--- title: "Sioholm Excavation" description: "Sioholm Excavation describes itself as a locally owned septic system installation and repair company in Wallingford CT that serves the State of Connecticut" doc_version: "2026-10-19" last_updated: "2026-10-19" --- # Sioholm Excavation **Trade:** Demolition & Excavation · **Address:** 42 New Pl St, Wallingford, CT 06492 · **Phone:** (203) 239-3838 · **Website:** http://www.sioholmexcavation.net/ · **Languages:** English **Rating: 1.9/5** (low confidence) — from 4 reviews across 6 sources. ## The honest read Sioholm Excavation describes itself as a locally owned septic system installation and repair company in Wallingford CT that serves the State of Connecticut, and it says it has been in business 30 years. On Google it holds 4 stars from 8 ratings, and its Better Business Bureau grade is A+. A 2022 customer who was buying a property said Bill stayed on the phone for 45 minutes explaining the excavation and replacement process for a septic system. A 2025 customer said they waited 3 months, that equipment and materials sat in the yard for 3 weeks, and that the job then took 4 days. The 2025 customer also wrote that the equipment ruined the lawn front and back and that the site was not cleaned up. A 2024 reviewer wrote that one of the company's trucks and excavators was blocking their road and that the operator yelled "patience" at them. Connecticut lists its home improvement contractor registration, HIC.0550872, as active, held by William N Sioholm Jr. **Strengths:** - Long phone explanation — a 2022 customer said Bill spent 45 minutes explaining the process **Concerns:** - Long wait — a 2025 customer said the job was put off 3 months - Lawn damage — a 2025 customer said equipment ruined the lawn front and back - Operator conduct — a 2024 reviewer said the operator yelled "patience" on a blocked road ## Claims & citations Every claim below is backed by real evidence rows — uncited claims are dropped in code before publication. - Describes itself as a locally owned septic system installation and repair company in Wallingford CT serving the State of Connecticut _(confidence: high)_ - [Official Website](http://www.sioholmexcavation.net) — “About (self-reported, verbatim): Look no further. You have come to the right place. Sioholm Excavation is a locally owned and operated septi…” - Says it has been in business 30 years _(confidence: medium)_ - [Official Website](http://www.sioholmexcavation.net) — “Self-reported 30 years in business” - Better Business Bureau grade of A+ _(confidence: high)_ - [Better Business Bureau](https://www.bbb.org/us/ct/wallingford/profile/excavating-contractors/william-n-sioholm-jr-excavation-company-0111-77000765) — “Better Business Bureau grade: A+” - 4 stars from 8 Google ratings _(confidence: high)_ - [Google](https://www.google.com/maps/search/?api=1&query=Sioholm%20Excavation&query_place_id=ChIJQ5Qa8kvJ54kRO0nsPTyjWRI) — “Google: 4★ from 8 ratings” - A 2022 customer said Bill spent 45 minutes on the phone explaining the excavation and replacement process for a septic system _(confidence: medium)_ - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VJQ0FnSURldXQyWUJREAE!2m1!1s0x0:0x1259a33c3dec493b!3m1!1s2@1:CIHM0ogKEICAgIDeut2YBQ%7C%7C?hl=en-US) — “5★ I needed advice on a septic system replacement for a property I was buying, Bill stayed on the phone explaining the excavation and replac…” - A 2025 customer said they waited 3 months, equipment and materials sat in the yard for 3 weeks, and the job took 4 days _(confidence: medium)_ - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChdDSUhNMG9nS0VJQ0FnSUN6aFpla293RRAB!2m1!1s0x0:0x1259a33c3dec493b!3m1!1s2@1:CIHM0ogKEICAgICzhZekowE%7C%7C?hl=en-US) — “1★ You made us wait 3 months putting us off!! Then you dropped off equipment in yard and materials left for 3 weeks then took him 4 days to …” - A 2025 customer said the equipment ruined the lawn front and back and the site was not cleaned up _(confidence: medium)_ - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChdDSUhNMG9nS0VJQ0FnSUN6aFpla293RRAB!2m1!1s0x0:0x1259a33c3dec493b!3m1!1s2@1:CIHM0ogKEICAgICzhZekowE%7C%7C?hl=en-US) — “1★ You made us wait 3 months putting us off!! Then you dropped off equipment in yard and materials left for 3 weeks then took him 4 days to …” - A 2024 reviewer said a company truck and excavator blocked their road and the operator yelled "patience" _(confidence: medium)_ - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VJQ0FnSUQ3MU03VWZnEAE!2m1!1s0x0:0x1259a33c3dec493b!3m1!1s2@1:CIHM0ogKEICAgID71M7Ufg%7C%7C?hl=en-US) — “1★ One of their trucks and excavators was blocking the road that I live on. I pulled up and waited, I was ignored. I beeped the horn and the…” - Connecticut lists its home improvement contractor registration, HIC.0550872, as active, held by William N Sioholm Jr. _(confidence: high)_ - [State License Registry](https://www.elicense.ct.gov/Lookup/LicenseLookup.aspx) — “CT hic license HIC.0550872 registry-verified active — registry holder of record: WILLIAM N SIOHOLM JR” - Specializes in Demolition & Excavation _(confidence: high)_ - [Official Website](http://www.sioholmexcavation.net) — “About (self-reported, verbatim): Look no further. You have come to the right place. Sioholm Excavation is a locally owned and operated septi…” - [Google Reviews](https://www.google.com/maps/reviews/data=!4m8!14m7!1m6!2m5!1sChZDSUhNMG9nS0VJQ0FnSURldXQyWUJREAE!2m1!1s0x0:0x1259a33c3dec493b!3m1!1s2@1:CIHM0ogKEICAgIDeut2YBQ%7C%7C?hl=en-US) — “5★ I needed advice on a septic system replacement for a property I was buying, Bill stayed on the phone explaining the excavation and replac…” ## License Status: **active** (#HIC.0550872, hic) — verified against the official CT state registry on 2026-10-19, never self-reported. Re-check at the official registry: https://www.elicense.ct.gov/Lookup/LicenseLookup.aspx ## Sources - [Google](https://www.google.com/maps/search/?api=1&query=Sioholm%20Excavation&query_place_id=ChIJQ5Qa8kvJ54kRO0nsPTyjWRI): 4.0★ from 8 ratings - [Official Website](http://www.sioholmexcavation.net): 30 yrs in business · Self-reported profile and service details - [Better Business Bureau](https://www.bbb.org/us/ct/wallingford/profile/excavating-contractors/william-n-sioholm-jr-excavation-company-0111-77000765): Listed on this source - [Google Reviews](https://www.google.com/maps/search/?api=1&query=Sioholm%20Excavation&query_place_id=ChIJQ5Qa8kvJ54kRO0nsPTyjWRI): Listed on this source - [Procore Construction Network](https://network.procore.com/p/sioholm-excavation-llc-wallingford): Listed on this source - [Local News](https://excavationcontractors.com/connecticut/wallingford/sioholm-excavation/): Listed on this source ## Recent reviews - **1/5 · Google Reviews · Felicia A · 2025-10-10**: You made us wait 3 months putting us off!! Then you dropped off equipment in yard and materials left for 3 weeks then took him 4 days to finally do the job which would have taken a professional one day!! Ruined our lawn with his equipment front yard and back cost us thousands we don't have to repair… - **1/5 · Google Reviews · Jennifer Tzetzo · 2024-08-21**: One of their trucks and excavators was blocking the road that I live on. I pulled up and waited, I was ignored. I beeped the horn and the operator yelled “patience” and gave us a dirty look. If this is who works for Sioholm, I wouldn’t ever hire them. - **5/5 · Google Reviews · Lori DeSanti, Realtor · 2022-10-08**: I needed advice on a septic system replacement for a property I was buying, Bill stayed on the phone explaining the excavation and replacement process for 45 minutes. We had never spoken before, but he cared enough to spend the time to explain everything. I highly suggest him, his customer service i… - **Better Business Bureau · Christopher C**: Nightmare French drain contractor. Absolutely regret using Siholm Excavation. --- Data freshness: last scanned 2026-10-13T11:24:52.289Z. Cite as: Sioholm Excavation — Tavlee (https://tavlee.com/contractor/sioholm-excavation-wallingford) Source: https://tavlee.com/contractor/sioholm-excavation-wallingford ## Sitemap [Full site index](https://tavlee.com/sitemap.md)