Seven filters. Zero exceptions.
Every listing QuantField screens must pass all seven criteria. The buy box exists because disciplined filtering is the first defence against weak-fit decisions — whether you are an agent or a buyer.
Most property decisions are made without a framework.
The default approach — browsing listings, reading marketing materials, asking agents — produces decisions shaped by noise. A defined buy box replaces that noise with a fixed filter set that applies every time, consistently, regardless of how good a pitch sounds or how urgently a listing is presented.
For buyers
The buy box gives you a way to evaluate any listing independently before spending time, energy, or emotion on it. If it fails even one filter, you know early.
For agents
A personal buy box helps you decide which listings to pursue before committing time, preparation, and marketing spend to a weak fit.
For self-directed subscribers
The buy box is the framework that anchors every copilot query. It helps you ask better questions and understand what you are actually filtering for.
For everyone
The buy box does not guarantee the right outcome. It improves the quality of the first filter — and that is where most bad decisions begin.
What QuantField filters on — and why.
Price
S$750K – S$1.2M
The range that balances yield potential, liquidity, and financing accessibility. Below S$750K, unit sizes and locations become constrained. Above S$1.2M, yield compression makes the numbers hard without significant appreciation assumptions.
Unit size
500 – 750 sqft
The most liquid band for Singapore rental demand. Smaller than 500sqft creates tenant-pool risk. Larger than 750sqft pushes rent expectations into territory where yield suffers — particularly for investment-grade resale stock.
MRT distance
≤ 800m walking
Singapore tenant expectation. Beyond 800m, rental premiums fall materially and the addressable tenant pool narrows. QuantField uses walking distance, not straight-line.
Net yield
BUY ≥ 4.0% · HOLD 3.5–3.99%
Calculated after property tax, maintenance fees, vacancy allowance (0.5 months), and letting fee (1 month). Gross yield is what agents quote. Net yield is what determines whether the asset works. The minimum screen threshold is 3.2%.
District
D09, D10, D11, D14, D15
City fringe. Close enough to the CBD to command a rental premium. Far enough from Core Central to find yield. D14 and D15 currently offer the most consistent yield-to-entry balance. D09 and D11 suit buyers prioritising capital position over immediate yield.
Tenure
Freehold preferred · 99yr LH acceptable
Freehold provides superior exit flexibility and long-term optionality. 99-year leasehold is acceptable when the yield premium compensates — typically at least 0.5 percentage points above an equivalent freehold unit. 999-year leasehold is treated as freehold for practical purposes.
Transaction type
Resale only
No new launches. The developer premium embedded in launch pricing destroys yield. Resale gives you real transaction comps from URA caveats, removes the marketing layer, and allows independent financial analysis based on actual market data.
Gross yield is what agents quote. Net yield is what matters.
The gap between gross and net yield is typically 1.2 to 1.8 percentage points. On a S$1M property, that represents S$12,000 to S$18,000 per year — the difference between a working investment and one that quietly underperforms.
Run a yield calculation →Example: S$998,000 · 732 sqft · S$4,500/mth rent
Gross yield: 5.41%. Net yield: 4.04%. Gap: 1.37 percentage points.
Apply the framework to a real listing.
Submit any listing and QuantField will run it through the buy-box criteria, calculate net yield, and return a structured verdict.