Gangnam reconstruction boom sparks high-end window war

Competition in the premium window segment is set to intensify as Gangnam-area reconstruction projects shift into high gear. Eunma Apartments in Daechi-dong — widely regarded as one of the most coveted reconstruction sites in the country — received project implementation plan approval for the first time in 25 years, and contractor selection for Apgujeong zones 2 through 5 recently wrapped up, triggering a full-scale bidding war among building materials companies.

The combined scale of key Seoul redevelopment sites — including the so-called "Ap-Yeo-Mok-Seong" cluster of Apgujeong, Yeouido, Mokdong and Seongsu — is estimated at up to 80 trillion won ($51.5 billion), encompassing more than 80,000 units, according to industry sources Thursday. The sheer size of the market has drawn strong interest from both construction companies and building materials suppliers.

Demand for premium windows has been rising sharply among reconstruction association members. Windows are installed once and used for decades, so buyers increasingly prioritize long-term satisfaction over upfront cost. They also shape views, a sense of openness and the overall quality of interior design. "Apgujeong associations are positioning their projects as top-tier residential complexes, so many of them want European raw materials even for the windows," an official at one construction company said.

Window makers have responded by putting European premium credentials front and center. LX Hausys is targeting the reconstruction market with Fenest, its flagship imported aluminum system window line. Fenest is built on products from Reynaers, a Belgian specialist in aluminum system windows, and optimized for Korea's residential environment. The line can produce oversized windows reaching up to about 4 meters in height, and a design that embeds the frame flush into the floor and ceiling creates the impression of a wall filled entirely with glass.

LX Hausys has also tailored its pitch to the specific characteristics of each redevelopment zone. For Apgujeong and Seongsu, where Han River views are a defining selling point, the company is promoting a wide-format, view-optimized design exclusive to Fenest that goes beyond conventional window configurations. "Fenest is currently installed at Hyundai E&C's showroom in Apgujeong Zone 3 and GS Construction's showroom in Seongsu Zone 1, where it has been receiving strong reviews," a company official said.

Hyundai L&C has partnered with Rehau, one of Germany's three leading window manufacturers, to push into the premium segment. The recently unveiled renewal version of the Rehau R-7 uses insulation-specialized materials and a new frame structure that minimizes cold-air infiltration, achieving insulation performance roughly 30 percent better than the benchmark for Korea's top energy-efficiency rating.

Hyundai L&C also plans to accelerate sales targeting Gangnam-area reconstruction complexes by leading with an integrated package that adds European hardwood flooring and faucets. The company recently signed exclusive domestic distribution agreements with Italian timber specialist Florian for hardwood flooring and German luxury bathroom materials firm Koiko for faucets.

KCC is pushing into key Gangnam reconstruction sites with its premium window brand Klenze. The line features a four-sided edge-seal structure and a quadruple-glazing system that boost both insulation and airtightness, while a slim frame design enhances the sense of openness. A soft-closing mechanism and other user-friendly features are also built in. The flagship M700 model delivers high-efficiency performance through its four-sided horizontal seal and quadruple glazing, while the Z300 meets Korea's top energy-efficiency rating standard.

Klenze has been specified at Olympic Park Foreon — the country's largest reconstruction complex — as well as a remodeling project in Jamwon-dong and major reconstruction sites in the Seocho area, expanding its standing as a premium brand, the company said.

KCC is also stepping up experiential marketing. Through its "The Klenze Gallery" showrooms in Seocho-dong, Seoul, and Busan, customers can experience the product's performance and design firsthand in spaces that closely replicate real residential environments. "We plan to accelerate our push into the reconstruction market by strengthening a premium strategy built around Klenze — one that encompasses performance, design, construction quality and hands-on service," a KCC official said.