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COMPANY RECORD · PHILADELPHIA, PA

William Klotz — permit history in Philadelphia, PA

William Klotz appears on 159 Philadelphia permit records from 2021 through 2026, most often residential building (50.3% of the record).

Permit categories

CategoryPermitsShare
Residential Building8050.3%
Mechanical3119.5%
Building2515.7%
Zoning2213.8%
Site / Utility Permit10.63%

5 categories, as classified by the issuing authority. Small categories stay visible rather than being rounded away.

Activity by year

YearPermits issued
20218
202215
202325
202433
202531
202647

Busiest year on record: 2026, with 47 permits. One project can account for several filings, so read this as filing activity rather than workload.

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This page is a snapshot of William Klotz. The search behind it holds more than 242,223 Philadelphia permits naming a contractor, since 2021: 82,008 plumbing permits, 51,127 electrical permits, 25,710 mechanical permits, 25,367 residential building permits, 24,512 zoning permits.

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Names on the same project timelines

Name in sourceLinked permitsLast seen
Just Plumbing & Heating Inc182026-10-05
Omar Rivera132026-10-05
D'narpo Electrical112026-09-30
Matthew Spanish42026-05-22
Stronghold Development & Construction LLC42022-01-13
A & G Heating And Cooling LLC32022-01-13
Tobias Sellen32026-02-04
Alb Construction Inc32022-02-01
Collin Estep22023-06-15
David R Smith22025-04-23
Anthony Ridolfi22023-05-11
John J De Stefano22026-07-01

44 named participants share a resolved project timeline with William Klotz. A shared timeline is a research lead, not proof of a partnership or a current contract. Names appear as the authority published them.

Where they worked

Address in sourceMost recent permit
2839 S 10TH ST2026-10-23
8031 MANSFIELD AVE2026-10-18
3814 MANAYUNK AVE2026-10-06
26 OREGON AVE2026-09-28
1513 S 2ND ST2026-09-02
337 N FRONT ST2026-09-01
3241 S SYDENHAM ST2026-08-24
1234 N 29TH ST2026-08-19
1008 GREENWICH ST2026-07-10
5008 PARRISH ST2026-07-03
636 KIMBALL ST2026-06-12
21 WOLF ST2026-06-09
7036 SHERWOOD RD2026-06-08
1414 S PENN SQ2026-05-21

108 distinct addresses on record; the 14 most recent are shown. Addresses appear as the authority published them. A permit is a filing at an address, not a completed job there.

Also named on permits at the same addresses

CompanyShared addressesYears
Just Plumbing & Heating Inc222021–2026
Omar Rivera132021–2026
D'narpo Electrical112024–2026
John Christinzio62021–2026
Alb Construction Inc42021–2022
A & G Heating And Cooling LLC42021–2022
Robert Zwicharowski22024–2026
Joseph F Spaeder22021–2026

Companies that also appear in Philadelphia permit records at addresses where William Klotz filed, in any year. Sharing an address is a documented co-appearance, not proof that they worked on the same project or with each other.

Permits on record

159 permits; open the 50 most recent
PermitIssuedCategoryAddress in sourceScope as filedDeclared value
RP-2026-0110312026-10-23Residential Building2839 S 10TH STinstall basement bathroom, no other work included. single family dwelling.
MP-2026-0039542026-10-18Mechanical8031 MANSFIELD AVEEZ PERMIT DUCTWORK & WARM-AIR APPLIANCES- For the installation of New Ductwork, Registers/Grilles/Diffusers, and Warm-Air Appliances as per attached standards. Deviations from the
RP-2026-0110212026-10-07Residential Building8031 MANSFIELD AVE- For alterations to an Existing One Family Dwelling as per attached standard. Deviations from this standard will result in permit revocation and require submission of construction
MP-2026-0047252026-10-06Mechanical3814 MANAYUNK AVEEZ PERMIT DUCTWORK & WARM-AIR APPLIANCES - For the installation of New Ductwork, Registers/Grilles/Diffusers, and Warm-Air Appliances as per attached standards. Deviations from the
ZP-2026-0097162026-09-28Zoning26 OREGON AVEAssembly and Entertainment
RP-2026-0075312026-09-02Residential Building1513 S 2ND STinterior renovations only of an existing single family attached structure, details per plan.
CP-2026-0035962026-09-01Building337 N FRONT STFOR CHANGE OF OCCUPANCY AND LEVEL III ALTERATIONS TO INCLUDE NEW PARTITIONS, 2-HR FLOOR/CEILING ASSEMBLIES AND DWELLING UNIT SEPARATIONS, FIXTURES, FURNISHINGS, FINISHES, ERECTION
RP-2026-0084672026-08-24Residential Building3241 S SYDENHAM ST- For alterations to an Existing One Family Dwelling as per attached standard. Deviations from this standard will result in permit revocation and require submission of construction
RP-2026-0091622026-08-20Residential Building3814 MANAYUNK AVE- For alterations to an Existing One Family Dwelling as per attached standard. Deviations from this standard will result in permit revocation and require submission of construction
RP-2026-0080682026-08-20Residential Building2839 S 10TH ST- For alterations to an Existing One Family Dwelling as per attached standard. Deviations from this standard will result in permit revocation and require submission of construction
RP-2026-0046882026-08-19Residential Building1234 N 29TH STMAKE SAFE PERMIT TO COMPLY WITH UNSAFE VIOLATION CF-2026-009272 TO INCLUDE REPAIRS TO ROOF AND CHIMNEY PER APPROVED PLANS, ENGINEER’S REPORT AND IN ACCORDANCE WITH CODE BULLETIN PM
MP-2026-0039562026-07-14Mechanical1513 S 2ND STEZ PERMIT DUCTWORK & WARM-AIR APPLIANCES - For the installation of New Ductwork, Registers/Grilles/Diffusers, and Warm-Air Appliances as per attached standards. Deviations from the
ZP-2026-0067422026-07-10Zoning1008 GREENWICH STFOR THE ERECTION OF VERTICAL ADDITIONS TO INCLUDE A ROOF DECK AND A ROOF DECK ACCESS STRUCTURE TO AN EXISTING ATTACHED BUILDING. SIZE AND LOCATION AS SHOWN IN APPLICATION/PLANS
MP-2026-0028142026-07-03Mechanical5008 PARRISH STEZ PERMIT DUCTWORK & WARM-AIR APPLIANCES - For the installation of New Ductwork, Registers/Grilles/Diffusers, and Warm-Air Appliances as per attached standards. Deviations from the
MP-2026-0019182026-06-12Mechanical636 KIMBALL STEZ PERMIT DUCTWORK & WARM-AIR APPLIANCES - For the installation of New Ductwork, Registers/Grilles/Diffusers, and Warm-Air Appliances as per attached standards. Deviations from the
MP-2026-0032832026-06-09Mechanical21 WOLF STFOR THE INSTALLATION OF APPLIANCES TO BE INSTALLED IN ACCORDANCE WITH THE MANUFACTURER’S SPECIFICATIONS. FOR USE AS PREVIOUSLY APPROVED. ALL WORK TO BE DONE PER APPROVED PLANS. IF
RP-2026-0055802026-06-08Residential Building7036 SHERWOOD RDFor interior alterations to an existing attached single-family dwelling per plans. Separate permits are required for all associated Mechanical, Electrical, and Plumbing work.
RP-2026-0052572026-06-01Residential Building5008 PARRISH ST- For alterations to an Existing One Family Dwelling as per attached standard. Deviations from this standard will result in permit revocation and require submission of construction
RP-2026-0056262026-05-27Residential Building3241 S SYDENHAM STFOR THE STRUCTURAL REPAIR TO JOISTS AND ROOF TO RESOLVE CASE #CF-2025-133585. A SEPARATE PERMIT IS REQUIRED FOR ANY ADDITIONAL ALTERATIONS THAT ARE NOT SPECIFICALLY ADDRESSED ON CA
CP-2026-0012532026-05-22Building21 WOLF STFOR LEVEL II INTERIOR ALTERATIONS TO VACANT COMMERCIAL TENANT SPACE 1-A (SEPARATE PERMITS REQUIRED PRIOR TO FIT-OUT AND ISSUANCE OF C.O.) TO INCLUDE INSTALLATION OF A NEW ACCESSIBL
CP-2026-0025902026-05-21Building1414 S PENN SQFor level I alteration to dwelling unit 45G within the existing apartment building. Separate permits required for MEP work.
MP-2026-0014072026-05-18Mechanical1439 E PASSYUNK AVEALTERATIONS TO HVAC SYSTEM TO ACCOMODATE NEW SECOND FLOOR LAYOUT AS PER APPROVED PLANS. *2018 IMC REVIEW*
MP-2026-0027622026-05-15Mechanical2226 S 15TH STEZ PERMIT DUCTWORK & WARM-AIR APPLIANCES - For the installation of New Ductwork, Registers/Grilles/Diffusers, and Warm-Air Appliances as per attached standards. Deviations from the
RP-2026-0034602026-05-11Residential Building2226 S 15TH STRenew interior walls as per plans, no structural work, interior doors, and Windows to be replaced in same size and placement
CP-2026-0018672026-05-08Building20 JACKSON STFOR A LEVEL II INTERIOR ALTERATIONS (NO CHANGE IN OCCUPANCY ) TO A PORTION OF AN EXISTING STRUCTURE (SPACE 1C). FOR THE CREATION OF A SHELL SPACE. ALL WORK TO BE DONE PER APPROVED
MP-2026-0013612026-04-14Mechanical2607 S ALDER STEZ PERMIT DUCTWORK & WARM-AIR APPLIANCES - For the installation of New Ductwork, Registers/Grilles/Diffusers, and Warm-Air Appliances as per attached standards. Deviations from the
CP-2026-0011372026-04-01Building38 JACKSON STFOR LEVEL II INTERIOR ALTERATIONS TO CREATE VACANT SPACES AT 2A, 2E, 2F AND 2G (SEPARATE USE / FIT-OUT PERMITS REQUIRED PRIOR TO THE OCCUPANCY) IN AN EXISTING BUILDING. ALTERATIONS
ZP-2026-0025392026-03-25Zoning829 N 40TH STFor the erection of an addition to the rear of an existing semi-detached structure. Size and location as shown in plans.
RP-2025-0095332026-03-24Residential Building636 KIMBALL STEZ PERMIT STANDARDS ALTERATIONS- For alterations to an Existing One Family Dwelling as per attached standard. Deviations from this standard will result in permit revocation and req
CP-2025-0050012026-03-18Building617 S 8TH STFOR A LEVEL III INTERIOR ALTERATIONS TO AN EXISTING STRUCTURE. FOR USE AS A MULTI-FAMILY HOUSEHOLD LIVING FOR THREE(3) DWELLING UNITS. ALTERATIONS TO INCLUDE THE ERECTION OF A RE
CP-2026-0012002026-03-12Building337 N FRONT STFOR THE STRUCTURAL REPAIR TO EXTERIOR WALL, JOISTS AND ROOF TO RESOLVE CASE #CF-2025-083999. A SEPARATE PERMIT IS REQUIRED FOR ANY ADDITIONAL ALTERATIONS THAT ARE NOT SPECIFICALLY
CP-2025-0062992026-03-10Building1439 E PASSYUNK AVEFOR LEVEL I INTERIOR ALTERATIONS TO AN EXISTING DWELLING UNIT. ALTERATIONS TO INCLUDE THE REPLACEMENT OF INTERIOR PARTITION WALLS, FINISHES, DOORS, AND WINDOWS ONLY. ALL WORK TO BE
RP-2026-0021202026-03-05Residential Building2607 S ALDER ST- For alterations to an Existing One Family Dwelling as per attached standard. Deviations from this standard will result in permit revocation and require submission of construction
MP-2026-0008912026-02-20Mechanical1768 S 65TH STEZ PERMIT DUCTWORK & WARM-AIR APPLIANCES- For the installation of New Ductwork, Registers/Grilles/Diffusers, and Warm-Air Appliances as per attached standards. Deviations from the
RP-2026-0009202026-02-17Residential Building2236 MASTER STMAKE SAFE PERMIT- TO MAKE SAFE AS PER SUBMITTED PLANS AND as per Engineer's report repair the fire damaged around the existing stairway to resolve case #CF-2023-067473. Abutting s
CP-2026-0001292026-02-17Building21 WOLF STINTERIOR ALTERATION TO THE FIRST FLOOR OF EXISTING STRCURE TO CREATE NEW COMMERCIAL SPACE (SPACE 1C) AND NEW LOBBY AREA. ALL WORK TO BE DONE PER APPROVED PLANS. IF FIELD CONDITIONS
MP-2026-0005682026-02-10Mechanical601 WOLF STEZ PERMIT DUCTWORK & WARM-AIR APPLIANCES - For the installation of New Ductwork, Registers/Grilles/Diffusers, and Warm-Air Appliances as per attached standards. Deviations from the
MP-2026-0000172026-02-09Mechanical2866 NORMANDY DREZ PERMIT DUCTWORK & WARM-AIR APPLIANCES - For the installation of New Ductwork, Registers/Grilles/Diffusers, and Warm-Air Appliances as per attached standards. Deviations from the
MP-2026-0005632026-02-04Mechanical1400 S 55TH STEZ PERMIT DUCTWORK & WARM-AIR APPLIANCES - For the installation of New Ductwork, Registers/Grilles/Diffusers, and Warm-Air Appliances as per attached standards. Deviations from the
RP-2025-0134132026-02-04Residential Building6622 CLARIDGE ST- For alterations to an Existing One Family Dwelling as per attached standard. Deviations from this standard will result in permit revocation and require submission of construction
RP-2026-0004712026-01-30Residential Building3345 AMBER ST- For alterations to an Existing One Family Dwelling as per attached standard. Deviations from this standard will result in permit revocation and require submission of construction
RP-2025-0134222026-01-29Residential Building1768 S 65TH ST- For alterations to an Existing One Family Dwelling as per attached standard. Deviations from this standard will result in permit revocation and require submission of construction
RP-2026-0004922026-01-21Residential Building5821 HOFFMAN AVE- For alterations to an Existing One Family Dwelling as per attached standard. Deviations from this standard will result in permit revocation and require submission of construction
RP-2025-0130352026-01-16Residential Building1400 S 55TH ST- For alterations to an Existing One Family Dwelling as per attached standard. Deviations from this standard will result in permit revocation and require submission of construction
ZP-2025-0108162026-01-08Zoning617 S 8TH STFOR THE ERECTION OF A REAR ADDITION TO INCLUDE ROOF DECK AND ROOF DECK ACCESS STRUCTURE TO AN EXISTING ATTACHED STRUCTURE. SIZE AND LOCATION AS SHOWN IN APPLICATION/PLANS
ZP-2025-0125622026-01-08Zoning1400 S 55TH STResidential - Household Living - Single-Family
ZP-2025-0125612026-01-08Zoning2740 S FRONT STRetail Sales - Wearing Apparel and Accessories
RP-2025-0130992025-12-29Residential Building2531 S 3RD STMAKE SAFE PERMIT TO COMPLY WITH UNSAFE VIOLATION CF-2025-069330 TO INCLUDE STRUCTURAL REPAIRS TO EXTERIOR MASONRY WALLS PER APPROVED PLANS, ENGINEERS REPORT AND IN ACCORDANCE WITH
MP-2024-0047532025-12-16Mechanical2437 S AMERICAN ST- For the installation of New Ductwork, Registers/Grills/Diffusers, and Warm-Air Appliances as per attached standards. Deviations from these standards require submission of constr
RP-2025-0094262025-11-28Residential Building2866 NORMANDY DRFor the erection of an addition at the second floor level and for interior and exterior alterations to an existing attached single-family dwelling per plans. Separate permits are r

Fields appear as the issuing authority published them, including spelling and blanks. Scope text is the applicant's description of intended work, not an inspection finding.

Source and limits

Public Philadelphia permit records through 2026, counted by distinct permit number. This is a historical filing record: it cannot show current backlog, pricing, crew availability, licensing or insurance, and a quiet period may only mean work was filed elsewhere. Confirm anything commercial with the company and with the issuing authority before acting. How we build these records, and what we withhold →

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