Matthew Chang

License: 83279; State contractor license record
Listed as: engineer
Firm: J5 Infrastructure
Based in: Irvine
On San Francisco permits: Nov 2021 to Apr 2022

13 permits since 2000 (engineer on 13 permits): 11 completed, 1 never finaled, 1 expired or cancelled.

CompletedIn progressNever finaledExpired or cancelled

This is the city’s permit record, not a license check: the role and the number come from what was written on each permit (the number spelled one way). It does not show whether the license is current. How to read these records

Most recent permits

Filed	Outcome	Address	Contractor	Work described on the permit	Declared cost
Apr 11, 2022	Completed final sign-off Nov 2022	833 Mission St	Electric Tech Construction Inc	at&t (4th and mission): remove 1 panel antenna and 1 rru. relocate rru. install 2 panel antennas within frp screen. install 1 4478b12a and 2 diplexers. swap 1 dc6 box for dc9. install 1 power trunk and 1 fiber trunk within (e) cabletray. remove unused coax, install 1 6648 baseband unit and 1 purcell Details Permit 202204111947 Status complete Filed Apr 11, 2022 Permit issued Oct 14, 2022 Final sign-off Nov 15, 2022 Declared cost $45,000 Address 833 Mission St at&t (4th and mission): remove 1 panel antenna and 1 rru. relocate rru. install 2 panel antennas within frp screen. install 1 4478b12a and 2 diplexers. swap 1 dc6 box for dc9. install 1 power trunk and 1 fiber trunk within (e) cabletray. remove unused coax, install 1 6648 baseband unit and 1 purcell Open the permit page	$45,000
Mar 24, 2022	Completed final sign-off Nov 2022	1155 Bryant St	Electric Tech Construction Inc	mod cell site:r/r 6 antennas,3panel,3 air antennas;r/r 2 radomes.decom umts unit,remove 2 strings of 155ah batteries.remove 3 strongs of 155 batt from (e) rba-72 dcpp cabinet.install 2 new strings of 1900ah batteries in (e) inflight cab & 3 190ah in rba-72 cabinet. Details Permit 202203240756 Status complete Filed Mar 24, 2022 Permit issued Oct 11, 2022 Final sign-off Nov 21, 2022 Declared cost $60,000 Address 1155 Bryant St mod cell site:r/r 6 antennas,3panel,3 air antennas;r/r 2 radomes.decom umts unit,remove 2 strings of 155ah batteries.remove 3 strongs of 155 batt from (e) rba-72 dcpp cabinet.install 2 new strings of 1900ah batteries in (e) inflight cab & 3 190ah in rba-72 cabinet. Open the permit page	$60,000
Mar 14, 2022	Expired or cancelled cancelled Jan 2026	2775 Van Ness Av		at&t: remove + replace 6 antennas behind (e) frp screen, decom umts 850. install new rf safety signs, battiers + stripping. remove 2 ex 2v battery system. install 1 distribution panel, 2 power extend converters, 1 new rack with 4 strings 190 ah batteries, 1 new 6648 bbu/mux in (e) rack. Details Permit 202203149892 Status cancelled Filed Mar 14, 2022 Declared cost $45,000 Address 2775 Van Ness Av at&t: remove + replace 6 antennas behind (e) frp screen, decom umts 850. install new rf safety signs, battiers + stripping. remove 2 ex 2v battery system. install 1 distribution panel, 2 power extend converters, 1 new rack with 4 strings 190 ah batteries, 1 new 6648 bbu/mux in (e) rack. Open the permit page	$45,000
Mar 10, 2022	Completed final sign-off Oct 2022	2 Henry Adams St	Ericsson Inc Dba E U S Inc	at&t: remove + install 9 antennas, 3 rru's. install 6 new twin diplexers, 1 new antenna mount, rf safety signs, barriers + stripping. remove/replace 16 batteries. remove 1 5216 from rack. install 3 rectifiers, 4 new battery in (e) dcpp, 2 new seismic wall bracing. 1 6648 baseband in (e) rack. Details Permit 202203109637 Status complete Filed Mar 10, 2022 Permit issued Jul 1, 2022 Final sign-off Oct 7, 2022 Declared cost $45,000 Address 2 Henry Adams St at&t: remove + install 9 antennas, 3 rru's. install 6 new twin diplexers, 1 new antenna mount, rf safety signs, barriers + stripping. remove/replace 16 batteries. remove 1 5216 from rack. install 3 rectifiers, 4 new battery in (e) dcpp, 2 new seismic wall bracing. 1 6648 baseband in (e) rack. Open the permit page	$45,000
Feb 24, 2022	Completed final sign-off Jun 2022	1188 Franklin St	Ericsson Inc Dba E U S Inc	at&t: remove and replace 6 antennas. remove 6 rrus, relocate 3 rrus. install 3 new dc9 boxes, (3) 6awg dc power trunks to new dc9's. install 1 new stackable battery enclosure w/ 8 new 190ah batteries within. 4 new rectifiers in (e) dcpp. remove (12) 155ah, 2 duw and (1) 5216. install 3 support beams Details Permit 202202248588 Status complete Filed Feb 24, 2022 Permit issued Apr 12, 2022 Final sign-off Jun 22, 2022 Declared cost $55,000 Address 1188 Franklin St at&t: remove and replace 6 antennas. remove 6 rrus, relocate 3 rrus. install 3 new dc9 boxes, (3) 6awg dc power trunks to new dc9's. install 1 new stackable battery enclosure w/ 8 new 190ah batteries within. 4 new rectifiers in (e) dcpp. remove (12) 155ah, 2 duw and (1) 5216. install 3 support beams Open the permit page	$55,000
Feb 10, 2022	Completed final sign-off Apr 2024	114 07th St	Invertice Inc	at&t: remove + replace 12 antennas. remove 4 (e) rrus 11b12. remove 4 rrus b5. install 4 rrus 4449 b5/b12. 4 dc6 squids. 4 #6 awg dc power trunks. (n) rf safety signs, barriers + stripping on rooftop. 3 rectifiers in (e) dcpp cabinet. 1 dc12 box. Details Permit 202202107711 Status complete Filed Feb 10, 2022 Permit issued Aug 19, 2022 Final sign-off Apr 22, 2024 Declared cost $65,000 Address 114 07th St at&t: remove + replace 12 antennas. remove 4 (e) rrus 11b12. remove 4 rrus b5. install 4 rrus 4449 b5/b12. 4 dc6 squids. 4 #6 awg dc power trunks. (n) rf safety signs, barriers + stripping on rooftop. 3 rectifiers in (e) dcpp cabinet. 1 dc12 box. Open the permit page	$65,000
Jan 27, 2022	Completed final sign-off Jul 2022	180 Geary St	Ericsson Inc Dba E U S Inc	at&t: modification cell-site. remove and replace 6 panel antennas, relocate 1 rru, install 1 dc9 box per sector-total 3, install (3) #6 awg power trunk, install new rf safety signs, stripping/barriers at rooftop. remove (4) 160 ah batteries, install 3 rectifiers in (e) dcpp, 1 new dc012rm in (e)rack Details Permit 202201276738 Status complete Filed Jan 27, 2022 Permit issued Jun 8, 2022 Final sign-off Jul 1, 2022 Declared cost $65,000 Address 180 Geary St at&t: modification cell-site. remove and replace 6 panel antennas, relocate 1 rru, install 1 dc9 box per sector-total 3, install (3) #6 awg power trunk, install new rf safety signs, stripping/barriers at rooftop. remove (4) 160 ah batteries, install 3 rectifiers in (e) dcpp, 1 new dc012rm in (e)rack Open the permit page	$65,000
Jan 11, 2022	Completed final sign-off May 2024	589 Howard St	Invertice Inc, Electric Tech Construction Inc	roof - unmanned cell site mod: r/r 2 panel antennas per sector (6 total). reloc 1 (e) antenna per sector (3 total). remove 3 rrus 11b12 and repl with 3 rru & 4478b12a. install (n) radomes to enclose antennas (9).install 4 rectifers in (e) dc power plan. 1 (n) 6648 bbu in (e) rack. Details Permit 202201115718 Status complete Filed Jan 11, 2022 Permit issued Mar 8, 2022 Final sign-off May 17, 2024 Declared cost $85,000 Address 589 Howard St roof - unmanned cell site mod: r/r 2 panel antennas per sector (6 total). reloc 1 (e) antenna per sector (3 total). remove 3 rrus 11b12 and repl with 3 rru & 4478b12a. install (n) radomes to enclose antennas (9).install 4 rectifers in (e) dc power plan. 1 (n) 6648 bbu in (e) rack. Open the permit page	$85,000
Jan 11, 2022	Completed final sign-off Nov 2022	901 Market St	Metropolitan Electrical Construction	roof - cell site: mod to unmanned telecomm: r/r 3 panel antennas; remove 24-155ah batts & replace with 20(n) 190ah batts; 1(n) rectifer in (e) dc power plant. install 1 (n) 6448 baseband unit in (e) purcell cabinet. Details Permit 202201115717 Status complete Filed Jan 11, 2022 Permit issued Sep 15, 2022 Final sign-off Nov 15, 2022 Declared cost $85,000 Address 901 Market St roof - cell site: mod to unmanned telecomm: r/r 3 panel antennas; remove 24-155ah batts & replace with 20(n) 190ah batts; 1(n) rectifer in (e) dc power plant. install 1 (n) 6448 baseband unit in (e) purcell cabinet. Open the permit page	$85,000
Dec 21, 2021	Completed final sign-off Sep 2022	250 Clay St	Metropolitan Electrical Construction	at&t: replace 2 antennas, add 2 antennas, relocate 2 natennas, relocate 2 rru's, install 2 rru's, install 2 antennas mounts, install new rf safety signs and striping, install 1 rectifier, install 1 bbu. Details Permit 202112214793 Status complete Filed Dec 21, 2021 Permit issued Apr 7, 2022 Final sign-off Sep 26, 2022 Declared cost $25,000 Address 250 Clay St at&t: replace 2 antennas, add 2 antennas, relocate 2 natennas, relocate 2 rru's, install 2 rru's, install 2 antennas mounts, install new rf safety signs and striping, install 1 rectifier, install 1 bbu. Open the permit page	$25,000
Dec 3, 2021	Completed final sign-off Oct 2022	726 Polk St	Metropolitan Electrical Construction	at&t :remove & replace 6 antennas, r&r 9 rru; with 6 nw rrus; 3 nw diplexers. remove 2 extg rbs 2206 cabinet, 1 dc power plant & install 1 nw 7100 dc power plant. install 20 155ah batteries in extg rack. install 12 190 ah batteries in nw 7100 dc, & 8 in extg battery rack, 11 rectifiers in 7100 cab, Details Permit 202112033621 Status complete Filed Dec 3, 2021 Permit issued Mar 3, 2022 Final sign-off Oct 20, 2022 Declared cost $90,000 Address 726 Polk St at&t :remove & replace 6 antennas, r&r 9 rru; with 6 nw rrus; 3 nw diplexers. remove 2 extg rbs 2206 cabinet, 1 dc power plant & install 1 nw 7100 dc power plant. install 20 155ah batteries in extg rack. install 12 190 ah batteries in nw 7100 dc, & 8 in extg battery rack, 11 rectifiers in 7100 cab, Open the permit page	$90,000
Nov 8, 2021	Never finaled filed Nov 2021, never issued	1625 Owens St		modify to (e) t-mobile telecommunication facility: install (n) 25 kwh diesel generator; (n) auto transfer switch(ats) on (n) cmu wall; (n) 6lb fire extinguisher on (n) cmu wall; (n) generator emergency e-stop on cmu wall; (n) cmu wall enclosure; (n) raised equipment pad. Details Permit 202111081961 Status filed Filed Nov 8, 2021 Declared cost $40,000 Address 1625 Owens St modify to (e) t-mobile telecommunication facility: install (n) 25 kwh diesel generator; (n) auto transfer switch(ats) on (n) cmu wall; (n) 6lb fire extinguisher on (n) cmu wall; (n) generator emergency e-stop on cmu wall; (n) cmu wall enclosure; (n) raised equipment pad. Open the permit page	$40,000
Nov 3, 2021	Completed final sign-off Feb 2023	701 Mission St	Electric Tech Construction Inc	modificaton of an (e) at&t wireless facility, antenna location: remove and replace (12) anatennas (4-new air anatennas and 8 new panel antennas) decomission units equipment, equipment location install (3) strings of 160 ah batteries in (e) cabs and (3) rectifers in (e) cabs Details Permit 202111031706 Status complete Filed Nov 3, 2021 Permit issued Dec 6, 2022 Final sign-off Feb 14, 2023 Declared cost $185,000 Address 701 Mission St modificaton of an (e) at&t wireless facility, antenna location: remove and replace (12) anatennas (4-new air anatennas and 8 new panel antennas) decomission units equipment, equipment location install (3) strings of 160 ah batteries in (e) cabs and (3) rectifers in (e) cabs Open the permit page	$185,000