Siding contractors in Portland, ME
Portland's costs run above the Maine state average. The contractor pool is small relative to demand, materials travel farther, and the peninsula's tight lots and historic overlays complicate everything from staging to exterior approvals.
Our Haus isn't a contractor directory. We give you the local cost math, the permit reality, and the paperwork tools — the scope, the proposal comparison, and the vault your records live in.
Siding replacement cost in Portland
Based on a 1,800 sq ft siding replacement scope, adjusted by the Maine regional cost index and a Portland metro multiplier of 1.06×. A 10% contingency reserve is included. These are budgeting estimates, not quotes.
| Portland siding replacement | Low | Likely | High |
|---|---|---|---|
| Basic finishEntry-level materials, no layout change | $45k | $80k | $125k |
| Mid-range finishThe most common scope | $80k | $134k | $214k |
| High-end finishCustom materials and detail | $214k | $321k | $491k |
Source: Our Haus cost engine — per-square-foot bands from public industry data (Cost vs. Value, NAHB, RSMeans-derived regional indices), adjusted for Maine and the Portland metro.
Estimated range — based on BLS OEWS national average wages and BLS PPI material indexes applied to Our Haus baseline unit costs, as of June 2026. Estimates are shown as a range and help set expectations. They are not a quote, a verified price, or an appraisal of what a contractor will charge.
Where the money goes (mid-range finish)
| Line item | Low | Likely | High |
|---|---|---|---|
| Decking / paving materials | $23k | $39k | $62k |
| Structural framing | $13k | $22k | $35k |
| Railings & stairs | $7.3k | $12k | $19k |
| Footings | $7.3k | $12k | $19k |
| Labor | $19k | $32k | $51k |
| Permits | $2.9k | $4.9k | $7.8k |
Estimated range — based on BLS OEWS national average wages and BLS PPI material indexes applied to Our Haus baseline unit costs, as of June 2026. Estimates are shown as a range and help set expectations. They are not a quote, a verified price, or an appraisal of what a contractor will charge.
What drives the price in Portland
Federal and Greek Revival houses on the peninsula, late-1800s multi-families in Munjoy Hill and the West End, and mid-century single-families in Deering and North Deering. Coastal exposure means exterior envelope work — flashing, drainage, and siding detail — carries more weight than it does inland.
- What is underneath
- Strip-off jobs reveal sheathing condition. On pre-1960 homes, plan a repair allowance; a bid with no unit price for sheathing replacement is pricing luck.
- Product class
- Vinyl, fiber cement, engineered wood, and cedar each carry different installed costs and maintenance profiles. Fiber cement's installed price includes the cutting and handling labor that makes it slower to hang.
- Window and trim integration
- New siding against old windows is where leaks come from. Whether the bid includes new flashing tapes and integrated trim, or just butts siding to existing trim, is a major quality and price divider.
- Stories and access
- Three-story work needs staging or a lift, and tight lot lines slow everything. Access is a real cost line on dense New England lots.
Common Portland neighborhoods where this work comes up: Munjoy Hill, West End, East End, Deering Center, Rosemont.
Permits and rules in Portland
Authority: City of Portland Permitting and Inspections Department
Additions require a building permit and zoning review, and much of the peninsula falls inside historic districts where exterior changes and additions go through Historic Preservation Board review first. Shoreland-zoning rules apply near the water and can restrict footprint expansion outright — confirm this before designing an addition.
Maine contract and licensing rules
Maine requires a written contract for home-construction or repair work over $3,000. The contract must include the contractor's name and address, the work and materials, the total price, a payment schedule, start and completion dates, a warranty statement, and a notice about the state's contractor-dispute mediation program. Maine does not license general contractors, so verify insurance directly.
Timeline and season in Portland
The building season is short. Foundations and additions want to be in the ground by October, and framing exposed to a Maine winter needs a plan for weather protection. Expect a genuine queue for spring and summer starts — booking a year ahead is normal for additions.
Typical duration: 1–3 weeks on site for a typical single-family.
- 1Measurement and quote · 1 week
Wall area, openings, and a teardown assessment of the existing cladding layers.
- 2Material order · 1–6 weeks
Fiber cement and special-order colors carry lead times; confirm before teardown.
- 3Strip and repair · 2–5 days
Old siding off, sheathing inspected, repairs at the stated unit price.
- 4Weather barrier and flashing · 1–3 days
The phase that decides whether the job lasts. Housewrap, tapes, pan flashing at openings.
- 5Siding and trim · 1–3 weeks
Product installation with proper clearances at roofs, decks, and grade.
What's included — and what usually isn't
Siding is a weather-barrier job wearing a cosmetic costume. The product line on the bid matters less than the flashing, housewrap, and window-integration details underneath — and those are exactly the lines that disappear from the cheapest quote.
Typically included
- • Removal and disposal of existing siding where specified
- • Inspection of sheathing and repair at a stated unit price
- • Housewrap or integrated weather barrier, taped and detailed
- • Flashing at windows, doors, roofs, and penetrations
- • New siding in the specified product, with trim and corners
- • Site protection and daily cleanup
Usually excluded
- • Rotted sheathing or framing repair beyond a stated allowance
- • Window replacement, even where the work exposes window problems
- • Painting, when the product is unfinished
- • Gutter removal and reinstallation, unless listed
What a complete Portland estimate spells out
- • Whether existing siding is stripped or covered — and if covered, why that is acceptable
- • Weather-barrier product by name and how openings are flashed
- • A per-sheet or per-square-foot unit price for sheathing repair
- • Siding manufacturer, product line, and warranty type
- • How the work integrates with existing windows and trim
Full checklist: what should be in a contractor's estimate.
Looking for a siding replacement contractor in Portland?
We don't keep a contractor directory, and we won't pretend to. The dependable process is to gather two or three referrals locally, check the Maine registration or license rules above, confirm general liability and workers' compensation directly with each carrier, then compare the written proposals side by side against the ranges on this page.
Run a Portland contractor's business? You can publish a free Our Haus profile with your license, insurance dates, service area, and work photos, and share it by link or QR code.
Have a Portland quote in hand?
Run it through the quote range checker. We compare it against the Maine cost index, flag line items that look high, and review the contract against Maine home-improvement rules.
Check my quoteSiding replacement in Portland — common questions
Can new siding go over the old siding?
Sometimes — over one sound layer of flat siding, with the right preparation, it is legal and can be reasonable. Over multiple layers, over rot, or where window flanges need re-flashing, strip it. Any honest answer requires looking at what is on the house now.
How long does new siding last in this climate?
Quality vinyl and fiber cement are routinely rated for decades, and both handle freeze-thaw well when the weather barrier underneath is detailed correctly. Cedar performs beautifully but wants a maintenance cycle. The failure mode in New England is almost never the product — it is the flashing.