Sentry Building Systems

Construction company in York, ME 03909

About this company

Sentry Building Systems is listed as a construction company based in York, Maine, in York County. Federal motor carrier records list 6 drivers and 6 trucks for the company. It is one of 25 general contractors in ZIP 03909.

Other construction companies nearby

Atlantic Construction433 US Route One, Ste 101, York

(207) 363-3950

CB Builders INC439 York St, York

(207) 363-3185

CRACK-X of Southern Maine647 US Route 1, York

(207) 618-9380

Graystone Builders of Maine Inc.764 US Route 1, York

(207) 363-6085

Maine Coast Builders23A Witchtrot Rd, York

(207) 752-0809

Fleet size

Drivers6

Trucks6

Last federal filing: Oct 2024. Source: FMCSA.

Strong market, crowded fieldArea profitability for construction in ZIP 03909

Housing demand69

Sales pace, new listings and new construction. Source: Zillow

Customer spending power90

Household income and home values

Room for another contractor7

More crowded than 93% of US ZIPs

Scored against every US ZIP. An index of local conditions, not this company's results.

County context

One of 281 general contractors in York County, ME.

50 excavation and demolition companies in York County, ME.

All 580 construction companies in York County, ME.

ZIP 03909 at a glance

Population: 10,943 (120 per sq mi)
Median age: 50
Households: Median income $115,608 · 54% earn six figures
Housing: 83% owner-occupied
Workforce: 54% labor-force participation · 2.0% unemployment

ZIP figures are US Census estimates for the ZIP area, not the company.

Housing market around ZIP 03909

Figures describe the local area, not this company.

Typical home value$757,000+1.9% past year · +95% in 10 years

Typical rent$2,435

12-month value outlook+1.9%

New homes permitted, 20251,473York County

Days to sale agreement15Portland metro · 14 a year ago

Listings with a price cut27.2%Portland metro

Sale price vs list100.0%Portland metro

New construction sales57Portland metro, Aug · −26% from last year

Source: Zillow (home values, rent, outlook and metro sales), data through Sep 2026. Permits: U.S. Census Bureau.

Typical home value, last 10 years

Source: Zillow Home Value Index, Sep 2026.

Local building angle: York County permitted 1,473 new homes in 2025, including 504 apartment units. 15% of the homes in this ZIP were built since 2000.

Local figures are estimates from public records and Zillow housing data, updated regularly.