William Guyon
Home addition contractor working in Philadelphia.
- Philadelphia publishes no contractor license list we can check
8 jobs on Philadelphia permits, 2022 to 2026: 7 home additions, 1 remodel.
What the public records show
From the city's license records and the city's permits, one question at a time.
| Question | Records show | Mark |
|---|---|---|
| Licensed? | Philadelphia publishes no contractor license list we can checkThat says nothing about this business either way. | Ask them |
| Jobs on record | 8 jobs on Philadelphia permits, 2022 to 2026: 7 home additions, 1 remodelTheir permits mention 6 decks, 1 basement.Our Philadelphia permit records cover September 2021 to September 2026. |
Records: the city Department of Licenses and Inspections and City of Philadelphia permits.
Cost and timing
Permit timeline
Across Philadelphia, a addition permit stays open about about 12 months, from permit to final inspection
This is not how long the crew works at your home: most of it is waiting for the inspection. Ask them how many days the work takes. How long addition jobs take.
Track record
Jobs per quarter
Where they work most
- 191482 jobs
- 191462 jobs
- 191451 job
- 191471 job
- 191251 job
Jobs by kind of work
- Addition
- Remodel
Latest jobs
Permit values are what the contractor wrote on the permit form, not what the owner paid.
| Date | Work | ZIP | On the permit form |
|---|---|---|---|
| Jul 22, 2026 | AdditionFor the interior alteration and renovation with a 3rd and 4th story addition over the existing… | 19148 | not stated |
| Jul 17, 2026 | AdditionInterior renovations and for the erection of an addition at the rear of an existing attached… | 19145 | not stated |
| Nov 20, 2025 | AdditionFor the erection of a third floor addition with a roof deck and pilot house and alterations… | 19146 | not stated |
| Apr 28, 2025 | AdditionFor the partial demolition and erection of an addition to an existing attached structure, to… | 19147 | not stated |
| Sep 20, 2023 | AdditionFor the erection of a third floor addition that includes a roof deck and pilot house above | 19148 | not stated |
| Nov 14, 2022 | RemodelFor interior alteration of existing structure the work involves partial rebuilding of 2nd floor… | 19146 | not stated |
| May 25, 2022 | AdditionFor the erection of an addition and interior alterations as | 19125 | not stated |
| May 17, 2022 | Addition*** amendment approved on 11/29/2022: to amendment previously approved building permit #… | 19121 | not stated |
What to ask before you hire
About William Guyon
- Ask for their license number and check it with the state.
- Ask what the warranty covers and for how long, in writing.
- Search their name on the Better Business Bureau site, and read their reviews.
Worth asking any home addition contractor
- Can you show me proof of liability insurance and your bond?
- Do you handle the plans and engineering, or do I hire them?
- Who will run the job day to day, and who are the subcontractors?
- Who pulls the permits, and what is the payment schedule?
Get a quote from William Guyon
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Your job room keeps the request, your photos and every reply in one place, with an assistant that checks prices against city permits. Keep its link: it is the key to your job.
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