Composite and wood decks with railings, laid out to the doors and the grade, framed to code. This page covers Highland, plus Glenwood and Lisbon: 9 ZIP codes in Howard County.
The layout is matched to the doors and the yard. Material is chosen at the estimate.
Sized to the house and laid out for how you actually use the yard.
Boards that hold color and skip the yearly stain.
Pressure-treated wood when the house wants real boards.
Stairs, rails, and code-right infill that finish the elevation.
Boards that flex, crack, or stay dark and damp.
Posts and rails that move when you lean on them.
Nails backing out and fasteners bleeding rust.
Gaps where the deck meets the house, or stairs that shift.
ExteriorMax installs roofing, siding, windows, gutters, doors, and decks in Highland, Maryland under MD 142964. Maryland, Virginia, West Virginia, and Pennsylvania are authorized service areas. The business address is 6301 Ivy Ln, Suite 120, Greenbelt, MD 20770.
The ZIP codes below are the zone list that names Highland, along with Glenwood and Lisbon. They are not a city-limit map of Highland alone.
Photos on this page are examples of ExteriorMax work and the products we install. They are not a job at a specific address.
Glenwood, Lisbon, Highland. Howard County. Zone MD-HOWARD-WEST. ZIP codes: 20759, 20777, 21029, 21036, 21723, 21737, 21738, 21765, 21794.
From 2025-11-11 through 2026-11-11, National Weather Service severe reports for Howard County include this headline: 1 tornado reported in Howard County. That is a county record. It does not mean every home in these ZIP codes experienced that weather. A county tornado report is not a deck inspection. Footings, ledger, and rails are checked on the house.
$0 down financing for qualified homeowners. Plans are walked at the inspection. A small deposit holds the schedule. Financing details.
Yes. This page covers Highland, plus Glenwood and Lisbon: 9 ZIP codes in Howard County under MD 142964.
Signature decks, Composite, Wood, Railings. The layout is matched to the doors and the yard. Material is chosen at the estimate.
Laid out with you, Footings and ledger, Boards and fasteners, Rails, stairs, and walkthrough.
Permit rules differ by county. ExteriorMax handles the permit and HOA packet for the job. We do not publish a separate permit fee for Highland.
$0 down financing for qualified homeowners. Plans are walked at the inspection. A small deposit holds the schedule.
Also in Highland: Roofing in Highland · Siding in Highland · Windows in Highland · Gutters in Highland · Doors in Highland.
Company-wide decks page · Composite and wood decks · Highland overview
Glenwood decks · Lisbon decks · Columbia decks · Elkridge decks · Ellicott City decks · Hanover decks · Jessup decks
Highland, plus Glenwood and Lisbon. ExteriorMax installs roofing, siding, windows, gutters, doors, and decks in Highland, Maryland under MD 142964. Maryland, Virginia, West Virginia, and Pennsylvania are authorized service areas. The business address is 6301 Ivy Ln, Suite 120, Greenbelt, MD 20770.