--- title: "Seaport, Boston — Class A submarket" description: "Boston's newest trophy quarter." canonical: https://classa.info/cities/boston/seaport pageType: neighborhood lastUpdated: 2026-04-15T00:00:00.000Z license: "CC BY 4.0 with attribution to Class A Atlas (https://classa.info)." --- > Seaport is a trophy-tier Class A submarket of Boston with average asking rent around $85/sqft/yr. ## TL;DR - Newest trophy quarter. - Strong tech and life-sciences tilt. - Waterfront amenity. # Seaport, Boston — Class A submarket *Boston's newest trophy quarter.* · Tier: trophy · Avg rent: $85/sqft/yr ## TL;DR - Newest trophy quarter. - Strong tech and life-sciences tilt. - Waterfront amenity. ## Overview The Seaport delivered a decade of new [Class A](/glossary/class-a) office and lab. Strong tech, life-sciences, and financial-services tenancy. Now mid-cycle through lease-up of the latest deliveries. ## Tenant profile Tech, life sciences, financial services, professional services. ## Typical specification 25-40,000 sqft floor plates. ## Transit MBTA Silver Line (BRT to South Station and Logan Airport). Silver Line provides direct Logan and South Station access. ## Amenities Boston Harbor waterfront, ICA, Seaport Common. ## Comparable buildings - **121 Seaport Boulevard** [](https://www.google.com/maps/search/?api=1&query=121%20Seaport%20Boulevard%2C%20121%20Seaport%20Boulevard%2C%20Boston%2C%20MA%2002210%2C%20Seaport%2C%20Boston%2C%20United%20States&query_place_id=ChIJoZ-xir1x44kRInkX57HRbPc) - **10 World Trade** [](https://www.google.com/maps/search/?api=1&query=10%20World%20Trade%2C%2010%20World%20Trade%20Center%2C%20Boston%2C%20MA%2002210%2C%20Seaport%2C%20Boston%2C%20United%20States&query_place_id=ChIJ0cX5h3hw44kRf8cD5AfCgyQ) ## Where Seaport sits in Boston Seaport is one of 6 Class A submarkets we cover in Boston, classified as [trophy tier](/topics/trophy-asset-selection) with an average asking rent around $85/sqft/yr. Compared with the broader Boston Class A stock, Seaport typically attracts Tech, life sciences, financial services, professional services and competes most directly with the city's other trophy submarkets on building specification, transit access, and [amenitisation](/glossary/amenitisation). Adjacent submarkets to study alongside Seaport: [Financial District](/cities/boston/financial-district), [Cambridge & Kendall Square](/cities/boston/cambridge-kendall), [Back Bay](/cities/boston/back-bay), [Kendall Square](/cities/boston/kendall-square). The full Boston submarket atlas is at [/cities/boston](/cities/boston). ## Topic deep-dives for Seaport For an institutional Class A occupier evaluating Seaport, 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: - [Seaport — ](/cities/boston/seaport/rents-and-availability) - [Seaport — ](/cities/boston/seaport/tenant-profile) - [Seaport — ](/cities/boston/seaport/transit-and-commute) - [Seaport — ](/cities/boston/seaport/amenity-and-lifestyle) - [Seaport — ](/cities/boston/seaport/trophy-and-comparables) - [Seaport — ](/cities/boston/seaport/fit-out-and-spec) ## Related glossary Terminology specific to Boston Class A leasing and to the trophy tier: [Class A](/glossary/class-a), [Trophy asset](/glossary/trophy-asset), [Effective rent](/glossary/effective-rent), [Concession package](/glossary/concession-package), [TI allowance](/glossary/ti-allowance), [Submarket tier](/glossary/submarket-tier). ## Editorial provenance Reviewed by [**Miriam Hollander**](/about/authors/miriam-hollander) — Lead market analyst. Last updated 2026-04-15. See our [methodology](/about/methodology) and [editorial standards](/about/editorial-standards). ### Primary sources for this page - [CBRE Marketview reports](https://www.cbre.com/insights) — CBRE - [JLL Office Insight](https://www.jll.com/en/trends-and-insights) — JLL - [Cushman & Wakefield Marketbeat](https://www.cushmanwakefield.com/en/insights) — Cushman & Wakefield - [Savills World Research](https://www.savills.com/research_articles/) — Savills - [Colliers Global Office Outlook](https://www.colliers.com/en/research) — Colliers [Full sources index](/about/sources) · [Submit a correction](/about/corrections) ## Related topics - [**Class A Lease Negotiation**](/topics/class-a-lease-negotiation) — How to negotiate a Class A office lease — the playbook from LOI to signed deal. - [**Hybrid Workplace Strategy**](/topics/hybrid-workplace-strategy) — How to size, structure, and lease a Class A office for a hybrid workforce. - [**ESG / LEED for Tenants**](/topics/esg-leed-tenants) — How tenants evaluate, negotiate, and report on ESG performance in a Class A office lease. - [**Cross-border Expansion**](/topics/cross-border-expansion) — How to run a coordinated Class A office search across multiple geographies. - [**Fit-out Capex**](/topics/fit-out-capex) — How to budget, sequence, and govern Class A office [fit-out](/topics/fit-out-capex)">fit-out capex. - [**Lease vs Flex**](/topics/lease-vs-flex) — When premium flex (coworking, [managed office](/glossary/managed-office)) beats a conventional Class A lease — and vice versa. --- Citation: Source: Class A Atlas (https://classa.info/cities/boston/seaport), updated 2026-04-15T00:00:00.000Z.