A Century of Tin Smelting Ends in Butterworth — Potential 40 Acres Straits City Re-development

For more than a hundred years, a tin smelter defined the industrial skyline of Butterworth. It is gone now — and the freehold land it stood on is being turned into one of the largest mixed-use redevelopments on the Penang mainland.

Who MSC is

Malaysia Smelting Corporation Berhad (Bursa: 5916) is one of the world’s leading integrated tin producers — unusual in that it spans the full chain, from mining tin ore through smelting and refining to delivering refined tin to customers. Most players do one or the other. Its refined tin and solder end up in semiconductor and electronics manufacturing, which ties it fairly directly to the same industry driving demand across Penang and Kulim.

The group runs three segments: tin smelting (the largest revenue contributor), tin mining, and a smaller investments arm. Annual revenue runs in the region of RM1.5 billion to RM1.7 billion. Roughly 52% of MSC is held by Singapore-listed The Straits Trading Company, which matters a great deal to the land story below.

On the numbers, briefly: MSC has had a strong run on the back of tin prices, which touched an all-time high of about US$59,000 a tonne on 2 June. Second-quarter profit attributable to owners more than doubled to RM34.02 million, on revenue up 68% to RM637.27 million.

The move: Butterworth to Pulau Indah

MSC announced in September 2018 that it would relocate smelting from Butterworth to a new plant at Pulau Indah in Klang, Selangor. The new facility uses top submerged lance technology, which delivers better yield, lower operating cost through improved thermal efficiency, and a smaller environmental footprint than the plant it replaced.

The transition was deliberately slow. The Butterworth plant kept processing remaining tin intermediates for years while capacity shifted south, and smelting is now consolidated at Pulau Indah. For a site that had been running since the early 1900s, closing it was less an event than a decade-long wind-down.

The land: about 40 acres, freehold, next to Penang Sentral

This is the part worth paying attention to.

When MSC filed the plan with Bursa Malaysia in 2018, its smelting plant sat on 13.9 acres in Butterworth, with parent Straits Trading holding 26.2 adjoining acres — 40.1 acres in total. More recent reporting puts the working split at roughly 24 acres held by Straits Trading and 16 by MSC, on the same approximately 40-acre footprint.

The land is freehold, and it sits five to ten minutes’ drive from Penang Sentral, the integrated rail, ferry and bus hub on the mainland.

MSC’s then-chief executive Datuk Dr Patrick Yong framed the logic at the time: Butterworth was becoming an attractive location for residential and commercial development as growth spilled from the island onto the mainland, helped by the Penang Transport Masterplan improving connectivity. Straits Trading executive chairman Chew Gek Khim — who also chairs MSC — said the owners were open to joint-venture partners, developing it themselves, or selling, noting that freehold land would appeal to a wide range of investors and developers.

They chose to build it themselves.

Straits City: RM4.6 billion, running to 2038

The 40 acres are being developed as Straits City, a mixed-use masterplan with an estimated gross development value of RM4.6 billion. Work began in 2022 under a roughly 16-year programme targeting completion around 2038.

• Phase one is finished. The Crowne Plaza Penang Straits City, a 23-storey five-star hotel, was completed in September 2024 and opened in February 2025.
• Phase two is serviced apartments, aimed at professionals and workers from the surrounding industrial zones.
• Phase three brings commercial space — offices and retail.

Straits Trading’s land is being developed first. MSC’s parcel — the actual smelter site — comes last, and for good reason: the plant must be demolished, then decontaminated over roughly two to three years, then rehabilitated. Redevelopment of the MSC portion is not expected to begin until several years after demolition completes.

Chew has described Straits City as an ambitious project, with the intention of building a smart city with modern connected infrastructure.

What it means for industrial and land players

• This is the clearest brownfield conversion case study on the mainland. A century-old heavy-industrial site, freehold, next to a transport hub, converting to hotel, residential and commercial over 16 years. Anyone holding ageing industrial land in Seberang Perai now has a live, visible benchmark for what that land can become — and how long it takes.

• Decontamination is the hidden cost, and it is measured in years, not months. Two to three years of remediation before rehabilitation, before construction. If you are valuing an old industrial site with a long production history, that timeline and its cost belong in the numbers. It is the single most underestimated line item in converting heavy-industrial land.

• Industrial demand is what makes the residential phase work. The serviced apartments are explicitly aimed at workers from surrounding industrial zones, with spillover from Batu Kawan and Kulim cited as underpinning demand. The mainland’s industrial expansion and its residential absorption are the same story told twice.

• Watch what heavy industry leaving actually unlocks. MSC moved to Pulau Indah for operational reasons — better technology, lower cost, port access. The property outcome was a by-product. Other legacy plants sitting on well-located mainland land may face the same arithmetic.