Built for decisions. Not listings.
Roncasa is a real estate practice built around one belief: that the tools most agents use aren't precise enough to actually help someone decide. So Ronnie built his own. And this site is what that looks like now.
3,500+
Properties in the database
5+
Years building this platform
3
Live data sources · URA · HDB · DataGov
1
Person running all of it
Principal Agent
Ronnie Tan
CEA Licensed · PropNex
Loves homes — the spaces, the ID, the way a floor plan tells you how a family actually lives. Separately loves building: calculators, systems, tools, websites. Property became the place where both instincts landed. What started as an Excel spreadsheet because the company one wasn't enough has become a live data platform tracking thousands of properties across Singapore.
2020 · R062957C
Partner
Robin Tan
CEA Licensed · PropNex
A real estate agent who loves the game — both on the property market and on the field. Sport taught him the value of teamwork and hustle, qualities he brings to every client interaction. Away from work, he recharges with Robert. His most loyal, and most high-maintenance, companion.
2024 · R069454F
Robert
Chief Morale Officer
Has attended every internal meeting since 2022. Has never given bad advice. Unclear if he understands CPF, but his read on market sentiment is generally accurate. Available for viewings. Tends to fall asleep during floor plan discussions.
2022 · Pug
01
The tools were never wrong. Just not enough.
When Ronnie started, the advice was consistent: don't reinvent the wheel. Use the company calculator. There's a system for that. He understood the logic. He just didn't agree with the output.
The tools were built for speed — not for the kind of clarity that shows assumptions, surfaces trade-offs, and holds up when a client asks a hard question.
First instinct: I think I can build something better.
02
Built it anyway. On crutches.
In 2021, a serious accident put Ronnie in hospital, then in a wheelchair for months. He went back to showflats on crutches before he could walk properly again.
The build didn't stop. The first version of the site went live that year — self-coded calculator, newsletter, the whole thing running from a laptop in recovery. It wasn't stubbornness. It was the clearest test of whether this actually mattered.
It did.
03
Patterns in the real market.
The years that followed were an education. Partnerships, transactions, live deals across resale, rental, new launch, industrial, commercial.
One pattern kept appearing: most decisions were made with incomplete context. Not because people were careless — but because the tools they were given didn't show enough.
That shifted everything. From answering questions, to asking better ones.
04
Now it's a live system.
What started in Excel is now a platform pulling live data from URA, HDB, and DataGov. Over 3,500 properties tracked. Calculators built from scratch. Every answer with assumptions shown.
Robin came on board in 2025. The ads started running. The rebuild became intentional. Still independently run. Still one person writing every line of it.
Not a content site. A decision system.
"When someone asks if a unit makes sense, I want to pull up my own website — not to sell something, but because the numbers either hold up or they don't."
— Ronnie Tan, Principal Agent · CEA R062957C
宀
Roof radical
家
Jiā · Home
Brand story
One roof. One character. One promise.
“Mi casa es su casa” was never a throwaway line for me — it’s the closest thing Roncasa has to a mission statement.
My Chinese name is 家豪 (Jiā Hào). The first character, 家, means home — built from 宀, a roof, over everything that roof is meant to protect. When I drew the Roncasa mark, I put a roof over it for the same reason: a home isn’t a listing, it’s protection, and usually someone’s biggest asset. Ron + casa — that’s where the name comes from.
The philosophy underneath it is simple: I treat every transaction as if it were my own. My home is your home, and your future gets handled with the same care my family’s would.
That’s also why this site exists. Most property sites hand you a listing and a script. Roncasa runs the actual data — URA, HDB, DataGov, live — so every number you see has been pulled apart and checked, not just quoted. Not a headline PSF. The full transaction history, the real trend, an honest read on whether a unit makes sense for you. That’s the deep dive. That’s the only kind of “home” worth promising.
— Ronnie Tan, Principal Agent