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Grennan ConstructionRoofer in Pontiac, MI

Grennan Construction is a roofer at 917 Orchard Lake Rd, Pontiac, MI 48341, rated 4.7 from 240 Google reviews. Open Monday to Friday.

Pontiac, MI0 paid placements in any rankingHow we rank

Call (248) 694-8780Website ↗

Key facts

Key facts about Grennan Construction
Address917 Orchard Lake Rd, Pontiac, MI 48341Get directions
Phone(248) 694-8780
Websitegrennanconstruction.com
HoursMonday to Friday: 8 AM – 5:15 PM
Google rating4.7 from 240 Google reviews

Trades

Each trade shows the evidence we matched it on.

  • Roofingmain tradeGoogle main category
  • Sidingadditional Google category
  • Windowsadditional Google category

Service area

Serves Pontiac and 11 towns within 40 miles: West Bloomfield Township, Auburn Hills, Waterford, Birmingham, Beverly Hills, Troy, Rochester Hills, Farmington Hills, Walled Lake, Rochester and Clawson.

Based in Pontiac, MIView on map

Opening hours

Opening hours for Grennan Construction
DayHours
Monday8 AM – 5:15 PM
Tuesday8 AM – 5:15 PM
Wednesday8 AM – 5:15 PM
Thursday8 AM – 5:15 PM
Friday8 AM – 5:15 PM
SaturdayClosed
SundayClosed
  • Open evenings — no
  • Open Saturdays — no
  • Open Sundays — no

Typical roofing prices

Typical roofing prices
JobLowTypicalHigh
Roof replacementPer project: asphalt shingles on a 1,700 sq ft home (about 2,000 sq ft of roof). US national range × 0.92 East North Central factor (2025 Cost vs. Value Report)$6,880$9,180$12,850
Roof repairPer repair: typical range of customer-reported jobs. US national range$395$1,174$1,968

Market ranges for the trade, checked October 2026, not a quote from this business. Ask for a written estimate.

Reviews

ContractorsRanked reviews

No ContractorsRanked reviews yet

Google

4.7from 240 Google reviews

Hired Grennan Construction? Write a review

Questions about Grennan Construction

What are Grennan Construction’s hours?

Grennan Construction is open Monday to Friday. Its listed hours are Monday to Friday, 8 AM – 5:15 PM. It is closed on Saturdays and closed on Sundays. Hours come from the business listing; holiday hours may differ.

What areas does Grennan Construction serve?

Serves Pontiac and 11 towns within 40 miles: West Bloomfield Township, Auburn Hills, Waterford, Birmingham, Beverly Hills, Troy, Rochester Hills, Farmington Hills, Walled Lake, Rochester and Clawson. The list is based on the business's location and the usual service radius for roofing. Confirm your address is covered when you call.

What do Google reviews say about Grennan Construction?

Grennan Construction has a rating of 4.7 from 240 Google reviews. The CR Score adjusts the star rating for review count, so a high rating from a few reviews counts for less than the same rating from many.

How do I contact Grennan Construction?

Call Grennan Construction on (248) 694-8780. The business is at 917 Orchard Lake Rd, Pontiac, MI 48341. Its website is linked in the key facts on this page. Ask for a written estimate before any work starts.

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