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Why Your Listing’s Bedroom Count Might Be Wrong

A $1.5M Central NJ home passed through two prior sales with the wrong bedroom and bathroom count. No one caught it — until we pulled the township records.

Due DiligenceBuyer Protection
The StoryWhy Counts Are WrongHow to VerifyWhy It MattersFAQ

MLS bedroom counts can be wrong — and the consequences are expensive. The most reliable documentation for bedroom and bathroom count in New Jersey comes from the township Construction Department (building permits and original CO) and the Health Department (septic approvals) — not MLS listings, tax records, or visual walkthroughs. Tang Group Real Estate verifies every listing against township records before our clients close.

A $1.5M Home With the Wrong Count

During a recent transaction in Montgomery Township, our due diligence uncovered something no one had caught in over two decades: the home was listed as 5 bedrooms and 4.5 bathrooms, but the Certificate of Occupancy showed 4 bedrooms and 3.5 bathrooms.

The basement was explicitly marked "NOT APPROVED FOR USE AS A BEDROOM" on the original permit. A second-floor room labeled "playroom" on the CO was being marketed as a bedroom. And one of the bathrooms had no plumbing permit anywhere in 22 years of township records.

Two prior agents and one prior sale had missed all of it. The discrepancy had gone undetected for over two decades — through multiple transactions, appraisals, and inspections.

We even tracked down the original design engineer who built the septic system ten years earlier — because sometimes the history of a property matters as much as its current condition.

The septic system was designed for 4 bedrooms. The home was listed as 5. That means the septic could be undersized for the marketed use of the home — a Health Department issue on top of the building permit issue.

This is not about blame. It is about what happens when due diligence stops at the MLS listing and the visual walkthrough. The township records told a completely different story — and no one had pulled them.

Why Bedroom Counts Are Wrong More Often Than You Think

There is no automatic system that connects township building records to MLS listings. The bedroom count on your listing comes from one of three places — and none of them are authoritative:

  • The listing agent's walkthrough. Most agents count rooms that look like bedrooms. A room with a closet and a window gets counted — even if the township never approved it as a bedroom.
  • The seller's disclosure. Sellers report what they believe is true. If they bought the home as a "5 bedroom" and never checked, that number carries forward.
  • Tax records. Municipal tax assessments are notoriously unreliable for room counts. Assessors often copy prior records without verifying permits.

The most reliable sources are the building permits and original Certificate of Occupancy from the township Construction Department, and the septic approval from the Health Department. These documents specify exactly which rooms are approved for which use — and most buyers and agents never request them.

How to Verify Before You Close

Here is the process we follow on every transaction — and what any buyer should demand from their agent:

1
Request the Certificate of Occupancy and building permits. Call the township Construction Department directly. A general OPRA request may not return the CO — you must specifically request all building permits, Certificates of Occupancy, and approved floor plans.
2
Pull the full permit history. File an OPRA request for every building, plumbing, and electrical permit on the property. Look for gaps — a finished bathroom with no plumbing permit is a red flag.
3
Cross-reference the CO against the MLS listing. Compare bedroom count, bathroom count, and room designations. Any mismatch requires investigation.
4
Check septic capacity (if applicable). For homes on septic systems, the septic permit specifies a bedroom count. If the home is listed as 5 bedrooms but the septic is designed for 4, that is a critical issue — adding a bedroom requires an upgraded septic system ($20K-$50K+).
5
Contact the Health Department separately. Building codes (Construction Department) and health codes (Health Department) are enforced under different sets of state laws. A modification approved by one department may not be compliant with the other. For septic homes, you need records from both.
This is part of our standard process. Every Tang Group buyer client gets a full permit and CO verification before closing. Holly Tang has been cross-referencing township records for 22 years — long before most agents even knew what an OPRA request was.

Why the Legal Bedroom Count Matters

An incorrect bedroom count is not a technicality. It has real financial consequences:

Home value drops immediately

A 4-bedroom home is worth significantly less than a 5-bedroom in the same neighborhood. In Central NJ, the difference can be $50,000-$150,000+ depending on the municipality, neighborhood, and overall square footage.

Appraisal problems

If the appraiser discovers the bedroom count discrepancy, the appraisal may come in low — potentially killing your financing or requiring renegotiation.

Septic system liability

A septic system designed for 4 bedrooms cannot legally serve a 5-bedroom home. Upgrading a septic system in NJ costs $20,000-$50,000+. The Montgomery Township Health Department confirmed this for us directly on the case above.

Resale complications

When you sell, the next buyer's agent may catch the discrepancy — and you will be the one who has to explain it, disclose it, and potentially absorb the cost of remediation.

Bedroom Count FAQ
Request the Certificate of Occupancy (CO) and all building permits from the township Construction Department. For septic homes, also request septic approvals from the Health Department. These are the most reliable sources for approved bedroom and bathroom counts. Tax records and MLS listings can be wrong. File a specific OPRA request naming the documents you need.
A Certificate of Occupancy (CO) is a document issued by the township Construction Department certifying that a building meets building codes and is approved for occupancy. The original construction CO and associated building permits specify the approved use of each room. Note: a resale CCO (Continuing Certificate of Occupancy) may only confirm smoke detector compliance, not room designations.
No. MLS listings are populated by listing agents based on what they observe or what the seller reports. There is no requirement to verify against township building records. We have personally seen homes where the MLS count was wrong for over 20 years and across multiple sales. The most reliable sources are building permits, the original CO, and septic approvals.
The legal bedroom count affects home value, appraisal, septic capacity, resale value, and potentially your mortgage approval. An incorrect count can cost tens of thousands of dollars. See our home inspection guide →
Unpermitted rooms are not legally recognized. The homeowner may need to obtain retroactive permits (which requires meeting current building codes), remove the unpermitted work, or disclose the issue to future buyers. Unpermitted work can also create insurance liability and complicate resale.
Yes. Pulling the Certificate of Occupancy, cross-referencing it against the MLS listing, and reviewing the full permit history is part of our standard due diligence process on every buyer transaction. Holly Tang has been doing this for 22 years. Book a consultation →
Related Resources
Home Inspection GuideBuy a HomeNJ Closing CostsFirst-Time Buyer GuideSchool District Guide

Your agent should verify what you are buying.

Before you close on your next home, make sure your agent has pulled the CO, checked the permits, and cross-referenced the township records. Or work with one who already does.

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