Marcus Knudsen

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Marcus Knudsen Lead Home Inspector and Florida Realtor Hey, I’m Marcus — Lead Inspector for Gray Home Inspections and a licensed Florida Realtor based in Jacksonville.

After spending over a decade in the Navy, attention to detail became second nature. That same precision now guides my work inspecting homes and helping clients make confident, informed decisions about one of the biggest investments of their lives. I’ve seen it all — from brand new homes hiding major issues to beautifully maintained properties built decades ago. My goal is to make the inspection process easy to understand, educational, and even a little bit interesting. When I’m not inspecting homes or showing properties, you’ll usually find me competing in a variety of events, exploring new trails, or spending time with my son, Myles.

10/18/2026

I brought a special guest to yesterday’s open house, and apparently I’ve been doing home tours all wrong 😂

Myles decided to take over and give everyone a tour from a 6-year-old’s perspective. From bedrooms to the “chicken nugget cooker,” he made sure to point out all the important features.

I feel fortunate to have such a good showing assistant!!

398 Turtle Cove Dr
Orange Park, FL 32073
Listing Agent: Thomas Zhang
Keller Williams Atlantic Partners

KellerWilliamsAtlanticPartners

10/10/2026

Should you get a 4-point inspection before listing your home? 🏡

Not necessarily.

A 4-point inspection can provide valuable information, but that doesn’t mean every seller needs one before putting their home on the market.

A knowledgeable Realtor should already be researching the home’s major systems, including the roof, HVAC, plumbing, and electrical.

For example, let’s say permit records indicate your roof is 15 years old. Rather than immediately ordering a 4-point inspection, it may make more sense to have a licensed roofer evaluate its condition and estimate its remaining useful life.

The goal? Identify potential issues before they become surprises during the transaction.

With my background in home inspections, I bring a different perspective to helping buyers and sellers navigate these decisions.

Thinking about selling? Let’s make sure you’re prepared before that sign goes in the yard.

10/09/2026

Lake views and nearly half an acre in St. Augustine? 👀🏡

I had the opportunity to tour this beautiful property during a recent Broker Open, and it’s definitely worth a look!

Whether you’re drawn to the peaceful lake views, the spacious lot, or simply having a little more room to enjoy the outdoors, this home has plenty to offer.

📍 929 Lake Sanford Ct, St. Augustine, FL 32092

Interested in learning more or scheduling a private showing? Send me a message!

Listing courtesy of:
Corrine “Connie” Dickman
📞 904-580-1553
📧 [email protected]
Keller Williams Atlantic Partners

09/19/2026

IYKYK about the GFCI… 😂

If you’ve been following along, you probably know I recently decided to make a pretty big career change.

After more than six years in home inspections, I’m excited to officially start my next chapter as a Realtor with Keller Williams Atlantic Partners! 🏡

I may be changing careers, but I’m definitely not done talking about houses.

On this page, I’ll be sharing what I’ve learned over the years along with real estate, new construction, home maintenance, market trends, and information I hope is actually useful — whether you’re buying, selling, investing, or already own your home.

And you don’t have to be ready to buy or sell to reach out. If you have a question about your home, real estate, or you’re just not sure where to start, give me a call or send me a message.

Excited for what’s ahead. Hope you’ll follow along!

09/11/2026

Jacksonville — this is one worth checking out. ☕️🥾

I’ve had the opportunity to talk with Phil at Morning Oil a few times, and the more I’ve learned about what they’re building, the more I’ve loved the concept.

Morning Oil is built around the skilled trades - the electricians, plumbers, builders, mechanics, landscapers, tree professionals and everyone else who keeps our communities moving.

But it goes well beyond putting trade names on bags of coffee.

For every pound of coffee sold, $1 is committed to New Boots, helping create opportunities for the next generation entering the trades.

And tomorrow, their Grand Opening is supporting an even bigger local mission: helping reopen The ARK and create a pathway to housing, mentorship, skilled-trade training and careers for young men looking for a fresh start.

📍 700 E. Union St., Jacksonville
📅 Saturday, September 12
⏰ 9 AM–3 PM

Coffee, food trucks, vendors, music, the trades and a pretty incredible mission behind all of it.

If you're around Jacksonville tomorrow, stop by, grab a cup and see what they're building.

I have a feeling you'll be hearing a lot more about Morning Oil. ☕️

12/04/2025

Gray Home Inspections was called Batman today because we show up with all the gadgets… and this sewer scope proved why it matters.

Cracked PVC line, soil + roots already inside the pipe, and a plumber had to break through concrete to fix it.

As a home inspector and a licensed Realtor, this is exactly why I always recommend a sewer scope. Hidden issues like this can cost thousands of dollars to repair — and catching them early can save a deal.

11/26/2025

When you expect normal defects… and instead find the DIY Olympics going on under the house.

Yes, those are paint buckets.

No, they’re not supposed to hold up your floors.

11/21/2025

🚨 This is why you ALWAYS get a new construction inspection!

We found an active leak from the tub, standing water, and carpet soaked in a brand-new home — and the builder still hadn’t completed repairs on our re-inspection.

Don’t assume “new” means perfect. Protect your investment and catch issues before closing!

11/14/2025

Crawlspace surprises: two ducts completely disconnected. Your AC was cooling the crawlspace, not the home.

👋 Hey Duuuval — I’m Marcus!I’m the Lead Inspector with Gray Home Inspections and a licensed Florida Realtor with Herron ...
11/10/2025

👋 Hey Duuuval — I’m Marcus!

I’m the Lead Inspector with Gray Home Inspections and a licensed Florida Realtor with Herron Real Estate— and I’ve spent years inspecting homes all across Jacksonville.

I’m a Navy veteran, a proud dad, and someone who’s always been obsessed with understanding how things work — especially houses.

My goal is simple: help homeowners and buyers see what others miss.

Follow along for inspection finds, real estate insight, and a look at what’s really happening behind the walls.

🏠 Jacksonville, FL | Gray Home Inspectionse

Address

120 FL-13
Fruit Cove, FL
32259

Telephone

+19047900591

Website

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