# 403 E DIAMOND Avenue, Gaithersburg, MD 20877 > **TL;DR:** 3bd/2ba single family, $690,840 ($260/sqft), built 1899, 2,652 sqft. Est. $3,694/mo. Listed 7 days. ## Property at a Glance | Attribute | Value | |-----------|-------| | Price | $690,840 | | Price/sqft | $260 | | Bedrooms | 3 | | Bathrooms | 1 full, 1 half | | Square Feet | 2,652 | | Year Built | 1899 | | Lot Size | 10,890 sqft (0.25 acres) | | Stories | 2 | | Property Type | Single Family (Other) | | Status | Active | | Days on Market | 7 | ## Estimated Monthly Costs | Category | Amount | |----------|--------| | Principal & Interest (20% down, 30-year at 6.5%) | $3,493 | | Estimated Insurance | $201 | | **Total** | **$3,694** | ## Property Highlights - Built in 1899 - 0.25 acre lot - 2 stories ## Description ### Agent Description PRIME OLDE TOWNE GAITHERSBURG - INVESTMENT & REDEVELOPMENT OPPORTUNITY! Excellent opportunity in the heart of Historic Olde Towne! Located at 403 E Diamond Ave, this two-story residential/commercial property features 3 bedrooms, 2 bathrooms, a den, living room, and approximately 6 parking spaces. Property requires complete renovation and is sold STRICTLY AS-IS. REDEVELOPMENT POTENTIAL! According to the seller, the Historic Preservation Board determined that the building is not historically protected and that demolition is at the owner's discretion, subject to applicable City requirements and permits. Prime location within walking distance of restaurants, shops, Olde Towne Plaza, and the MARC train station. The City has identified Olde Towne for revitalization and streetscape improvements, adding to the area's appeal. IMPORTANT: Buyer is responsible for all due diligence and must independently verify zoning, permitted residential/commercial uses, parking, Historic Preservation Board findings, demolition requirements, and redevelopment possibilities directly with the City of Gaithersburg. All uses and improvements are subject to required approvals. Information is deemed reliable but not guaranteed. PHOTO DISCLOSURE: Photos include actual property conditions and digitally enhanced renderings showing potential improvements such as painting, new windows, and lighting. Images are presented back-to-back for comparison. Renderings are illustrative only and do not reflect current conditions. BRING YOUR VISION AND EXPLORE THE POSSIBILITIES! ## Location - **Address:** 403 E DIAMOND Avenue, Gaithersburg, MD 20877 - **County:** MONTGOMERY - **Neighborhood:** DEER PARK - **Coordinates:** 39.13886, -77.20973 - **Google Maps:** https://www.google.com/maps?q=39.13886,-77.20973 ## Listing Agent - **Name:** Daniel J. Demers · **License:** 5004796 - **Brokerage:** Sell Your Home Services - **Broker Phone:** (508) 952-0541 - **Listing URL:** [View original listing](https://www.realtor.com/realestateandhomes-detail/403-E-Diamond-Ave_Gaithersburg_MD_20877_M92970-88181?f=listhub&s=TRENDPA&m=MDMC2261366&c=propsimple) ## Photos ![403 E DIAMOND Avenue - Photo 1](http://lh.rdcpix.com/e0830766290681754783ca40d4e782c8l-f2865535943r.jpg) ![403 E DIAMOND Avenue - Photo 2](http://lh.rdcpix.com/e0830766290681754783ca40d4e782c8l-f3346983895r.jpg) ![403 E DIAMOND Avenue - Photo 3](http://lh.rdcpix.com/e0830766290681754783ca40d4e782c8l-f303969721r.jpg) ![403 E DIAMOND Avenue - Photo 4](http://lh.rdcpix.com/e0830766290681754783ca40d4e782c8l-f3558040168r.jpg) ![403 E DIAMOND Avenue - Photo 5](http://lh.rdcpix.com/e0830766290681754783ca40d4e782c8l-f2469094784r.jpg) ![403 E DIAMOND Avenue - Photo 6](http://lh.rdcpix.com/e0830766290681754783ca40d4e782c8l-f3288722454r.jpg) ![403 E DIAMOND Avenue - Photo 7](http://lh.rdcpix.com/e0830766290681754783ca40d4e782c8l-f1417930349r.jpg) ![403 E DIAMOND Avenue - Photo 8](http://lh.rdcpix.com/e0830766290681754783ca40d4e782c8l-f1764810972r.jpg) ![403 E DIAMOND Avenue - Photo 9](http://lh.rdcpix.com/e0830766290681754783ca40d4e782c8l-f1539554010r.jpg) ![403 E DIAMOND Avenue - Photo 10](http://lh.rdcpix.com/e0830766290681754783ca40d4e782c8l-f136036610r.jpg) ![403 E DIAMOND Avenue - Photo 11](http://lh.rdcpix.com/e0830766290681754783ca40d4e782c8l-f1187283658r.jpg) ![403 E DIAMOND Avenue - Photo 12](http://lh.rdcpix.com/e0830766290681754783ca40d4e782c8l-f3167274492r.jpg) ![403 E DIAMOND Avenue - Photo 13](http://lh.rdcpix.com/e0830766290681754783ca40d4e782c8l-f2924090928r.jpg) ![403 E DIAMOND Avenue - Photo 14](http://lh.rdcpix.com/e0830766290681754783ca40d4e782c8l-f2838657126r.jpg) ![403 E DIAMOND Avenue - Photo 15](http://lh.rdcpix.com/e0830766290681754783ca40d4e782c8l-f2799497407r.jpg) ![403 E DIAMOND Avenue - Photo 16](http://lh.rdcpix.com/e0830766290681754783ca40d4e782c8l-f1859548409r.jpg) ![403 E DIAMOND Avenue - Photo 17](http://lh.rdcpix.com/e0830766290681754783ca40d4e782c8l-f3953306424r.jpg) ![403 E DIAMOND Avenue - Photo 18](http://lh.rdcpix.com/e0830766290681754783ca40d4e782c8l-f2156834617r.jpg) ![403 E DIAMOND Avenue - Photo 19](http://lh.rdcpix.com/e0830766290681754783ca40d4e782c8l-f1979994647r.jpg) ![403 E DIAMOND Avenue - Photo 20](http://lh.rdcpix.com/e0830766290681754783ca40d4e782c8l-f1834933168r.jpg) ![403 E DIAMOND Avenue - Photo 21](http://lh.rdcpix.com/e0830766290681754783ca40d4e782c8l-f1874315137r.jpg) ![403 E DIAMOND Avenue - Photo 22](http://lh.rdcpix.com/e0830766290681754783ca40d4e782c8l-f1474168418r.jpg) ![403 E DIAMOND Avenue - Photo 23](http://lh.rdcpix.com/e0830766290681754783ca40d4e782c8l-f1583069715r.jpg) ![403 E DIAMOND Avenue - Photo 24](http://lh.rdcpix.com/e0830766290681754783ca40d4e782c8l-f4184811434r.jpg) ![403 E DIAMOND Avenue - Photo 25](http://lh.rdcpix.com/e0830766290681754783ca40d4e782c8l-f1301622767r.jpg) ![403 E DIAMOND Avenue - Photo 26](http://lh.rdcpix.com/e0830766290681754783ca40d4e782c8l-f2836783036r.jpg) ![403 E DIAMOND Avenue - Photo 27](http://lh.rdcpix.com/e0830766290681754783ca40d4e782c8l-f508309861r.jpg) ![403 E DIAMOND Avenue - Photo 28](http://lh.rdcpix.com/e0830766290681754783ca40d4e782c8l-f2646751064r.jpg) ![403 E DIAMOND Avenue - Photo 29](http://lh.rdcpix.com/e0830766290681754783ca40d4e782c8l-f241734612r.jpg) ![403 E DIAMOND Avenue - Photo 30](http://lh.rdcpix.com/e0830766290681754783ca40d4e782c8l-f2767514048r.jpg) --- **MLS#:** MDMC2261366 | **Updated:** 2026-10-27 **Source:** listhub *Copyright © 2026 Bright MLS. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.* [View on PropertySimple](https://www.propertysimple.ai/listing/403-e-diamond-avenue-gaithersburg-md-20877-06bfd8f0e4ef45f39ded7ba4b9ef0b2e) --- ## Structured Data ```json { "@context": "https://schema.org", "@type": "RealEstateListing", "@id": "https://www.propertysimple.ai/listing/403-e-diamond-avenue-gaithersburg-md-20877-06bfd8f0e4ef45f39ded7ba4b9ef0b2e#listing", "url": "https://www.propertysimple.ai/listing/403-e-diamond-avenue-gaithersburg-md-20877-06bfd8f0e4ef45f39ded7ba4b9ef0b2e", "name": "403 E DIAMOND Avenue, Gaithersburg, MD 20877", "description": "PRIME OLDE TOWNE GAITHERSBURG - INVESTMENT & REDEVELOPMENT OPPORTUNITY! Excellent opportunity in the heart of Historic Olde Towne! 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