99.6review score /100
Portland, OR / Exterior & structure
Licensed Gutter installation companies in Portland
Ranked after matching the required license records.
The short answer
Highest scoreMoss Busters · 99.6/100
Most Google ratingsAA Window, Roof & Gutter Cleaning · 960
Record snapshotNovember 9, 2026 · 25 compared
- 1 Match dated source records.
- 2 Apply the published formula.
- 3 Show the sources and gaps.
What we check: Google listing 25/25 · Oregon CCB 25/25
| Source | What it shows | Coverage | Source dates |
|---|---|---|---|
| Google listing | Listed contact details, rating, count and review date | 25 / 25 | 2026-11-09 |
| Oregon CCB | Dated license, endorsement, bond and insurance fields | 25 / 25 | 2026-11-08 |
Not checked: workmanship, price fairness or first-hand testing.
Not checked: workmanship, price fairness or first-hand testing.
The 25 ranked records
License records matchedEvery score uses the same published formula: Google rating, rating volume and newest review date. It is not a test of workmanship or safety. Active Oregon CCB record checked. Exact specialty work and individual credentials must still be confirmed. Scoring formula.
The listing categories can include gutter cleaning and roofing businesses. Confirm that the company offers new gutter installation.
98.1review score /100
96.4review score /100
95.2review score /100
94.5review score /100
92.4review score /100
89.1review score /100
88.1review score /100
85.1review score /100
84.5review score /100
81.5review score /100
81.0review score /100
80.7review score /100
78.9review score /100
78.7review score /100
77.3review score /100
72.0review score /100
71.9review score /100
71.1review score /100
68.5review score /100
67.7review score /100
67.5review score /100
44.4review score /100
43.8review score /100
42.3review score /100
Compare the full ranking
Download CSV ↓Method reviews-1.0
How the score is calculated.
Each business receives the same calculation. The rating, volume and recency components follow our electrician formula, then normalize their 70 available points to 100. License history and bond/insurance points are not used here. The original Oregon electrician comparison uses additional eligibility and license components, so its score is not directly comparable to this review-data score.
Rating · 35 points: with n ratings and average r, adjusted rating a = (n × r + 10 × 4.0) ÷ (n + 10). Points = 35 × clamp((a − 3.5) ÷ 1.5, 0, 1). With zero ratings, award zero.
Volume · 25 points: 25 × min(1, log10(1 + n) ÷ log10(501)).
Recency · 10 points: newest review within 30 days: 10; 90 days: 8; 180 days: 5; 365 days: 2; older or no ratings: 0.
Final score: 100 × (rating + volume + recency points) ÷ 70. Display one decimal; sort by the unrounded value. Ties use more Google ratings, then the lower numeric Google listing ID.
A missing review-date retrieval excludes a rated listing until resolved; it does not become a zero. No ratings earns zero. Credential matching is separate context and does not affect this score. No score or rank is changed by hand. This is a public-review-data comparison, not a workmanship or safety assessment.
Before you hire
Compare the same scope.
Give each business the same project description, photos and address. Ask for written answers.
- 01
Which sizes, materials and hanger spacing are specified?
- 02
Where will each downspout discharge?
- 03
Are removal, fascia repairs and any gutter guards included?
How to check Oregon gutter installation companies records
Active Oregon CCB record checked. Exact specialty work and individual credentials must still be confirmed.
Project costs in Portland
This dataset does not contain sourced local service prices. We do not publish an estimated local price range from ratings or license records. Ask each business for a written price for the same scope, including labor, materials, permits, travel, exclusions and change orders. Compare the total and the included work.
Frequently asked questions
How were these Portland gutter installation companies ranked?
The 25 records use the published rating, review-volume and review-recency formula. The page states the credential checks completed for this trade. A review-data score is not a service-quality test.
Does a place on this list confirm current availability or coverage?
No. These are dated public records. Confirm service to your street address, the exact work, current license status and availability directly with the business.
Can a company pay for a higher rank?
No. Nobody pays to change a score or numbered position. Any separate promotional feature is disclosed and excluded from the scored comparison.
Update log
: source snapshot used for this comparison. The linked profiles and downloads identify the collection dates for individual facts.
: this page was built from that snapshot. Content changes do not establish a new data collection.
Review before the next publication is planned monthly; no automatic refresh date is claimed.
Selection, sources and limits
We collected 100 Google Maps results for “gutter installation contractor” using the Portland search location on November 9, 2026. We kept matching service categories with an explicit Portland, OR listing address, no closed marker and complete rating/date inputs. Shared identities are deduplicated. The source directory contained 51 entries; 26 were held out and 0 promotional features were separated. 25 additional records did not pass the required credential match. This search sample is not a complete market census.
Each profile links to the original listing and any matched official record. Review text and reviewer details are not collected. Newest review dates and individual fact dates are shown in profiles. The required license records passed the published matching gate. Complaint histories and specialist qualifications beyond that gate have not been checked. A missing match does not establish a problem with a business.
Crewsive LLC publishes this comparison. Scores and positions cannot be bought. Promotional features are separate and excluded from the numbered ranking. Known client relationships are disclosed. Funding disclosure · Source data · Corrections.
Use this reference
Cite this page
Crewsive LLC. “Best Licensed Gutter installation companies in Portland, OR (2026): 25 Reviewed.” Portland Oregon Reviews. Content updated 2026-11-10. https://portlandoregonreviews.com/gutter-installation
For ranking data, also state the data snapshot date (2026-11-09) and method version. A citation is a reference, not an endorsement.