What Does It Cost to Build a Deck in MidCoast Maine?
Most homeowners spend $9,000 to $28,000 on a 300 square foot deck, and the decking material moves that number further than any other single choice. Updated for 2026.
That range is wide because a deck is really two projects. There is a structure in the ground and a surface you walk on, and they price separately.
Ken has been building decks here since 1988. He prices what is actually on your lot, and the visit costs nothing.
Cost to build a deck in MidCoast Maine, by material
| Decking material | What the range covers | Estimated range* |
|---|---|---|
| Pressure-treated wood | ~300 sq ft, standard railing, footings to frost depth | $9,000 to $15,000 |
| Eastern cedar | ~300 sq ft, standard railing, footings to frost depth | $13,000 to $19,000 |
| Composite | ~300 sq ft, standard railing, footings to frost depth | $17,000 to $28,000 |
*Estimates for a low deck on a workable site, not quotes. Height, stairs, ledge and access all push a job outside these numbers in either direction.
What Actually Changes the Cost of a Deck?
1. Decking material. Composite runs roughly double pressure-treated and asks almost nothing of you afterward. Trex and TimberTech both publish their full board lineups, and the mid-tier lines are where most of our clients land.
2. Footings. Posts have to bear below frost, which is four feet through most of this region. Hand-digging on a site a machine cannot reach can add a day or two of labor by itself.
3. Height off the ground. A deck two steps up is cheap to frame. A deck at second-floor height needs taller posts, bracing, a full stair run and code railing all the way down.
4. Stairs. Every run adds framing, treads, railing and a landing. Two runs off a corner deck cost real money that a drawing makes look free.
5. Railing style. Standard baluster railing sits inside the ranges above. Cable, glass and custom metal do not.
6. Ledge and slope. MidCoast lots hit rock shallow. Finding ledge under a footing hole means either a redesign of the post layout or drilling and pinning, and that is a change in scope worth knowing about before it happens.
7. Access. Material carried by hand from a road-side driveway to a back yard is slower than material staged ten feet from the frame.
Wood, Cedar, and Composite Deck Costs
Pressure-treated is the budget choice and it lasts if it is washed and sealed on a cycle. Skip that and it grays, cups and checks within a few seasons.
Cedar sits in the middle and looks better than either alternative on an older Maine house. It also wants the same maintenance discipline as pressure-treated.
Composite costs the most on day one and roughly nothing after. In a climate that freezes and thaws forty times a winter, that trade favors composite for most people who plan to stay.
How Do Footings Affect the Cost of a Deck?
A deck fails from the ground up. Posts set above frost depth heave, the frame racks, and the boards you paid the most for end up out of plane.
We dig to frost depth on every deck and we do not price a shallower option. Home builder guidance treats deck framing as structure, not as landscaping, and so do we.
Deck Costs on Waterfront and Shoreland Lots
A deck inside the shoreland zone is a different permitting conversation from a deck behind an inland farmhouse. Setbacks, lot coverage and nonconforming structures all come into it.
Read the state's shoreland zoning overview if your lot touches water. Then let your code enforcement officer confirm it, because the standards are locally administered and the officer decides.
A MidCoast Maine Deck Cost Example
A 16x20 composite deck at grade, standard railing, one step down to the lawn, lands near $18,000 to $23,000 in this market.
Add a full stair run to a walk-out and you are adding $1,800 to $3,500. Build the same footprint in pressure-treated and it drops to roughly $10,000 to $13,000.
Where Can You Save on a Deck Build?
- Drop to pressure-treated and cut material cost close to half, accepting the upkeep
- Simplify the railing before you shrink the deck, since railing is priced per foot and the floor is not
- Build low where the grade allows, which removes stairs and taller railing at once
- Phase it, framing the full footprint now and finishing a section later
What we will not shorten is footing depth, framing lumber grade or fastener quality. Those are the three things that fail first, and Maine weather finds them fast.
How Long Does a Deck Build Take?
Footings want unfrozen ground, so the season runs spring through late fall. Most decks take one to two weeks on site once we start.
Book the estimate in late winter for a spring build. Calls that come in June are usually looking at a late-summer start, purely because of the queue.
What do homeowners ask about deck costs?
Do deck footings really need to go to frost depth? Deck footings really do need to go to frost depth. Deck posts follow the same frost rule as a foundation, and this is where most heaved decks came from.
Is composite worth double the price? Composite is usually worth double the price if you are staying in the house. If you are selling in two years, pressure-treated does the job.
Can you rebuild on my old footings? We can sometimes rebuild on your old footings. We dig one and look before anybody promises it, because reusing a bad footing costs more than replacing it.
How much deck can I get for $15,000? You get roughly 300 square feet of deck for $15,000 in pressure-treated with stairs, or about 220 square feet in composite at grade.
Do I need a permit? You usually do need a permit, and the threshold is set by your town rather than by the state. We pull it as part of the job.
How Do You Get a Deck Price You Can Plan Around?
Two decks with identical square footage price differently once slope, ledge, access and stair count are real instead of assumed.
Ken measures the site and puts the number in writing at no charge. Call 207-386-9235, or read the full deck building page first.
Pricing another project? We have guides for the cost of a garage and the cost of new siding as well.