Diamond Island (Koh Pich) is a trophy-tier Class A submarket of Phnom Penh with average asking rent around $264/sqm/yr · ≈ $24.5 PSF/yr USD.
Master-planned post-2015 mixed-use district. · Tier: trophy · Avg rent: $264/sqm/yr · ≈ $24.5 PSF/yr USD
Diamond Island (Koh Pich) — the master-planned mixed-use redevelopment of a Mekong island — anchors Phnom Penh's principal post-2015 Class A frontier.
Banking, hospitality, retail HQs, expat services.
15–40,000 sqft floor plates available across newer Class A stock; 9'+ slab-to-slab and modern MEP common.
Bus; planned bridge upgrades.
Multi-modal transit captures the metro's principal professional catchment.
Diamond Island promenade, Sokha Hotel.
Diamond Island (Koh Pich) is one of 5 Class A submarkets we cover in Phnom Penh, classified as trophy tier with an average asking rent around $264/sqm/yr · ≈ $24.5 PSF/yr USD. Compared with the broader Phnom Penh Class A stock, Diamond Island (Koh Pich) typically attracts Banking, hospitality, retail HQs, expat services and competes most directly with the city's other trophy submarkets on building specification, transit access, and amenitisation.
Adjacent submarkets to study alongside Diamond Island (Koh Pich): Daun Penh, Boeung Keng Kang, Chamkar Mon / Toul Tom Poung, Sen Sok / Toul Kork. The full Phnom Penh submarket atlas is at /cities/phnom-penh.
For an institutional Class A occupier evaluating Diamond Island (Koh Pich), the highest-leverage analyses to commission next are the rent benchmark, the concession-package comparable, and the ESG performance baseline. Class A Atlas covers each as a dedicated topic page for this submarket:
Terminology specific to Phnom Penh Class A leasing and to the trophy tier: Class A, Trophy asset, Effective rent, Concession package, TI allowance, Submarket tier.
Reviewed by Class A Atlas Editorial Desk — House byline · global editorial team. Last updated 2026-04-15. See our methodology and editorial standards.