InspectTownhouse
Inspection Estimator

Know exactly what you're buying.

Townhouse inspections are different. Party walls, shared plumbing, rooftop decks — configure your property and get an instant scope and flat-rate price.

$475
flat rate
11–14
est. defects
1d
report turnaround
Scope includes: Roof deck & membrane, Party wall penetrations, Foundation & subfloor
Fixed price. No surprise add-ons. Cancel up to 24h before.
Field data · 2,147 inspections · updated Feb 2026

These numbers are not marketing. They come from 2,147 completed townhouse reports filed in the DC–Baltimore–Northern Virginia corridor since 2019.

0
Townhouses Inspected

Exclusively townhouse-form properties — no single-family houses, no generic checklists.

0.0
Avg. Defects Found Per Unit

Across all size brackets. Pre-2000 stock averages 14.2. Most sellers disclose fewer than 3.

$0K
Avg. Negotiation Savings

Documented price reductions, repair credits, or walk-aways our reports enabled at closing.

Next available slot: Mon Mar 2 — 3 slots remaining this week
InterNACHI Certified Inspectors
E&O + General Liability Insured
24-Hour Report Turnaround
DC · VA · MD Service Area
What we actually inspect

Four systems that fail in townhouses. Only in townhouses.

A generic home inspection misses these entirely. Each section below pairs our field explanation with an actual redacted report excerpt.

SYSTEM 01HIGH RISK

Party Wall Integrity

"The wall you share is the one that surprises you."

Party walls are load-bearing, fire-rated, and acoustically critical — and every penetration for pipes, wires, or HVAC ducts is a potential fire-stop failure or moisture bridge. Sellers rarely know the condition of what's inside. We probe, we test, we document.

Compromised fire-stop caulk at 3 pipe penetrations
Moisture reading 19% at base of east party wall
Non-rated drywall patch over original brick
$12,000–$40,000
Typical remediation when caught late
PARTY WALL — SECTION 4.2
HIGH
LocationEast party wall, basement level
ToolTramex CME5 moisture meter
Reading19.2% (threshold: 16%)
VisualEfflorescence present, 18" band
RecommendationInvasive investigation
RiskHIGH — active moisture intrusion
Thermal: 61°F cold band indicates moisture path
All readings logged with timestamp, GPS coordinate, and tool serial number.
SYSTEM 02CRITICAL RISK

Roof-to-Unit Water Path

"Water follows gravity. The path always leads to your living room."

Townhouse rooftop decks accumulate standing water, crack at membrane seams, and drain into parapet walls that connect directly to interior framing. A single failed drain collar costs $400 to fix — after it's failed. After it's soaked three floors of drywall, that number is $28,000.

Membrane bubbling at southeast corner — 3 sq ft
Drain collar not sealed to deck surface
Parapet flashing lifted on north edge
$8,000–$28,000
Interior water damage from failed roof membrane
ROOF DECK — SECTION 2.1
CRITICAL
LocationRooftop deck, southeast quadrant
ToolVisual + probe + moisture scan
Membrane conditionFair — localized bubbling
Drain collarUNSECURED — gap 0.5"
Parapet flashingLifted — north edge 4'
RecommendationIMMEDIATE repair priority
Thermal: Saturated substrate visible under membrane
All readings logged with timestamp, GPS coordinate, and tool serial number.
SYSTEM 03MEDIUM RISK

Shared-Line Plumbing

"Your neighbor's drain is your problem."

Townhouses share drain stacks. A clogged or deteriorated main stack affects every unit tied to it. Cast-iron stacks in pre-1990 buildings show interior scale buildup that reduces flow capacity by 40–60% before any visible symptom. We run a camera where others stop at the cleanout.

Cast-iron stack: 60% scale buildup at basement junction
No isolation valve on unit supply line
PVC-to-cast-iron transition joint cracked
$4,500–$18,000
Shared drain stack replacement — your share
PLUMBING — SECTION 6.3
MEDIUM
LocationBasement stack — unit cleanout
ToolRidgid SeeSnake camera
Scale buildupSIGNIFICANT — 60% bore reduction
PVC transition jointCRACKED — active seep
Isolation valveNOT PRESENT
RiskMEDIUM-HIGH — failure within 3–5 years
All readings logged with timestamp, GPS coordinate, and tool serial number.
SYSTEM 04HIGH RISK

HVAC Zoning & Shared Ducts

"You're conditioning air that belongs to three other units."

Multi-zone HVAC in townhouses is routinely misconfigured. We've found units paying to heat shared corridors, ductwork crossing fire-rated assemblies without proper dampers, and condensate lines draining into wall cavities. One afternoon with a balometer and a smoke pencil reveals what years of utility bills couldn't explain.

Zone 2 damper stuck open — conditioning common area
Condensate line discharging into wall cavity
Return air duct crosses party wall — no fire damper
$3,200–$11,000
Duct remediation and zone rebalancing
HVAC — SECTION 5.4
HIGH
LocationAir handler, 3rd floor mechanical closet
ToolBalometer + smoke pencil + IR camera
Zone 2 damperINOPERATIVE — stuck open
Condensate drainDISCHARGING into wall cavity
Fire damperABSENT at party-wall duct crossing
RiskHIGH — code violation + active moisture
Thermal: Condensate moisture path visible in wall cavity
All readings logged with timestamp, GPS coordinate, and tool serial number.
Who we serve

Three types of clients. One shared fear.

The six-figure surprise hiding behind the drywall. We eliminate it before it's yours.

First-Time Buyer

You don't know what you don't know.

You've never owned a townhouse. The seller's disclosure says "no known issues." The listing photos were shot at f/1.8. You have no idea what's behind the drywall on the party wall side.

Our report translates every finding into plain language with a severity tier, estimated repair cost, and a recommended action. You walk into closing knowing exactly what you're buying — or exactly why you're walking away.

"We used the report to negotiate $22,000 off the asking price. Our agent said she'd never seen documentation that thorough."

Priya Nair, Clarendon VA — closed Nov 2025
Real Estate Attorney

Your client needs leverage in writing.

Verbal assurances don't survive escrow disputes. You need timestamped, GPS-tagged, tool-referenced findings that hold up in a demand letter — and ideally prevent you from needing one.

Every finding in our report includes tool model, serial number, reading timestamp, and exact location coordinates. The format was built with disclosure litigation in mind. It's been cited in 14 demand letters.

"I've stopped recommending generic inspectors to my buyer clients. This report format is the only one I've seen that's actually usable in a dispute."

Marcus Webb, Esq., DC Real Estate Litigation
Relocating Executive

Your offer is Thursday. You need answers by Wednesday.

You're moving from Seattle. You've seen the unit twice on FaceTime. Your offer deadline is 72 hours away and you can't afford to fly back for a second look.

We confirm availability within the hour. We can typically schedule within 48 hours of booking. The report is delivered within 24 hours of the inspection — formatted for executive summary reading in under 10 minutes.

"Booked at 9 a.m., inspection done by 2 p.m., report in my inbox by 8 a.m. next morning. That's what Thursday deadlines require."

David Okonkwo, relocated from Chicago — Georgetown DC
Download Sample Report first →
InspectTownhouse
REPORT #IT-2847
Property Inspection Report
2847 N. Randolph St. Unit B
Arlington, VA 22207 · Townhouse · 1,640 sq ft · 1998
14
Total Findings
2
Critical
5
High
4
Medium
3
Low
$48K
Est. Cost
Inspector: T. Holloway, InterNACHI #NACHI23091402 · Feb 27, 2026 · 9:14 AM EST · 38°F, Clear
Real estate attorneys and buyers reviewing documents at a closing table, professional setting
"Every page of this report paid for itself."

Across 2,147 inspections, our clients have documented an average of $38,000 in negotiated savings, repair credits, or avoided purchases. The inspection costs less than one hour of the attorney's time you'll spend disputing a defect after closing.

Download Sample Report
Client outcomes

Real buyers. Real savings. Real closings.

$34,000 avoided

"The moisture readings on the party wall saved us from a $34,000 mistake. The seller's disclosure said "no known water issues." Our inspector found a 19% moisture reading at the base of the east wall within the first 20 minutes."

Priya Nair, First-time buyer, Clarendon VA
Priya Nair
First-time buyer, Clarendon VA
3 demand letters supported

"I've used this report format in three demand letters. The GPS-tagged, timestamped findings with tool serial numbers are exactly what you need when a seller disputes a material defect claim. This is the only inspection service I recommend to my buyer clients."

Marcus Webb, Esq., Real estate litigation attorney, Washington DC
Marcus Webb, Esq.
Real estate litigation attorney, Washington DC
$9,500 repair credit

"I was relocating from Chicago and had seen the unit twice on FaceTime. The report was in my inbox by 8 a.m. the morning after the inspection. I used the HVAC findings to get a $9,500 repair credit. Closed Thursday."

David Okonkwo, VP Operations, relocated to Georgetown DC
David Okonkwo
VP Operations, relocated to Georgetown DC
$18,000 price reduction

"The report cover page alone gave our attorney everything she needed to open negotiations. Fourteen pages of annotated findings with cost estimates. Seller came down $18,000 the next morning."

Sarah Kim, Buyer, Capitol Hill DC
Sarah Kim
Buyer, Capitol Hill DC
$14,000 credit secured

"We almost missed the drain stack issue entirely — our previous inspector didn't camera the cleanout. The cast-iron scale buildup would have been a $14,000 surprise within two years. Caught it, credited it, closed anyway."

James Holloway, Buyer, Navy Yard DC
James Holloway
Buyer, Navy Yard DC
Sample inspection report

See exactly what you get before you pay.

Our sample report is a redacted copy of a real 2025 inspection — 47 pages, 14 findings, full thermal imaging, moisture meter logs, and annotated photographs. Not a marketing brochure.

Executive summary page — readable in 4 minutes
Party wall section with thermal imaging stills
Annotated roof deck photographs with measurement markers
Drain camera screenshots with scale buildup classification
Defect severity matrix with remediation cost estimates
Inspector credentials and tool serial number log
Download Sample Report
47 pages · PDF · Instant delivery

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Your offer deadline is real.
So is the crack in the party wall.

The inspection costs $395–$565. The average finding saves $38,000. The math is not complicated.

Download Sample Report first →
Fixed price · Cancel 24h before · No hidden fees
From $395 · flat rate