90% range 52.6–60.6

SONNTAG DESIGN GROUP

Architect · Ann Arbor, MI · #27 of 119 listed overall

Primary kind of workCommercial alterations55% of last-3-year permits · #13 of 61 commercial alterations specialists

activefeaturedhigh confidence

Overall score: 50 = peer average for the same role and the same kind of work (e.g. window jobs are compared with window jobs, remodels with remodels). Based on 52 permits (49 STREAM + 3 A2Trak).

Sub-scores

Inspections47

typical

Failed / re-inspection results on 22% of inspections vs 19% expected for similar jobs

Plan quality / Revisions62

better than peers

0.72 plan send-backs / revision events per permit vs 1.26 expected for similar jobs

Time to permit55

better than peers

Median 15 days to approval vs 21 days peer median (0.80× after adjusting for kind of work)

Completion47

typical

13% of issued permits expired/voided without final vs 11% expected

More: compliance & reliability

Compliance58

better than peers

0.08 license/insurance/stop-work type holds per permit vs 0.11 expected

Reliability65

better than peers

2% of inspections cancelled vs 4% expected

Ann Arbor activity & plain stats

Permits in scored set

Last 3 years

Last 12 months

Years active

2020–2026

Median days to approval

peer median 21.0

Permits needing a revision

46%

Permits with a failed / re-inspection

48%

Inspections on record

157

Job mix

Kinds of work across all 52 permits. Each permit is scored against peers doing the same kind of work.

Commercial alterations 58% (30)Decks & porches 21% (11)Windows & doors 8% (4)Foundation / structural 6% (3)Roofing 4% (2)Siding / envelope 2% (1)Remodels 2% (1)

Score by kind of work

Commercial alterations · 30 permits

Decks & porches · 11 permits

Shown for kinds of work with 5+ permits. 50 = peer average for that kind of work.

Sample permit records

A sample of the public records behind this card. Links open the city's permit portals.

Permit	Kind of work	Applied	Status	Days to approval	Notes
BLDGC25-0119	Commercial alterations	2025-03-28	Final	38	inspection Final [BLD]: Re-inspection required inspection Foundation/Rebar [BLD]: Partial Pass inspection Rough-In [BLD]: Re-inspection required inspection Rough-In [BLD]: Partial Pass plan submittal v1 requires re-submit
BLDG21-1941	Siding / envelope	2021-09-24	FINALED	46	inspection FINAL: CONDITIONAL APPROVAL inspection TEMP COFO: CONDITIONAL APPROVAL inspection FINAL: FAILED review PLAN REVIEW: COMMENTS ISSUED review BUILDING: RETURNED
BLDGC25-0134	Commercial alterations	2025-04-04	Final	213	inspection Above Ceiling/Grid [BLD]: Partial Pass inspection Rough-In [BLD]: Partial Pass 5 eReview file(s) sent back for resubmittal Permit placed on hold for more information
BLDGC24-0076	Commercial alterations	2024-03-05	Void	—	—
BLDGC23-0455	Commercial alterations	2023-10-18	Final	17	—
BLDGC23-0220	Decks & porches	2023-05-15	Withdrawn	—	—

Related Commercial alterations firms

See all ratings · How scores work

Scores update as new permit activity lands. Not a recommendation to hire. Report an error.