JLG 1200SJP Telescopic Boom Lift: Specs, Price and Buying Guide

Last updated: October 2026

The JLG 1200SJP is a 120 ft telescopic boom lift from JLG’s Ultra Series. It reaches a 126 ft working height and 75 ft of horizontal outreach, carries up to 1,000 lb in its restricted range, and has an 8 ft JibPLUS jib that articulates up and down and swings side to side. It is one of the tallest self-propelled boom lifts in common use, built for high steel, tall facades, stadiums and industrial plants.

This guide covers the 1200SJP’s specs and features, how it compares to other 120 to 135 ft boom lifts, what it sells for used on FleetNow, and what to check before you buy one.

In this guide:

• JLG 1200SJP specs
• Key features
• How it compares
• Pros and cons
• Common uses
• JLG 1200SJP price
• What to check before buying used
• JLG safety video
• FAQs

Specs are for the current ANSI model from JLG and dealer spec sheets. Older 1200SJPs use earlier engines and can differ slightly in weight, so check the serial plate and spec decal on any unit you buy.

• Dual capacity: The platform carries 1,000 lb within a restricted range or 500 lb across the full working envelope. That lets crews bring heavier tools and materials up when the work is closer in.
• JibPLUS jib: The 8 ft jib moves 130° up and down and 180° side to side, so operators can reach over obstacles and position the platform without moving the whole machine.
• Fast lift: JLG rates the 1200SJP to go from the ground to 120 ft in about 95 seconds.
• High-strength steel boom: The boom is built from 100,000 psi steel, which keeps it stiff at full extension.
• Extendable axles: The axles retract to 8 ft 2 in for transport and extend to 12 ft 6 in for stability at height.
• 4WD and steering modes: Full-time four-wheel drive and 45% gradeability help on rough job sites, with selectable steering modes for tight spaces.
• Telematics: Newer units come with an LED motion/amber beacon and ClearSky Smart Fleet connectivity hardware for tracking location, hours and fault codes.

The JLG 1350SJP is the 1200SJP’s taller sibling (see our JLG 1350SJP guide). It adds 15 ft of height and 5 ft of outreach for about 4,000 lb more weight and a higher used price. The Genie SX-125 XC sits between them on height and carries 660 lb across its full range, the most of the three. On a tighter budget, older Genie S-125 lifts list on FleetNow for about $44,000 to $85,000. If you need to reach up and over obstacles, compare the articulating JLG 1250AJP. For lighter jobs, an 86 ft JLG 860SJ costs far less to buy and transport.

Used prices are asking prices on FleetNow in October 2026. Specs are from manufacturer and dealer spec sheets.

For most buyers, the trade-off is height versus cost and transport. If 120 ft covers your work, the 1200SJP is usually cheaper to buy and move than a 135 ft lift.

• Steel erection and high-rise construction: setting and bolting steel, curtain wall and glazing work.
• Industrial plants and refineries: maintenance on tanks, stacks, pipe racks and tall equipment.
• Stadiums, arenas and convention centers: lighting, rigging, signage and roof structure work.
• Bridges and infrastructure: inspection and repair where the lift can work from the ground.
• Utilities and telecom: work on towers, poles and structures that need more than 100 ft of reach.
• Film and events: camera and lighting positions at height.

Not sure which boom type fits your job? Our guide to boom lift types compares telescopic, articulating and towable lifts.

Here is what used JLG 1200SJPs list for on FleetNow by model year. These are asking prices from 9 priced listings in October 2026, and they change often.

Most listings fall between $79,950 and $109,950, with a midpoint around $90,000. Hours on these units ranged from about 740 to 3,800. Condition, hours, inspection history and whether the jib and load-sensing systems work properly matter more than model year alone. JLG dealers price new 1200SJPs by quote.

• Annual inspection and service records: Ask for the most recent annual inspection and any boom, jib or turntable repairs.
• Boom wear pads and sections: Look for scoring, uneven wear and play between sections, and listen for chatter as the boom extends.
• Jib and rotator: Run the jib through its full up, down and side-to-side range and check the platform rotator for drift.
• Turntable bearing: Check for excess rock or noise when the boom swings.
• Hydraulics: Look for leaks at cylinders, hoses and the swing motor, and check the oil for contamination.
• Axle extension and oscillation: Extend and retract the axles and confirm the interlocks prevent lifting with the axles retracted.
• Load sensing, tilt alarm and controls: Test every function from both the ground and platform controls, including the emergency stop and auxiliary lowering.
• Engine and emissions: Check for smoke, warning lights and, on Tier 4 units, a clean DPF and DEF system history.
• Tires and chassis: Inspect the foam-filled tires for chunking and the frame for cracks or weld repairs.

Buying from a distance? Ask the seller for photos of the hour meter, serial plate and spec decal, and a video of the boom and jib at full extension. The FleetNow Inspect app can help you document a machine’s condition.

This JLG video covers safe operation of the 1200SJP and 1350SJP. It is an overview and does not replace operator training. Anyone running a boom lift needs training and familiarization on the specific model they use.

FleetNow lists used JLG 1200SJP boom lifts and other telescopic boom lifts from dealers and owners across the country, including JLG and Genie models. You can also browse all boom lifts or JLG boom lifts.

Questions about a listing? Contact our team or call 1-216-973-5124. Have a boom lift to sell? List your equipment on FleetNow.

For a smaller JLG telescopic boom, read our JLG 860SJ review.