Glass replacement costs: what counts as a unit and what it really means
Every glass unit prices the same in our repair model, but a windscreen with ADAS costs more to fit than a side window. What the flat rate covers and misses.
REPAIR · 4 min read
What our model counts as a glass unit
The Analyzer prices every glass unit the same way: one flat rate per pane, roughly £250 in the UK at independent/used-parts rates, £350 in the US. That covers a windscreen, a side window, a rear screen or a quarter light, counted individually, whatever the listing photos show broken or missing. It is a simplification on purpose, a fast way to price a category that can otherwise have five or six wildly different real-world prices, and it is close enough for most single-pane damage. Where it understates the real bill is the one job below.
The one glass job the flat rate underprices
A windscreen on any car built in roughly the last decade is rarely just glass. If the car has lane-keep assist, adaptive cruise or automatic emergency braking, the windscreen carries the forward-facing camera bracket, and UK bodyshops now routinely add £150 to £300 on top of the glass itself for an ADAS recalibration, either static (in a workshop, with targets) or dynamic (a calibration drive), depending on the manufacturer. A basic side or rear window replacement almost never needs this. A windscreen on anything from the last ten years usually does, so treat a broken windscreen on an ADAS-equipped car as the flat rate plus a real recalibration line, not the flat rate alone.
Reading which pane it actually is
Listing photos usually make this easy to tell apart even without a written damage note: a starred or spidered pane directly ahead of the driver with a visible camera housing near the mirror is the windscreen, the one to check for ADAS. A missing or smashed pane at a rear corner, in a door, or with no camera bracket visible is a standard side or rear unit, no recalibration to budget. Multiple broken panes on the same lot, common after a rollover or a multi-point impact, is the case most likely to be underpriced by a single flat-rate count, since each unit adds its own labour time even though the parts cost is similar.
Set the count, then sanity-check the total
Glass is one of the few damage fields in the Analyzer that is a straight count rather than a severity tier, so the main risk is under-counting from a photo set that does not show every angle, not mispricing a tier. Count every pane the listing or photos confirm as broken, missing or heavily cracked, then add the ADAS line separately in your own head (or in the editable per-unit price) if the windscreen is one of them and the car is a newer model with camera-assisted safety features. That keeps the flat rate useful for the common case without letting the one job it does not fully capture quietly eat your margin.