initial review only to create issues later.

Early coordination helps ensure that permitted drawings support efficient installation rather than forcing changes after approval.

Catching Issues Before They Compound

None of these red flags guarantee failure on their own. The problem arises when they stack together and limit a project’s ability to adapt.

Developers who address these issues before permitting create smoother reviews, stronger construction outcomes, and more reliable schedules.

Early engineering discipline is one of the most effective tools for reducing permitting risk and protecting project momentum.