William Klotz
Home addition contractor working in Philadelphia.
- License 33832, inactive in the city's records on Sep 24, 2026
8 jobs on Philadelphia permits, 2022 to 2026: 5 home additions, 2 heat pump installations, 1 roofing job.
The state showed this license as "inactive" on Sep 24, 2026. Do not hire until that is cleared.
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? | License 33832, inactive in the city's records on Sep 24, 2026Contractor | Problem |
| Jobs on record | 8 jobs on Philadelphia permits, 2022 to 2026: 5 home additions, 2 heat pump installations, 1 roofing jobTheir permits mention 2 decks, 1 garage.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
- 191452 jobs
- 191391 job
- 191541 job
- 191471 job
- 191431 job
Jobs by kind of work
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 3, 2026 | Heat pumpEZ PERMIT DUCTWORK & WARM-AIR APPLIANCES - For the installation of New Ductwork,… | 19139 | not stated |
| Nov 28, 2025 | AdditionFor the erection of an addition at the second floor level and for interior and exterior alterations… | 19154 | not stated |
| Aug 12, 2025 | AdditionFor the removal of a portion of the existing structure and the legalization of a second floor… | 19147 | not stated |
| Jul 8, 2025 | Reroof**make safe permit** for repair (treat and new grout) of fire damaged joist, roof repair,… | 19143 | not stated |
| Jul 15, 2024 | Heat pumpEZ PERMIT DUCTWORK & WARM-AIR APPLIANCES - For the installation of New Ductwork,… | 19145 | not stated |
| Dec 6, 2023 | AdditionFor an addition on existing slab at the rear of an existing semi-detached structure | 19137 | not stated |
| Dec 5, 2022 | AdditionRear deck addition to an existing structure, details as shown in the plan | 19114 | not stated |
| Apr 6, 2022 | AdditionFor the construction of an addition with a roof deck accessed from the second level above an… | 19145 | not stated |
What to ask before you hire
About William Klotz
- Do not hire until the state shows the license as active.
- 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 Klotz
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