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Single Family ResidenceResidential
$495,259$164 / ft²
TopHap EstimateOur estimate of what this home would sell for today, based on nearby sales, the home's size and features, and local price trends. It is a starting point, not an appraisal.· confidence 75How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Jul 14, 2026

603 ROUTE 129

LOUDON, NH 03307
3
Beds
1
Baths
3,028 ft²
Living AreaTotal finished area of the structures, from county records. Some counties include shared space like hallways or a building gym, so it may not match a listing.
5.22 ac
Lot SizeThe size of the land the home sits on, from county records.
1989
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$495K
$372K low$619K high
Est. Owner EquityRoughly how much of the home's value the owner would keep after paying off known loans. It is our estimate minus the loans still owed.$305,259
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$244,207
Loan-to-ValueHow much is still owed on the home compared to what it is worth. 80% means loans equal 80% of our estimate, so it shifts when the estimate does.38%
1st MortgageA loan still believed to be open on this home, in the order lenders get repaid. The first position is paid back before the second.$190,000
LAKE SUNAPEE BANK NH · recorded Mar 2, 2010

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$6,923 (2025)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$304,300 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$96,400
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$207,900
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$455,525

Climate Risk

Overall riskThe average of the five hazard scores below, on a 0 to 100 scale. Higher means greater projected risk over the coming decades.36
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
11
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
56
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
90
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
25
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
FEMA Flood ZoneFEMA's flood zone for this address. Zones starting with A or V are high risk, and lenders usually require flood insurance there.minimal

Scores 0–100; higher = greater projected risk.

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
StyleThe architectural style of the home, such as ranch or colonial.Contemporary
CountyMERRIMACK
Lot (acres)The size of the land the home sits on, from county records.5.22
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.Forced Air With Air Conditioning
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(1)

Sales and refinances filed with the county for this home. Not every transfer is a normal sale, so check the type before comparing prices.

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

E
Loudon Elementary SchoolD-
Elementary · Grades KG–5 · 2.9 mi
M
Merrimack Valley Middle SchoolC
Middle · Grades 6–8 · 8.4 mi
H
Merrimack Valley High SchoolC-
High · Grades 9–12 · 8.5 mi

District: Merrimack Valley School District

Neighborhood · ZIP 03307These are comparison scores, not percentages. 100 equals the national average, so 150 means about 50% above average.

CrimeLocal crime compared with the rest of the country, where 100 is average. It reflects things like population density, income, and how crime gets reported.65
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.86
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.117

Index scale: 100 = US average (tick). Lower is better.

Homes occupiedThe share of homes here that someone lives in. The rest sit empty, including vacation and for-sale homes.97%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.22%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.10%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.7%
PopulationHow many people live in this area.5,935
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.119 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$87,284
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$114,619
Average tempThe average temperature here across a full year.45°F
Annual precipHow much rain and melted snow falls here in a typical year.43 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.54%

Ownership

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Owner occupied
Company ownedWhether the owner is a company or trust rather than a person.No

Data by ATTOM. Valuations are automated estimates, not appraisals. Photos from Google Street View and may not depict the current property state.

How this home compares

603 Route 129 measured against every home in its neighborhood, its ZIP code and its county, using county assessor records refreshed nightly. A home can stand out in one of those areas and look ordinary in another, because each one holds a different mix of homes.

  • Worth more than 77% of homes in Loudon 03307
  • Costs less per square foot than 95% of homes in Merrimack County
  • Bigger than 88% of homes in Merrimack County
  • Has a bigger lot than 82% of homes in Merrimack County
  • Newer than 67% of homes in Merrimack County

What homes are worth in Loudon 03307

Each bar is how many homes fall in that price range. The marker is this home.

This home
$250K$726K

This home is worth more than 77% of homes in Loudon 03307.

How it measures up in Loudon 03307

The dot is this home. The mark in the middle is the typical home in Loudon 03307.

Estimated value$495,259
CheaperTypical $402,307Pricier

Pricier than 77% of homes nearby

Price per ft²$164
CheaperTypical $196Pricier

Pricier than 19% of homes nearby

Living area3,028 ft²
SmallerTypical 1,979 ft²Bigger

Bigger than 86% of homes nearby

Lot size5.22 ac
SmallerTypical 2.49 acBigger

Bigger than 75% of homes nearby

Year built1989
OlderTypical 1987Newer

Newer than 56% of homes nearby

How 603 Route 129 ranks against every home in each area.
MeasureThis homeLoudon 03307Merrimack County
Estimated valuepricier than$495,25977% of homes59% of homes
Price per ft²pricier than$16419% of homes5% of homes
Living areabigger than3,028 ft²86% of homes88% of homes
Lot sizebigger than5.22 ac75% of homes82% of homes
Year builtnewer than198956% of homes67% of homes

About 603 Route 129

How much is 603 Route 129, Loudon, NH worth?

The TopHap Estimate for 603 Route 129, Loudon, NH is $495,259 as of Jul 14, 2026. The likely range is $371,733 to $618,785. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 603 Route 129, Loudon, NH last sell?

603 Route 129, Loudon, NH last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 603 Route 129, Loudon, NH?

603 Route 129, Loudon, NH has 3 bedrooms, 1 bathrooms, 3,028 square feet of living space and a 5.22-acre lot.

When was 603 Route 129, Loudon, NH built?

603 Route 129, Loudon, NH was built in 1989, making it 37 years old. It is a contemporary home. The building has 1 story.

What schools serve 603 Route 129, Loudon, NH?

603 Route 129, Loudon, NH is assigned to Loudon Elementary School (elementary), rated D-; Merrimack Valley Middle School (middle), rated C; Merrimack Valley High School (high), rated C-. All sit in Merrimack Valley School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 603 Route 129, Loudon, NH compare to other homes in Loudon 03307?

Among the 2,195 homes in Loudon 03307, it is worth more than 77% of them ($495,259 against a typical $402,307), its price per square foot is higher than 19% of them ($164 against a typical $196), it is bigger than 86% of them (3,028 ft² against a typical 1,979 ft²), its lot is bigger than 75% of them (5.22 ac against a typical 2.49 ac) and it is newer than 56% of them (1989 against a typical 1987). Measured against all of Merrimack County, it is worth more than 59% of homes there. These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 603 Route 129, Loudon, NH?

The 2025 property tax bill for 603 Route 129, Loudon, NH was $6,923. The county assessed it at $304,300.

Closest homes

More homes in Loudon 03307

Assigned schools

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