The 50% Rule
A general guideline: if the cost of repairing the current gate exceeds 50% of a full replacement, replace it. Below that, repair. The trouble is most homeowners don't have honest numbers for either side, so installers can frame "repair vs replace" however suits them.
Below we'll walk through how to put real numbers on both options so you can decide based on your actual situation, not a pushed pitch.
When To Repair (Or Just Retrofit)
The gate frame is structurally sound, with no major rust through. Hinges, posts, and pillars are solid. Only the motor, control board, or accessories are failing. The design and finish are still fine with you.
In this case, a motor-and-board retrofit runs $1,500–$2,800 and gives you another 10–15 years from the gate. Don't throw out a perfectly good steel gate just because the motor is dead.
When To Replace
Visible rust-through at the bottom rails or main verticals — fabrication is past saving. The gate is sagging badly and hinges/pillars are damaged. Multiple repairs in the last 2–3 years totalling $2,000+. You're renovating the front of the house and the gate looks outdated. You want smart features or a sliding gate where you currently have swing (or vice versa).
Full replacement of a residential auto gate including new fabrication, motor, controls, and accessories runs $4,000–$8,000 for mild steel, $5,500–$12,000 for aluminium. If you're facing $3,000+ in cumulative repairs over the next 2 years, replacement is usually the right call.
What To Keep When Replacing
Pillars and posts: usually keep these unless they're cracked or moving. Saves $800–$2,000 in groundwork. Power supply and conduit: usually keep if installed properly. Saves $200–$500. Photocell mounts: can sometimes be reused depending on positioning.
Old motors and control boards: don't keep. Even if they "still work," mixing 12-year-old electronics with new fabrication is a poor decision. New motor, new board, new sensors.
Disposal And Demolition
Removing the old gate and disposing of it adds $300–$700 depending on size and weight. Most installers fold this into the replacement quote — make sure it's itemised so you're not surprised. The old motor and steel are usually recycled by the installer's scrap dealer.
If you're replacing pillars too, factor in 1–2 extra days for masonry curing before the new gate can be hung. Plan for a gap of 3–5 days where you have no gate at all, and inform your household.
How To Decide Properly
Get two quotes: one for full repair of the current gate, one for full replacement with a comparable spec. If the gap is less than 50%, replace. If it's 50–80%, replace if you plan to stay 10+ years; repair if you're selling soon. If it's more than 80%, repair makes sense in almost every case.
WhatsApp us a photo of your current gate and a brief on what's been going wrong. We'll send an installer for an honest assessment — not a sales pitch dressed up as one.
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