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Greenport Construction

Building in Corte Madera

Flatland lots with drainage and flood considerations that belong in the permit set early.

Greenport is a design-build general contractor and millwork shop in San Rafael, founded in 2012 by brothers Eli and Jacob Froneberger, both raised in Marin. We hold California General Building license #1073941, and we mill our own casework at 47 Louise St, a short drive from Corte Madera.

Book an on-site consultation in Corte Madera

Permitting

The Town of Corte Madera Planning and Building Departments review applications, and low-lying parcels also carry flood-zone requirements that affect finished floor elevations.

Housing stock

Post-war single-family houses on flat lots, plus hillside houses in Christmas Tree Hill and Chapman Park with much tighter access.

What decides the schedule

Drainage and flood elevation. On the flat, where water goes decides foundation and finished floor detail, and it is cheaper to solve on paper.

Common project types

  • Ranch-house renovation and additions
  • ADUs and garage conversions
  • Kitchens, baths, and built-ins
  • Foundation and drainage work
Region
Marin County
Shop
47 Louise St, San Rafael, CA 94901
License
#1073941, active through 3/31/2027
Hours
Monday to Sunday, 8am to 6pm
Reviews
5.0 from 17 Google reviews

Corte Madera questions

Who issues building permits in Corte Madera?
The Town of Corte Madera Planning and Building Departments review applications, and low-lying parcels also carry flood-zone requirements that affect finished floor elevations.
What kind of work does Greenport do in Corte Madera?
Ranch-house renovation and additions; ADUs and garage conversions; Kitchens, baths, and built-ins; Foundation and drainage work. We are a design-build general contractor and millwork shop, so drawings, permits, construction, and cabinetry come from one firm.
Is my Corte Madera lot in a flood zone?
Parts of town are. Flood-zone status changes foundation and finished floor requirements, so we check the mapped designation during feasibility and design to it from the start.

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