Underwrite any UK deal in one API call.
Yield, cash flow, refurb upside, and exit liquidity — for any UK address, in real time. Propalt gives investment platforms and sourcing teams the data layer behind sharper deals and faster decisions.
The Problem We Solve
Property investing rewards whoever underwrites fastest with the best data. But most investors still triangulate yield from a single rental comp on a portal, eyeball refurb cost from a builder’s gut feel, and guess at exit liquidity from "what the last one sold for." The genuinely under-priced deals are gone before the spreadsheet finishes loading.
The Propalt API gives investors and sourcing platforms full-address yield estimates with confidence bands, EPC uplift opportunities and refurb cost ranges, capital growth trends at postcode level, landlord ownership and portfolio intelligence, and exit-liquidity signals — in one call, refreshed daily. Underwrite every address in your pipeline before competitors find it.
What You Can Build
Six common patterns built on Propalt by investment platform and sourcing engineering teams today.
Instant deal underwriting
Pull yield, cash flow, refurb upside, and exit comparables for any UK address in a single API call — with get-house-price-index capital-growth context layered on. Replace 90-minute spreadsheet underwrites with sub-second decisions.
Off-market BTL and listed-stock sourcing
Score every listed property against your buy-box (postcode, yield floor, EPC band, tenure) and surface only the deals worth analysing — plus surface off-market BTL stock via audience-letting-property and live listings via get-listings.
EPC uplift and refurb modelling
Identify properties where moving from EPC D/E to C unlocks rent premium and green-mortgage eligibility. Quantify the spend, the uplift, and the payback.
Portfolio dashboards
Track every property in an investor's portfolio against current market value, current rent benchmark, EPC obsolescence risk, and lease metrics. Surface the underperformers automatically.
Off-market landlord targeting
Identify portfolio landlords by postcode, holding period, and ownership type. Surface the ones likely to sell — before they list.
Section 24, MEES, and CGT modelling
Append the property-level data needed for accurate landlord tax modelling and 2028 MEES compliance planning. No more manual pulls from the Land Registry, EPC Register, and Companies House.
Key Endpoints for Property Investors
These 10 endpoints cover > 90% of investor and sourcing workloads. Browse the full 36-endpoint directory for everything else.
Example API Response
A full BTL underwrite — yield, refurb upside, exit liquidity, and current owner context returned in one call.
{ "property_id": "prop_7c2a91", "uprn": "100023456789", "address": "27 Mowbray Road, Manchester M14 5BS", "asking_price": 168000, "tenure": "Freehold", "property_type": "Terraced", "bedrooms": 3, "floor_area_sqm": 89, "valuation": { "estimate": 174000, "range": [166000, 182000], "confidence": "high", "below_market_pct": 0.034, "comparables_count": 14 }, "rental": { "estimate_pcm": 1100, "range_pcm": [1040, 1180], "yield_gross": 0.0786, "demand_index": "high", "void_estimate_weeks": 2.1 }, "refurb_upside": { "epc_current": "E", "epc_score_current": 48, "epc_uplift_target": "C", "cost_estimate": [5800, 8200], "post_refurb_rent_pcm": 1280, "rent_uplift_pct": 0.164, "mees_2028_compliant_after_refurb": "true" }, "exit_liquidity": { "avg_days_to_sstc": 38, "asking_to_sold_ratio": 0.97, "12mo_price_trend": "+4.2%", "comparable_sales_last_12mo": 22 }, "current_owner": { "type": "individual", "held_since": "2009-11-04", "portfolio_size_estimate": 1, "propensity_to_sell": 0.62 } }
Every UK deal. One API call. Sharper decisions.
Free tier · 500 credits / month · No credit card.