Xiang Liu

License: M37088; Look the license up with the state
Listed as: engineer
Firm: Comfort Dynamics
On San Francisco permits: Feb 2018 to Sep 2026

6 permits since 2000 (engineer on 6 permits): 4 completed, 2 in progress.

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
Sep 11, 2026	In progress issued Sep 2026	201 Mission St	Richlen Construction	mech: replace duct work, transfer fan relocation, supply air diffusers, rework flexible inlet duct connectors, install new balancing dampers where required. check all hvac equip. elec: new lighting fixtures and associated circuiting /controls, new power and signal devices and associated wiring. ref Details Permit 202609118019 Status issued Filed Sep 11, 2026 Permit issued Sep 16, 2026 Declared cost $337,875 Address 201 Mission St mech: replace duct work, transfer fan relocation, supply air diffusers, rework flexible inlet duct connectors, install new balancing dampers where required. check all hvac equip. elec: new lighting fixtures and associated circuiting /controls, new power and signal devices and associated wiring. ref Open the permit page	$337,875
Jun 25, 2026	In progress issued Jul 2026	221 Main St	Richlen Construction	suite 400: reconfigure existing ductwork, ceiling diffusers, and grilles. provided vav boxes and suspended transfer air fan. Details Permit 202606253891 Status issued Filed Jun 25, 2026 Permit issued Jul 7, 2026 Declared cost $75,000 Address 221 Main St suite 400: reconfigure existing ductwork, ceiling diffusers, and grilles. provided vav boxes and suspended transfer air fan. Open the permit page	$75,000
Jun 4, 2026	Completed final sign-off Sep 2026	201 Mission St	Richlen Construction	21 fl - ste: 2150 - hvac relocate (e) difusers, air grills, modify heat pump add thermostats. mech deferred for 202605201639 Details Permit 202606042534 Status complete Filed Jun 4, 2026 Permit issued Jun 10, 2026 Final sign-off Sep 10, 2026 Declared cost $60,000 Address 201 Mission St 21 fl - ste: 2150 - hvac relocate (e) difusers, air grills, modify heat pump add thermostats. mech deferred for 202605201639 Open the permit page	$60,000
Jan 22, 2026	Completed final sign-off Jul 2026	201 Mission St	Richlen Construction	23rd flr. mep permit for approved architectual scope. new fsd and supply diffusers. new lighting and power. ref pa#: 202510308608. Details Permit 202601224304 Status complete Filed Jan 22, 2026 Permit issued Feb 12, 2026 Final sign-off Jul 20, 2026 Declared cost $249,348 Address 201 Mission St 23rd flr. mep permit for approved architectual scope. new fsd and supply diffusers. new lighting and power. ref pa#: 202510308608. Open the permit page	$249,348
Apr 14, 2021	Completed final sign-off Jun 2022	632 Commercial St		ref to pa# 201912200174 & pa# 20191220175; mechanical & commercial lighting permit only, basement level 1 ,level 2 commercial lighting and mechanical only, level 5 mechanical only Details Permit 202104148548 Status complete Filed Apr 14, 2021 Permit issued Mar 17, 2022 Final sign-off Jun 30, 2022 Declared cost $50,000 Address 632 Commercial St ref to pa# 201912200174 & pa# 20191220175; mechanical & commercial lighting permit only, basement level 1 ,level 2 commercial lighting and mechanical only, level 5 mechanical only Open the permit page	$50,000
Feb 15, 2018	Completed final sign-off Mar 2019	201 Mission St	Novo Construction Inc	2/f: mechanical and electrical work for ti. ref pa 2018-0117-8781 Details Permit 201802151356 Status complete Filed Feb 15, 2018 Permit issued Feb 27, 2018 Final sign-off Mar 22, 2019 Declared cost $150,000 Address 201 Mission St 2/f: mechanical and electrical work for ti. ref pa 2018-0117-8781 Open the permit page	$150,000