Cement maker Sampyo bets on 79-story supertall on former ready-mix site in Seongsu

Sampyo Group, best known as a cement and ready-mix concrete company, is reinventing itself as a supertall developer in Seongsu-dong, Seoul. The group plans to build a mixed-use complex rising up to 79 stories and 360 meters on the site of a ready-mix plant that supplied concrete to the capital for 45 years. It has also begun building a proprietary brand for the project. The move signals a fundamental shift for Sampyo — from raw-materials supplier to a company that conceives, brands and operates its own spaces.

Sampyo Group is pursuing the SGL (Sampyo Global Landmark) project on the former Sampyo Ready-Mix factory site in Seongsu-dong 1-ga, Seongdong-gu, Seoul, industry sources said Tuesday. The plan calls for transforming the land near Seoul Forest into a supertall mixed-use complex combining office, commercial and residential uses. At 79 stories and 360 meters, Sampyo believes SGL would become the second-tallest building in Seoul after Lotte World Tower if completed as designed.

The Seongsu-dong site is where Sampyo's past and future converge. The Sampyo Ready-Mix plant there began operation in 1977 and for nearly half a century served as a key supply base for concrete used in Seoul's development — from the Hyundai apartment complex in Apgujeong to financial and industrial office buildings, roads and bridges. Over time, however, the plant drew complaints about pollution, traffic and noise, and it was demolished in 2022. In its place, Sampyo now envisions a supertall landmark adjoining Seoul Forest.

Sampyo intends to develop SGL as a single integrated complex brand encompassing a hotel, branded residences, prime office space and retail. To that end, the group is reinforcing its internal brand organization and is reportedly recruiting a brand director with more than 15 years of experience in large-scale development projects.

Industry observers note that Sampyo moved early to focus on branding for the Seongsu project. Where the success of mixed-use developments once hinged largely on location and the contractor's name, the ultra-premium development market now treats a project's identity and its operational track record as key drivers of asset value. The more a development blends residential, hotel, retail and office uses within a single complex, the more critical it becomes to tie the name, service, circulation and tenant mix together under one coherent brand strategy.

Sampyo's internal structure has also changed. The group established a dedicated Seongsu Project Headquarters last year and has been expanding its staff. Rodrigo Bilbao, a president with global real estate development experience, is leading the development side, while Seok Hui-cheol, a president who worked on the construction of Lotte World Tower in Jamsil, is overseeing construction. The headquarters currently includes 12 executives — among them president-level officers, senior managing directors and directors — and the total headcount stands at around 50.

Sampyo is also adding staff in product planning, design, procurement and technology. The group plans to grow the organization further to build a full-cycle developer structure covering everything from development to operations. That a company once known for cement, ready-mix concrete and aggregates is now assembling a dedicated supertall development team and searching for a brand chief shows that Sampyo's business transformation goes well beyond simply making use of a vacant site.

Sampyo's vision for SGL is a "future city embracing the forest" — a mixed-use hub for business, commerce and culture that connects Seoul Forest, the Han River and the broader Seongsu-dong urban fabric. Plans include a multi-level pedestrian deck linking the complex directly to Seoul Forest, drawing the entire site into the park's living zone. If the project aligns with the development of the Seongsu Strategic Improvement Zone, it could significantly reshape the skyline of northeastern Seoul.

The transformation of Seongsu-dong itself reinforces Sampyo's decision. Once defined by its light-industrial character, the neighborhood has in recent years become one of Seoul's most sought-after commercial districts, drawing fashion labels, food and beverage concepts, startups and pop-up stores. Its proximity to Seoul Forest and the Han River has made it a rare area where demand for office, residential and retail space converges. For Sampyo, a site it operated as a factory for decades has become not merely an asset to sell, but a stage on which to define the group's next direction.

The DMC Susaek Development Project, which Sampyo is carrying out in the Jeungsan-dong area of Eunpyeong-gu, Seoul, is the company's first real test of its real estate development capabilities. Construction has passed the 60 percent completion mark, with an April next year target for completion. The project will produce a mixed-use residential and commercial complex comprising three buildings with five below-ground floors and 36 above-ground floors.

The DMC Susaek project also includes plans to relocate Sampyo Group's headquarters. The office building is to serve as the group's new home after completion. If SGL is the long-term vision, DMC Susaek is Sampyo's first report card as a developer entering the market in its own right. The company has long supplied the cement and ready-mix concrete that go into other people's buildings; now it is committing its own technology and capital to build and operate structures itself.

The project also showcases Sampyo's own building materials technology. The company has applied its proprietary low-carbon, eco-friendly cement "Blument" and its specialty concrete "Bluecon" series on site — products designed to reduce quality degradation, construction delays and environmental impact in supertall buildings. A building materials company is thus building a reference portfolio by applying its own technology on its own development site.

That dynamic illustrates why Sampyo is pursuing the developer pivot. The cement, ready-mix and aggregate industry has long been classified as traditional manufacturing, highly sensitive to input costs, logistics, supply-demand swings and environmental regulation, with profitability closely tied to unit prices, volumes and haulage distances. The developer business, by contrast, brings together land value, planning capability, financial structuring, leasing operations and brand equity. The shift is an attempt to move beyond the profitability ceiling of manufacturing and find new value in developing and operating spaces.

The market sees the SGL project as a potential inflection point for Sampyo's corporate identity. The company has until now been associated with ready-mix trucks, cement plants and aggregate operations. If SGL becomes a reality, Sampyo will also be known as a real estate developer with a supertall landmark next to Seoul Forest. Factory relocation, site development, application of eco-friendly construction materials, a new headquarters and a proprietary brand — brought together as a single narrative, they amount to a reinvention of the group's story.

Significant challenges remain. A 360-meter supertall building faces a long list of hurdles: permits, traffic, environmental review, view-corridor concerns and community acceptance. The location beside Seoul Forest and the Han River is an asset, but it also invites scrutiny over public interest and visual impact on the skyline. A sluggish construction market, interest rate pressures and shifting supply-demand dynamics in the office sector add further uncertainty. Whether Sampyo can translate the technical competitiveness it has built in manufacturing into genuine profitability and operational capability as a developer remains the central question.

"We plan to strengthen our brand strategy by adding staff to the existing brand division," a Sampyo Group official said. "By applying our proprietary low-carbon, eco-friendly, high-performance materials directly in the construction of our new headquarters, we are building market confidence in our technology." The official added that the company intends to "use the quality and technical capabilities verified at Susaek as a foundation for real estate development, and bring together the group's full capabilities to complete the Seongsu project."