$549,900
122 Crossfield Rd, King Of Prussia, PA 19406
Listed by Keller Williams Real Estate-Blue Bell
Welcome to 512 Firethorn Road, where an incredible King of Prussia location meets the kind of outdoor space that is becoming nearly impossible to find. Situated on nearly 15,000 square feet of land on one of the largest lots in the neighborhood, this move-in-ready 4-bedroom home offers an exceptional combination of indoor living space, outdoor entertaining, storage, and convenience. If a large backyard and outdoor entertaining space are on your wish list, this one delivers. A massive deck stretches across the rear of the home, creating an incredible setup for outdoor dinners, grilling, parties, entertaining, or hosting friends and family. Beyond the deck is an expansive fenced backyard with plenty of room for kids, pets, games, gardening, a future fire pit, or simply enjoying your own private outdoor space. The established gardens make the property even more special. Years of care have created mature garden beds filled with flowering plants, trees, and colorful blooms that transform throughout the seasons. From vibrant spring flowers to lush summer gardens, this is landscaping and character that simply can't be created overnight. Be sure to check out the seasonal photos to see the gardens in full bloom! Inside, the freshly painted, move-in-ready interior is filled with natural light. The main level offers comfortable living and dining spaces plus a kitchen with generous cabinetry, granite countertops, and plenty of workspace. The home features four bedrooms, including an expansive upper-level fourth bedroom offering flexibility as a bedroom, home office, guest space, or private retreat. Plumbing is directly accessible to this level, creating exciting potential for another full bathroom in the future. Above it is an impressive amount of additional storage. The finished lower level adds even more flexible living space for a family room, home office, playroom, workout area, hobby room, or combination of uses, along with a convenient half bath and dedicated laundry/utility area. Recent Updates include: Brand New Heating/AC System, Roof & Carpeting less than 5 years old. And then there's the location. You're minutes from King of Prussia Mall, King of Prussia Town Center, Valley Forge National Historical Park, restaurants, shopping, entertainment, Routes 202 and 422, I-76, PA Turnpike making commuting and everyday life incredibly convenient. Four bedrooms. Nearly 15,000 square feet of property. One of the neighborhood's largest lots. A huge entertaining deck. Expansive fenced backyard. Established gardens. Move-in-ready interior. Flexible finished space. Exceptional storage. And an unbeatable location in the heart of King of Prussia. 512 Firethorn Road offers the space to spread out, the backyard to bring everyone together, and the location to put everything within reach.
How the bedrooms and baths are distributed across the floors, as reported by the listing agent.
| Date | Event | Price |
|---|---|---|
| Aug 20, 2026 | Listed for sale | $625,000 |
Price changes are tracked from when NookLocal first indexed this listing; earlier history may not appear. Tax & assessment details are in the section below.
Estimated value
$587,000
Automated estimate, not an appraisal. Sale records through July 2026.
Based on 10 comparable sales nearby, the Montgomery County assessment ratio, weighted toward the current asking price.
| Address | Closed | Sale price | Bd/Ba | Sqft | Adjusted value |
|---|---|---|---|---|---|
| 248 W BEIDLER RD, KING OF PRUSSIA, PA 19406 | August 2026 | $650,000 | 3/2 | 1,848 | $598,228 |
| 167 E VALLEY FORGE RD, KING OF PRUSSIA, PA 19406 | July 2026 | $490,000 | 3/2 | 1,808 | $453,613 |
| 394 STONYBROOK RD, KING OF PRUSSIA, PA 19406 | January 2026 | $416,500 | 3/1 | 1,784 | $461,166 |
| 278 ROBERTS DR, KING OF PRUSSIA, PA 19406 | April 2026 | $555,000 | 3/1 | 1,702 | $593,322 |
| 670 V ST, KING OF PRUSSIA, PA 19406 | August 2025 | $450,000 | 3/1 | 1,802 | $506,965 |
| 411 CROSSFIELD RD, KING OF PRUSSIA, PA 19406 | July 2025 | $390,000 | 3/1 | 1,764 | $422,840 |
Estimated at current rates
$4,979 / year
≈ $415 per month
MLS shows (2026)
$5,121
-2.8% at current rates
School tax
UPPER MERION AREA · 24.01 mills (2025-26)
$3,360
County tax
Montgomery County · 5.95 mills (2026)
$833
Municipal tax
As recorded for 2026, varies by municipality
$786
Recomputed from the county assessment ($139,930, 1996 base year) × current millage. School millage is from the latest year certified by the Pennsylvania Department of Education (2025-26); districts adopt the next year's budgets each June, and we update when the state certifies the statewide file in the fall. Portals typically reprint the recorded 2026 bill. Pennsylvania does not reassess on sale. Estimate only. Verify with Montgomery County before relying on it. Learn more: PA property tax calculator · Common Level Ratio by county.
Loan term
Estimated monthly payment
$3,735/mo
Taxes use NookLocal's estimate at current millage rates, not the stale figure on the MLS. The default rate is the average 30-year rate as of July 2026; insurance is estimated at 0.35% of the price per year. Below 20% down, lenders usually add mortgage insurance, which this estimate doesn't include. Estimate only; verify before relying on it.
School district
Upper Merion Area
2025 PA state assessments (PSSA / Keystone) and graduation data. The index measures student outcomes, not school effectiveness, and is not adjusted for demographics. Districts serve all residents; verify enrollment boundaries with the district.
Safety data
Montgomery County crime & safety numbers →
County figures from FBI and Pennsylvania source data.
Property taxes
Montgomery County taxes, explained →
Millage, the Common Level Ratio, and what changes after you buy.
© BRIGHT, All Rights Reserved
Information Deemed Reliable But Not Guaranteed
The data relating to real estate for sale on this website appears in part through the BRIGHT Internet Data Exchange program, a voluntary cooperative exchange of property listing data between licensed real estate brokerage firms in which United Real Estate Strive 212 participates, and is provided by BRIGHT through a licensing agreement.
IDX listings are displayed pursuant to broker of record United Real Estate Strive 212, Frank Ramos, Broker/Owner, PA Broker License RM424345, 1220 Broadcasting Rd, Suite 201, Wyomissing, PA 19610, (610) 372-0212.
The information provided by this website is for the personal, non-commercial use of consumers and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing.
Some properties which appear for sale on this website may no longer be available because they are under contract, have Closed or are no longer being offered for sale.
Data last updated: August 22, 2026 at 2:05 AM EDT
Our co-founder Carmen does a 1-on-1 needs analysis with you, then hand-picks a vetted King of Prussia agent or lender. Free, no obligation. If you work with a partner we introduce, NookLocal may earn a referral fee from their broker.