Can a Standing Desk Fit Under a Low Window? A Sill-Height Guide in mm

Plenty of Australian home offices put the desk against a window for the natural light and the view. That works fine until the window sill sits low, around knee-to-waist height, and you start wondering whether a sit-stand desk will tuck neatly beneath it or leave the desktop stranded above the ledge. The whole decision comes down to a single measurement: how low the desk goes when it is fully lowered. This guide walks through the number that matters, how to measure your sill correctly in millimetres, and which frame type gives you the most room to work with.

The one spec that decides it: the desk's lowest height

A sit-stand desk travels between a minimum (seated) height and a maximum (standing) height. For a low window, only the minimum matters, because that is where the desktop rests when you sit. On DeskOne's electric sit-stand range, the lowest height is driven by whether the legs are two-stage or three-stage:

• Two-stage (dual motor) frames bottom out around 700mm. The S-Series Dual Motor frame, the U-Series, and the L-Shaped Corner dual-motor desk all quote a 700–1200mm range. Their lowest desktop position is roughly 700mm off the floor.
• Three-stage (triple motor) frames go lower, to about 620mm. The L-Shaped Triple Motor 3-Leg desk quotes 620–1270mm, so it drops around 80mm lower than the two-stage frames and rises higher too.
• The mobile Electric Overbed desk sits in between at 670–1110mm (single motor, 22mm/s), though its 40kg capacity and 900×400mm top make it a niche pick rather than a main workstation.

So if your sill is very low and you want the sitting surface to clear it, the three-stage frame's 620mm floor gives you the best chance. If your sill is around 720mm or higher, a standard two-stage frame at 700mm will already sit at or just below it.

How to measure your window sill (do this before you buy)

Grab a tape measure and work in millimetres for accuracy:

1. Measure from the finished floor to the underside of the sill (the point the desktop would meet if pushed back to the wall). Call this your sill height. Typical Australian sills land anywhere from 600mm in older cottages to 900mm-plus in newer builds.
2. Decide the goal. Do you want the seated desktop to sit below the sill so the window stays clear, or are you happy for the desktop to sit in front of the lower pane? For "below the sill," your target desktop height must be less than the sill height.
3. Subtract a clearance buffer of 20–30mm so the desktop never scrapes render, architrave, or a sill lip. If your sill is 700mm, aim for a seated desktop of 670–680mm or lower.
4. Account for the tabletop thickness on a frame-only purchase. If you buy the S-Series as a frame and add your own top, the frame's stated minimum is the frame height; add your tabletop thickness (E0 boards are commonly 18–25mm) to get the true surface height. On a complete desk, confirm on the product page whether the quoted minimum already includes the standard top.

Worked example: a 650mm sill with a 25mm top you supply yourself. A two-stage frame at 700mm minimum would put your surface near 725mm, sitting above the sill. A three-stage frame at 620mm minimum plus a 25mm top lands around 645mm, tucking the surface just under a 650mm sill with a whisker of clearance. That 80mm of extra travel is the difference between fitting under the ledge and not.

Two-stage versus three-stage for low sills

The practical takeaway is simple. Two-stage frames are perfectly comfortable for most adults, with 700mm covering a seated elbow height for people roughly 165cm and up. But they cannot physically drop below their 700mm floor. If your sill sits below about 720mm and you need the desktop under it, choose a three-stage frame for the extra ~80mm of downward travel. The three-stage L-Shaped desk also reaches 1270mm at the top, which suits taller standing users who found two-stage frames' 1200mm ceiling a touch short.

Both leg types on the range share the same core build: Q235 or cold-rolled steel frames, a lift speed of 35mm/s, running noise under 50dB, four memory presets so you can save your exact seated and standing heights, and a 1-year frame warranty. Weight capacity is 120kg on the S-Series, U-Series and triple-motor desk, and 100kg on the dual-motor L-Shaped Corner, so a low-window position does not force you to compromise on stability.

The catches nobody mentions

Two things surprise people who set a desk under a window. First, raising the desk to standing height moves the top upward, so the desktop and anything on it will rise across the lower window pane and partly cover it. That is normal and reversible, but worth picturing before you commit. Second, a monitor changes the maths: a monitor on a stand or a rear-clamp arm sits well above the desktop, so even a low seated surface will not keep a screen clear of a low window. If an unobstructed view matters, plan a deeper top so the monitor sits forward of the glass, or run a lower-profile screen setup.

Also check what hangs beneath the top. Under-desk cable trays, drawers, or a keyboard tray reduce the clearance between the top and your knees and, when the desk is at its lowest, between the underside and any sill lip or skirting board behind it. Measure with those accessories in mind, not just the bare frame.

Frequently Asked Questions

What is the lowest a DeskOne standing desk can go?
The lowest on the current electric range is about 620mm, on the L-Shaped Triple Motor 3-Leg desk (620–1270mm). Two-stage dual-motor frames such as the S-Series and U-Series bottom out around 700mm. Confirm on each product page whether the quoted minimum includes the standard tabletop.

Will a standing desk fit under a window sill that is 650mm high?
A two-stage frame at 700mm minimum will not drop the desktop below a 650mm sill. A three-stage frame at 620mm minimum, plus a thin top, can bring the surface to roughly 645mm, which tucks just under a 650mm sill with a small clearance buffer. Measure floor-to-sill first and subtract 20–30mm.

How do I measure my window sill for a desk?
Measure in millimetres from the finished floor to the underside of the sill where the desktop would meet the wall. Subtract a 20–30mm clearance buffer, then compare that figure to the desk's minimum height. On a frame-only purchase, add your tabletop thickness (commonly 18–25mm) to the frame minimum.

Does the desk block the window when I stand up?
Partly, yes. Raising the desk moves the top upward across the lower pane, so the desktop and anything on it will cover part of the window at standing height. It returns to the seated position at the touch of a memory preset, so the view is only obscured while you stand.

Two-stage or three-stage legs for a low window?
Choose three-stage if your sill sits below about 720mm and you want the seated desktop beneath it, because three-stage frames drop roughly 80mm lower (to ~620mm versus ~700mm). Two-stage frames are fine for higher sills and for most seated elbow heights.

Can I still keep the window clear with a monitor on the desk?
Not with a standard rear-clamp arm or monitor stand, which lift the screen well above the desktop regardless of how low the desk goes. To keep a low window clear, use a deeper top so the monitor sits forward of the glass, or a low-profile screen setup.

The bottom line

Fitting a sit-stand desk under a low window is a measuring job, not a guessing game. Note your sill height in millimetres, subtract a clearance buffer, and match it to the desk's minimum: about 700mm for two-stage frames, about 620mm for three-stage. Get those two numbers to agree and the desk will slot in cleanly, with the light and the view intact for the hours you spend seated. DeskOne offers a 7-day faulty-return window including freight, and the range carries a Judge.me rating of 4.8 stars across 90-plus reviews.

By James Whitfield, Melbourne