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Shutter frame corners and components laid out on a wood table, the parts that make up a custom plantation shutter

April 28, 2026 · Updated June 2, 2026

How to measure your windows for shutters before a free consultation

By Dave HarrisCo-founder, Golden West Shutters

You do not have to measure your own windows before a shutter consultation. Golden West sends a measurer to your home, takes every dimension by hand, and those numbers are the ones that go on the order. Your job is to understand what they are doing, not to get it perfect.

Still, a rough pass before the visit helps. It makes the consultation faster, it gives you a clearer sense of project scope, and it helps you catch an obstruction the conversation might otherwise skip past. This is the same prep we walk Orange County homeowners through when they ask how to get ready.

Here is what to look at, why it matters, and what Golden West verifies when our measurer arrives.

What is the difference between an inside mount and an outside mount

An inside mount sits the shutter frame inside the window opening, flush with the wall. An outside mount fixes the frame to the wall around the opening, so the shutter covers the window like a picture frame. Inside mount is the cleaner look and the more common choice, but it depends on having enough depth inside the opening.

Outside mount is the answer when the opening is too shallow, too far out of square, or blocked by hardware. Neither is better in the abstract. The opening decides. When you walk your windows ahead of the visit, you do not have to pick. You just want to notice which openings look deep and clean and which look tight or obstructed.

The three-point method for width and height

Measure the inside width of the opening at three places: top, middle, and bottom. Then measure the inside height at three places: left, middle, and right. Write down all six numbers. The point is not one clean dimension. The point is to see whether the three numbers agree.

If your three widths land within an eighth of an inch of each other, the opening is square. If they vary by more than a quarter inch, the opening is out of square, and the shutter has to be built to compensate. Many older Orange County homes, especially anything from the 1970s or earlier, have settled a little out of square. From Anaheim Hills to San Clemente, this is normal. It is not a flaw, just a fact the factory needs.

What is a depth check, and why does inside mount depend on it

A depth check measures how far it is from the front edge of the opening back to the glass. That clearance is what lets an inside-mount shutter close its frame flush and tilt its louvers without the louvers hitting the glass. It is the single measurement most homeowners skip, and it decides whether inside mount is even possible.

Look at the window from the side, or open it if it opens, and measure from the wall edge back to the glass. Most plantation shutters want a clear depth in the range of one and a half to two and a half inches for a clean inside mount. Less than that, and you are likely looking at an outside mount or a different frame style. Crank-out windows, sliders, and windows with internal hardware make the depth math tighter, so flag those.

Common DIY measuring mistakes

The errors that throw off a measurement are predictable. You can avoid most of them just by knowing they exist. None of these will sink your project, because the measurer catches them, but they are the reason a rough pass and the real measure sometimes disagree.

  • Measuring only once instead of at three points, which hides an out-of-square opening
  • Skipping the depth check, then assuming inside mount when the opening is too shallow
  • Measuring to the trim or sill instead of to the actual inside of the opening
  • Missing hardware that sticks into the opening, like cranks, locks, or alarm sensors
  • Using a cloth tape or guessing, instead of a metal tape that holds a straight line

Mapping obstructions before the visit

Walk each window and look for anything that protrudes into the opening. These are the details that change a shutter design, and spotting them early makes the consultation more useful. Take a photo of anything you are unsure about.

  • Window cranks on casement and awning windows
  • Sliding-window locks and latches
  • Alarm sensors mounted in the frame
  • Sills or trim that sit inside the opening
  • Existing blinds or treatments mounted inside the frame

Some of these are easy to work around. Some call for a specific frame or mount choice. The measurer needs to see them up front, so a quick note next to the affected window keeps the design honest.

What Golden West verifies, and why the free measure matters

When our measurer arrives, every dimension gets taken again by hand. This is not about distrust. Golden West mills and finishes every shutter at our own factory in Lake Forest, and a custom-built panel works to a tight tolerance. A half-inch error is the difference between a panel that closes flush and one that binds.

Our measurer also checks things a homeowner usually cannot. They read the opening for square against a proper level, check the surrounding wall for plumb, and confirm the mounting surfaces for the install hardware. Because the same company measures, builds, and installs, there is no handoff between a salesperson and a far-off factory where a number can get lost.

What to bring to the consultation

If you did a rough pass, bring it. Your notes give the conversation a head start, even though the measurer takes the official numbers. A simple list is plenty.

  • Width, height, and depth notes for each window
  • A flag on any window that seemed tight on depth or out of square
  • A note on any window with hardware or an obstruction in the opening
  • The rooms you most want to prioritize
  • Photos of anything you have a question about, like a bay window, French door, or arched top

Golden West has built shutters for more than 60,000 Orange County homes since 1987, and we have measured every kind of opening across Irvine, Newport Beach, Mission Viejo, and Lake Forest. You do not need to get the numbers right. You just need to be ready to talk through your windows, and we handle the rest, from the measure to a fit that lasts under a lifetime warranty. To set up a free in-home measure, call Dave and John's team at 949-951-0600, or stop by the Lake Forest showroom.

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