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Property profile

21 Grn St Waltham, MA 02451

OFF-MARKET
Office buildings
Property ID
US38-0945006
3,960 SF 0.13 ac lot Built 1970
Last sale Jan 2023 · $1,374,000
Entity Owned Owner of record is a legal entity (LLC / corporation). 3-yr Hold Held for 3 years. ~ Est. High Equity Modeled equity is high. Estimate, not a fact.
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Market Trends Soon

Ownership intelligence

Who controls the opportunity?

Owner of record from public deeds, plus portfolio, hold profile and investor signals where the data supports them. Included with a plan.

Owner contacts

Can we reach the decision maker?

Skip-traced phones and e-mails of the owner. Included with a plan.

Debts

What is owed, to whom, and when it comes due

Recorded lenders, amounts and estimated maturities of the owner's loan book — included with a plan.

Property tax · 2024

What does the county charge?
$15k
Tax billed · 2024
Assessed value$710k
Assessed land$260k
Assessed improvement$450k
Effective rate2.07%

Value estimate

· Oct 2026
$1.27M
$1.14M – $1.40M
AI approach$1.28M
Submarket $/SF estimate$1.10M

Realmo valuation models over county records and 21 qualifying comparable sales.

Recently sold

What actually traded nearby?
$319/SF
ZIP average, outlier-cleaned · 26 recorded sales of this use type
Observed band · Q1–Q3$176 – $499
Qualifying comparables21

Cap rate analysis

How does the asset earn?

No income signal is modeled for this parcel yet — the Cap Rates tab runs the workflow.

Zoning insight

No data for this section
What can be built here?

No zoning code is on file for this parcel. Coverage grows with every catalog release.

JurisdictionWALTHAM

Location intelligence

Which uses thrive at this corner?
Best fit: Realty agency
Demand heat for this use is drawn on the map · LocInt grid
Demand index
Realty agency22.6
Restaurant21.2
Auto Parts Store17.5

Location

21 Grn St Waltham, MA 02451-1646
County assessor Recorded deeds · 1 transfer 21 qualifying comp sales Zoning catalog · not on file

Every figure names its source: public record, benchmark, or modeled. Coverage varies by property — thin data is stated as missing, never invented.

Comparables

6 recorded sales · 18 properties nearby
Recent sales nearby
6 recorded sales in this ZIP, last 8 years
Address Sale price Sold Size
686 Lincoln, Waltham, MA 02451-2192 $950,000 Mar 2025 2,124 SF
1264 Main, Waltham, MA 02451-1740 $774,000 Apr 2024 4,400 SF
863 Main, Waltham, MA 02451 $1,900,000 Jul 2023 4,875 SF
711717 Main, Waltham, MA 02451-0607 $1,600,000 May 2023 5,681 SF
86 Ww, Waltham, MA 02451-1110 $5,500,000 Apr 2022 5,500 SF
1256 Main, Waltham, MA 02451-1739 $3,000,000 Mar 2020 6,400 SF
Sale prices and dates as our records hold them, one row per building. A deed can cover more of a building than the size shown, so read the price against the size rather than dividing one by the other.
Comparable nearby
6 properties of the same type nearby

Comparable nearby

  • Value Estimation
    $985,000
    3,800 SF
    25 Fox Rd
    OFFICE BUILDING
    25 Fox Rd, Waltham, MA 02451-1008
    View Details
  • Value Estimation
    $1,000,000
    4,181 SF
    935 Main St
    OFFICE BUILDING
    935 Main St, Waltham, MA 02451-7437
    View Details
  • Value Estimation
    $775,000
    4,400 SF
    1264 Main St
    OFFICE BUILDING
    1264 Main St, Waltham, MA 02451-1740
    View Details
  • Value Estimation
    $1,125,000
    4,452 SF
    1344 Main St
    OFFICE BUILDING
    1344 Main St, Waltham, MA 02451-1617
    View Details
  • Value Estimation
    $335,000
    1,902 SF
    57 Grant St
    OFFICE BUILDING
    57 Grant St, Waltham, MA 02451-4439
    View Details
  • Value Estimation
    $530,000
    1,846 SF
    649 Main St
    OFFICE BUILDING
    649 Main St, Waltham, MA 02451-0602
    View Details

Similar in This City for Sale

  • New
    Contact for pricing
    5,547 SF
    Office Units with Covered Parking
    Two office suites offer flexible occupancy options within an elevator-served building near highway access.
    230 2nd Avenue, Waltham, MA 02451
    View Details
  • New
    Contact for pricing
    6,000 SF
    Medical Office Space with Lab Infrastructure
    Configured rooms, dedicated parking, and substantial building systems support medical and laboratory uses, subject to applicable approvals.
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    View Details
  • New
    Contact for pricing
    11,416 SF
    Freestanding Office Building
    Freestanding 11,416 SF office building on 0.81 acres in a transit-oriented Waltham location.
    1273-1275 Main St, Waltham, MA 02451
    View Details
  • New
    $3,650,000
    16,637 SF
    6-Unit Office Condo
    Full-floor office condominium with covered parking and multiple suites for owner-user occupancy.
    02-230 Second Ave, Waltham, MA 02451
    View Details
  • New
    $3,650,000
    16,637 SF
    Full-Floor Office Condo
    Full-floor office condo with covered parking, suited for owner-users or tenant-brokers seeking a consolidated office layout.
    230 2ND Avenue, Unit 2, Waltham, MA 02451
    View Details
  • New
    Contact for pricing
    18,050 SF
    Single-Story Flex Building
    Single-story flex building on 1.03 acres, currently fully leased to an animal hospital with near-term vacancy.
    289 2nd Ave, Waltham, MA 02451
    View Details

Similar Nearby for Lease

  • New
    Contact for pricing
    5,354 sqft
    Multi-Suite Office Property
    Office space is available for lease in a range of configurations within a substantial commercial property.
    1400 Main St, Waltham, MA 02451
    View Details
  • New
    Contact for pricing
    6,173 sqft
    Class A Office Building in Courtyard
    Three-story, multi-tenant Class A office building with highly visible access to major regional routes.
    281 Winter St, Waltham, MA 02451
    View Details
  • New
    Contact for pricing
    6,183 sqft
    Class A Life Science Office Building
    Recently converted office property with upgraded infrastructure for life science use in Waltham’s established corridor.
    21 Hickory Drive, Waltham, MA 02451
    View Details
  • New
    Contact for pricing
    7,484 sqft
    Cafe with Shared Conference Space
    Cafe suite includes full food service access to shared conference space, with ample on-site parking.
    1440 Main St, Waltham, MA 02451
    View Details
  • New
    Contact for pricing
    11,416 sqft
    Freestanding Flex Space Building
    Freestanding flex space on a large lot with a flexible interior layout for office, retail, or light industrial use.
    1273-1275 Main St, Waltham, MA 02451
    View Details
  • New
    Contact for pricing
    14,010 sqft
    Renovated Office Space in Waltham
    Efficient office space with modern upgrades and convenient location.
    610 Lincoln Street - North Building, Waltham, MA 02451
    View Details
Research This Page with AI

Rey answers here. ChatGPT, Grok and Claude get the same data packet.

Includes: Price & PSF · Cap rate · Location · Zoning

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