South Flagler House vs. Maison d’Or vs. Edgeworth: Which South Flagler Waterfront Building Is Right for You?

Three ultra-luxury condominiums are rising on the same stretch of South Flagler Drive in West Palm Beach, and they are not competing for the same buyer. South Flagler House delivers first — 108 residences by Robert A.M. Stern Architects for Related Ross, from $5.7 million to $29.2 million, in Q3 2027. Maison d’Or is the scarcity play — just 39 residences across 18 stories by Kolter Urban, from $5.8 million to $15 million, in Q4 2028. Edgeworth is the largest and last — 190 residences in two Kohn Pedersen Fox towers by Related Ross and Frisbie Group, from $5.3 million to $35.5 million, in Q4 2029. All three front the Intracoastal. All three sit minutes from the Royal Park Bridge to Palm Beach Island. The decision comes down to three variables: how soon you need keys, how much exclusivity you are buying, and where your price ceiling sits.

The Corridor: South Flagler Drive in 2026

South Flagler Drive is West Palm Beach’s most established waterfront address — a historic Intracoastal-front boulevard of brick streets and mature banyan canopy, steps from Palm Beach Island via the Royal Park Bridge and minutes from Worth Avenue, Antique Row, the Norton Museum of Art, and the Kravis Center.

What changed is the capital. New luxury towers on South Flagler have traded at $2,500–$4,000+ per square foot, driven by permanent relocation from the Northeast, financial-sector expansion, and a waterfront supply that cannot be widened. Three buildings now define the top of that pipeline — and they arrive in sequence rather than all at once, which is itself a factor for buyers who care about resale timing.

The Side-by-Side Comparison

	South Flagler House	Maison d’Or	Edgeworth
Price range	$5.7M – $29.2M	$5.8M – $15M	$5.3M – $35.5M
Residences	108	39	190
Stories	—	18	32
Delivery	Q3 2027	Q4 2028	Q4 2029
Status	Under construction	Pre-construction, sales open	Pre-construction
Developer	Related Ross / Related Companies NY	Kolter Urban + Perko Development	Related Ross + Frisbie Group
Architect	Robert A.M. Stern Architects (RAMSA)	10 Design	Kohn Pedersen Fox (KPF)
Interiors	Pembrooke & Ives	HBA (Hirsch Bedner Associates)	March & White Design (MAWD)
Views	Intracoastal + Palm Beach Island	Intracoastal + Ocean	Intracoastal, Atlantic + Palm Beach Island
Hotel branded?	No	No	No

South Flagler House: The One You Can Move Into First

South Flagler House is under construction and scheduled for Q3 2027 — roughly a year ahead of Maison d’Or and two ahead of Edgeworth. For a buyer relocating on a school calendar or exiting a Northeast property on a fixed timeline, that gap is the entire decision.

It is also the RAMSA building. Robert A.M. Stern Architects’ neo-classical vocabulary — with interiors by Pembrooke & Ives — is the most architecturally traditional of the three. In this market, that has been an asset. Waterfront product with fewer than 150 residences and a RAMSA signature has consistently outperformed on resale. The building spans a genuinely wide price band: an entry buyer at $5.7M and a penthouse buyer at $29.2M live in the same lobby.

Related Ross’s sales velocity at South Flagler House is the most important commercial signal on the corridor: the project crossed $500 million in pre-construction sales in Q1 2026 alone — before either of the other two buildings had launched sales. That absorption rate in a market with no hotel branding validates the RAMSA pedigree and the corridor’s fundamental demand.

Best for: buyers who want delivery soonest, prefer traditional architecture, and value an institutional developer with a long Palm Beach County track record.

Maison d’Or: The Scarcity Argument

Thirty-nine residences. That is the number that matters. Maison d’Or is less than half the size of South Flagler House and roughly a fifth of Edgeworth — and its residences run from approximately 3,000 to more than 10,000 square feet, meaning the building is not simply smaller, it is composed of substantially larger homes.

Developed by Kolter Urban with Perko Development Partners — the same Kolter Urban that delivered Rosewood Residences Hillsboro Beach, one of the most critically successful branded residences in the South Florida pipeline — with architecture by 10 Design and interiors by Hirsch Bedner Associates (the firm behind multiple Four Seasons and Ritz-Carlton hotel interiors globally), Maison d’Or is priced from $5.8M to $15M for Q4 2028 delivery.

Note the ceiling. At $15M, Maison d’Or has the lowest top-end of the three, despite having the highest entry price. This is the most uniformly ultra-luxury building of the set — every neighbour bought at a comparable level. There is no wide-entry-tier buyer in the lobby; the resident profile is consistent from floor to floor. Its name — French for “House of Gold” — reflects the building’s design logic: the east-west Intracoastal orientation captures both sunrise over the Intracoastal and sunset over Palm Beach Island, with the building’s golden light at both.

Boutique low-density waterfront is the hardest product to replicate on South Flagler, because the land to build it on is effectively gone. Maison d’Or is the last of its kind on this corridor.

Best for: buyers for whom exclusivity and unit size outrank delivery date, and who want a building where the resident profile is consistent from floor to floor.

Edgeworth: The Widest Range and the Longest Horizon

Edgeworth is the newest to market and the largest: 190 residences across two 32-story Kohn Pedersen Fox towers, by Related Ross and Frisbie Group. Residences run one to five bedrooms, priced from $5.3M to $35.5M, with delivery estimated Q4 2029.

KPF — the firm responsible for 10 Hudson Yards, One Vanderbilt, the International Commerce Centre in Hong Kong, and the Shanghai World Financial Center — brings the most globally prominent contemporary architecture practice to the South Flagler corridor. Where RAMSA’s South Flagler House applies prewar classicism and 10 Design’s Maison d’Or applies Mediterranean-Regency warmth, KPF’s twin curved towers read as a modern architectural statement — the building designed for the WPB buyer whose aesthetic vocabulary is contemporary rather than traditional.

Two things distinguish Edgeworth beyond its architecture. First, the range — a $5.3M entry and a $35.5M ceiling is the broadest spread on the corridor, with the lowest cost of entry to a new South Flagler waterfront building alongside the highest absolute ceiling of any WPB new development. Second, the site: Edgeworth reimagines the Family Church grounds with enhanced civic and education facilities, creating a calmer, more walkable setting connected to downtown dining, Clematis Street, and the Royal Park Bridge.

The trade is time. A Q4 2029 delivery means the longest deposit horizon of the three — but for buyers who are positioning rather than relocating, a later delivery in a supply-constrained market has historically been a feature rather than a cost.

Best for: buyers optimising entry price or reaching for the highest ceiling on the corridor, and who are comfortable with a 2029 timeline.

How to Choose: One Line Each

• Need it soonest, want RAMSA? South Flagler House, Q3 2027.
• Want the rarest building and the largest floorplates? Maison d’Or, 39 residences.
• Want the lowest entry or the highest ceiling on South Flagler? Edgeworth, $5.3M–$35.5M.

Two of the three — South Flagler House and Edgeworth — are Related Ross projects, which means a buyer comparing them is comparing two products from the same developer at different points on the delivery curve. That is a conversation worth having directly with the developer’s sales team or with an independent buyer’s broker who represents all three.

The Corridor in Context: What These Three Buildings Are Not

All three are design-led rather than hotel-branded. None of them is a Mandarin Oriental, Ritz-Carlton, Banyan Tree, or Mr. C. The South Flagler corridor’s new residential buildings are priced and designed as pure residential — the amenity programmes are deep, the developer credibility is real, but the daily service model is a managed residential building rather than a branded hospitality operation.

Buyers seeking branded hospitality residences in West Palm Beach should evaluate the four active branded projects: Mandarin Oriental Residences WPB (87 units, Safdie Architects, from $3.9M, delivering 2031), The Ritz-Carlton Residences WPB (138 units, Arquitectonica, from $2.5M, delivering Spring 2028), Banyan Tree Residences WPB (OMA/Koolhaas, Yabu Pushelberg, delivering 2028), and Mr. C Residences WPB (Terra Group, Cipriani family, delivering 2027).

Pricing, availability, and delivery timelines are subject to change. HL Real Estate Group can provide current pricing, floor plans, brochures, and private preview access for all three buildings — backed by 20+ years of Haute Living developer relationships.