How to Measure Windows for Shutters Correctly

A plantation shutter only looks truly built-in when it is measured for the window, not simply ordered to a rough size. A few millimetres can affect how panels open, whether louvres clear the handle, and how neatly the frame sits against the wall. If you are researching how to measure windows for shutters before requesting a quote, the right approach is to record accurate opening sizes and the details around them - then have the final measure confirmed by a specialist.

Custom shutters are designed around the realities of your home: slightly uneven plaster, deep reveals, security screens, protruding handles and skirting boards. Taking careful initial measurements helps establish what is possible and gives your shutter consultant the information needed to recommend the best fit.

Start by choosing the shutter mounting style

The first question is whether your shutters will sit inside the window recess or over the face of the wall. This decision changes every measurement that follows.

A recess fit places the shutter frame within the existing window opening. It gives a clean, streamlined look and suits windows with enough depth for the shutter frame, louvres and opening panels. Recess-mounted shutters are popular in bedrooms, living rooms and newer homes with square, generous reveals.

A face-fit installation places the shutter frame over the opening, fixed to the architrave or surrounding wall. It is often the better option when the recess is shallow, out of square, obstructed by a window winder, or occupied by a security screen. Face fitting can also provide better coverage around the window, which is useful where privacy and light control are priorities.

Neither option is automatically better. The best choice depends on your window depth, trim, handles and how you need the shutters to operate. Measure first, but avoid making deductions yourself for frame clearances. Custom shutter systems have their own allowances, and these should be calculated during the final site measure.

What you need before measuring windows for shutters

Use a rigid steel tape measure marked in millimetres, rather than a cloth tape or a phone measuring app. A pencil, notepad and mobile camera are also useful. Photograph each window straight on, then photograph the side of the recess and any handles, locks or winders.

For every window, give it a simple name such as “main bedroom front window” or “kitchen sliding door”. Write down the width, height and depth separately. It sounds basic, but clear notes prevent mix-ups when several windows have similar dimensions.

Measure in millimetres and write each figure exactly as shown. Do not round a measurement up or down. Older Melbourne homes in particular can have openings that look square but vary noticeably from top to bottom.

How to measure windows for shutters in a recess

For a recess fit, you need to know the opening width, height and usable depth. Take all measurements from the inside edges of the recess where the shutter frame would sit, not from the glass or the outside edge of the architrave.

Measure the width at three points

Measure horizontally across the recess at the top, centre and bottom. Record all three figures. The smallest width is especially important because it identifies the tightest point in the opening. Do not assume the plaster or timber lining is perfectly parallel.

Also look for anything that reduces the usable width. Tile returns, uneven render, an internal window winder or a projecting lock can all affect where the shutter frame can sit.

Measure the height at three points

Measure vertically from the top of the recess to the sill at the left, centre and right. Again, record every measurement. If there is no sill, measure to the point where the shutter frame will finish.

Pay close attention to sloping sills. A noticeable slope may require a tailored solution so panels hang correctly and close cleanly. This is one reason a professional final measure is worth arranging before production begins.

Check recess depth and obstructions

Measure from the front edge of the recess back towards the glass or window frame. Take this measurement at several points if the recess includes tiles, a timber reveal or uneven plaster. Your shutters need enough clear depth for the selected louvre size and frame, plus room for panels to operate without striking the window fittings.

Check the position of handles, locks, winders and flyscreens. A handle that projects into the opening may mean the shutter needs a deeper frame, a cut-out, a different panel arrangement or a face-fit installation. Do not overlook sliding windows, where tracks and handles can create clearance issues.

Measuring for face-fit plantation shutters

Face-fit shutters are measured from the area where the frame will be fixed, rather than the opening alone. The goal is to cover the window neatly while allowing for a secure fixing surface and enough room to open the panels.

Measure the intended overall width and height of the shutter frame. This is usually wider and taller than the window opening, but the exact overlap depends on the architrave, wall space and nearby features such as cornices, light switches or cabinetry.

For width, measure the available flat fixing area on both sides of the opening. For height, check the available space above and below it. If fitting over an architrave, measure the trim itself and confirm it is wide enough for the chosen frame. A narrow or decorative architrave may not offer a suitable fixing point.

Also consider how the panels will open. Full-height shutters need clear space at the side of the window when opened, particularly near furniture, benchtops or adjacent doors. In tighter spaces, a different panel split or bi-fold configuration may be more practical.

Record the details that affect the final design

Window measurements tell only part of the story. Plantation shutters are made to suit how you use each room, so note the features that influence the design.

Consider whether the window opens inward, slides, tilts or includes a winder. Note security screens, plantation-style exterior awnings, deep window sills and split-level floors. For bathrooms and kitchens, identify areas exposed to moisture, as PVC shutters may be the more practical choice. Basswood shutters offer a refined timber finish for many living areas and bedrooms, while material selection should also suit the room’s conditions and your preferred look.

Think about what you want the shutters to do. Wide louvres can create a more open view when tilted, while smaller louvres may suit certain window proportions. A mid-rail lets the upper and lower louvres be adjusted separately, giving you privacy below while daylight enters from above. These choices affect panel layout, but they should follow the window’s proportions rather than work against them.

Common measuring mistakes to avoid

The most common mistake is providing only one width and one height. A single figure hides uneven walls and can lead to an inaccurate expectation of the final fit. Always measure at three points for a recess.

Another mistake is measuring the glass instead of the opening or fixing area. Shutters are framed window furnishings, so the relevant dimensions are the recess or the surface supporting the frame.

Avoid making your own clearance deductions. It can be tempting to subtract a few millimetres “just in case”, but that may leave unnecessary gaps that reduce the finished look and allow more light through. A shutter specialist will apply the correct allowances for the selected frame and mounting method.

Finally, do not ignore the practical details around the window. A beautiful shutter design is of little use if it blocks access to a winder, clashes with a handle or cannot open because of a nearby cupboard.

Why a professional final measure matters

Your initial measurements are ideal for discussing options and obtaining an informed quote. Before custom-made shutters are manufactured, however, a professional site measure confirms every critical detail: recess depth, wall condition, level, squareness, fixing points, panel configuration and operating clearances.

At Victoria Plantation Shutters, this consultation-led approach helps ensure your shutters are tailored to the window and the way your household uses the space. It also gives you the opportunity to compare PVC and basswood options, discuss louvre sizes and decide whether a recess or face fit will deliver the best result.

Take clear measurements, photos and notes to your free quote consultation. From there, the final measure can turn a good idea into shutters that sit neatly, operate smoothly and add lasting value to your home.