Join Gromadzki Real Estate — Florida's 100% commission real estate brokerage. $499 per closed deal, $0 monthly. Serving Keystone and all of Hillsborough County.
Keystone sits within Hillsborough County's broader suburban corridor — a market characterized by mid-range pricing, family-relocation buyer flow, and steady (if not dramatic) appreciation. Agents who work this market typically build their business on long-term relationships and referral networks.
At Gromadzki Real Estate, the structure is straightforward: $499 per closed transaction. $0 monthly. $0 annual. You keep 100% of the commission on every closed deal in Keystone or anywhere else in Florida. Full broker support, modern technology, and training are included.
Keystone sits in one of Hillsborough County's most expensive corners, so the commission math cuts deeper here than the county median suggests. The Hillsborough single-family median was $445,155 in mid-2026, up 1.2% year over year (Redfin, June 2026) — roughly $13,355 gross on a 3% side. A 25% split hands the brokerage about $3,339 of that every closing; Gromadzki takes a flat $499. But Keystone isn't a median market: the Odessa/Keystone 33556 typical value runs near $664,000 (Zillow, 2026), and lakefront and equestrian estates trade far higher. On large-lot deals where a 3% side clears $20,000-$30,000, a percentage split is the single biggest line item an agent gives away.
Sources: Redfin (Hillsborough County, June 2026); Florida Realtors / Stellar MLS monthly release (June 2026, published July 17, 2026); Greater Tampa REALTORS® / Tampa Bay MLS (days on market, supply, and % of list, May–June 2026). County single-family data is used as the anchor; Keystone/Odessa (33556) trades well above the county median — large-lot, lakefront, and equestrian properties (Zillow / Homes.com / NeighborhoodScout, 2026).
Keystone is a semi-rural CDP in northwest Hillsborough County — inside the Odessa 33556 ZIP, west of Citrus Park and Lutz, bordering Pasco County near Tarpon Springs. There's no standalone monthly MLS report for a community this size, so the honest read comes from county single-family data plus local ZIP figures. As of June 2026 the Hillsborough County single-family median was $445,155, up 1.2% year over year (Redfin, June 2026), with single-family supply around 4.2 months and climbing from roughly 3.7 in the spring (Greater Tampa REALTORS® / Tampa Bay MLS, June 2026). Homes sat a median ~58 days on market countywide, up from the low-40s a year earlier, and sellers received about 96.4% of list (Tampa Bay MLS, May–June 2026) — a market that has cooled toward balance but stayed short of a true buyer's market.
Keystone itself sits well above those numbers. The Odessa/Keystone (33556) typical value runs near $664,000 (Zillow, 2026), the Odessa–Keystone neighborhood median printed around $526,950 in June 2026 (Homes.com, June 2026), and NeighborhoodScout pegs the Keystone neighborhood median near $1.18 million — pricier than roughly 95% of Florida neighborhoods (NeighborhoodScout, 2026). The spread between the ZIP's mid-$600s typical value and its million-dollar estate tier is the whole story here: this is an acreage, lakefront, and equestrian market where the "median" hides a very wide luxury band.
What buyers pay for in Keystone is land and privacy. The area is built around a chain of lakes — Lake Keystone, Island Ford Lake, Church Lake, and Lake Rogers among them — with multi-acre parcels, gated luxury enclaves like The Eagles golf community and Stonebrier, and true horse properties with barns, paddocks, and riding trails. Homes range from the high $300s for smaller parcels to well over $2 million for lakefront and equestrian estates (Homes.com / Zillow, 2026). It's one of the few places this close to Tampa where an agent routinely writes offers on five-acre lots, private docks, and fenced acreage zoned for horses.
School quality reinforces the premium. Keystone feeds Steinbrenner High School, consistently one of Hillsborough's top-rated public high schools, along with Martinez Middle and the area elementaries — a draw that keeps family demand strong at the upper price points even as the broader county cools. Because so much of the inventory is bespoke — custom builds, older homesteads on big lots, waterfront with wildly different frontage and elevation — pricing is far less "comparable-driven" than a subdivision. Agents who can read a large-lot comp set, value private lake frontage and equestrian improvements, and market to relocation and luxury buyers are the ones who win these listings. That expertise is exactly what a flat-fee model rewards and a percentage split quietly taxes.
Keystone keeps its country feel by design: much of it runs on private wells and septic systems rather than municipal utilities, roads like Gunn Highway, Van Dyke Road, and Race Track Road stay two-lane and tree-lined, and lot sizes keep density low. That rural character sits minutes from the Suncoast Parkway (Veterans Expressway), which puts Tampa International Airport, Westchase, and downtown Tampa inside a straightforward commute — the combination of acreage-and-quiet with a fast highway into the metro is the core value proposition, and it's why buyers accept well/septic ownership and longer service drives.
The trade-off is a thin, slow-moving luxury pipeline. High-end, large-lot inventory turns over infrequently, days on market at the top end run longer than the county's ~58-day figure (Tampa Bay MLS, June 2026), and a meaningful share of buyers at these price points pay cash or bring large down payments, so deals hinge on appraisal navigation and private-water/septic, survey, and flood/elevation diligence more than on financing. Insurance underwriting on lakefront and older custom homes adds another layer. This is not a market where volume carries an agent — it's one where a handful of well-run, well-marketed listings per year define the income, which makes the per-closing fee structure the number that actually matters.
At the county median the split looks survivable; at Keystone price points it doesn't. Take a $1,000,000 Keystone sale — an ordinary lakefront or equestrian number here, not an outlier. A 3% listing side grosses $30,000. A 25% split brokerage keeps $7,500 of that one check; a 20% split keeps $6,000 — before monthly fees, desk fees, or tech charges. At Gromadzki, that same closing costs $499 flat, so roughly $5,500-$7,000 stays with the agent on a single luxury sale. The higher the price, the more a percentage split costs you, which is precisely backwards from how the work scales — a $1M listing isn't ten times harder than a $445K one (Redfin county median, June 2026).
Run it across a year. An agent closing eight sides averaging $650,000 — realistic for the 33556 typical value (Zillow, 2026) — grosses about $156,000 at 3% per side. A 25% split brokerage keeps roughly $39,000 of that; a 20% split, about $31,200. At Gromadzki those eight closings cost $3,992 total, leaving about $27,000-$35,000 more in the agent's pocket every year. Keystone agents belong to Greater Tampa REALTORS® and list through Stellar MLS, one of the country's largest MLSs — so a single membership covers Odessa, Lutz, Westchase, Citrus Park, and across Tampa Bay on the same license. The commission model is the one variable an agent fully controls, and at this price point it's the difference between building wealth and funding a split.
One simple structure, statewide. The same $499 per closed deal applies to every Florida city, including Keystone.
Built for every Florida agent — including agents working Keystone and the broader Hillsborough County market.
Submit your info — we'll have you onboarded as a 100% commission agent in Keystone, Florida, and earning on your next transaction.
Join Gromadzki Real Estate →