How Property Reports Work: What Data Sources Are Used
A comprehensive property report synthesises data from over 40 different sources — from the Environment Agency's flood models to the British Geological Survey's ground stability assessments. At HouseCheckup, our £24.99 reports aggregate these diverse data streams into a single, clear assessment, compared to the £250-£450 that traditional conveyancing search packs charge for similar (and often identical) underlying data. This guide explains what goes into a modern property report and why it matters.
Why Property Reports Exist
Buying a property is the largest financial decision most people make, yet it remains remarkably opaque. The property itself might look perfect during a viewing, but beneath the surface lie risks that are invisible to the naked eye: flood zones, subsidence-prone clay, radon gas, planning applications, contaminated land, and much more.
Property reports exist to make the invisible visible. By aggregating data from authoritative sources, they give buyers the information they need to make informed decisions — or to negotiate a fair price when risks are identified.
The Key Data Sources
Environment Agency
The Environment Agency provides several critical datasets:
- Flood Zone maps: River and sea flooding probability (Zones 1, 2, 3a, 3b)
- Surface water flood risk: Pluvial flooding models showing where heavy rain could cause flooding
- Reservoir flood risk: Modelled areas at risk if a reservoir were to fail
- Historical flood outlines: Records of actual flooding events
- Flood defences: Location, type, and design standard of flood protection infrastructure
This data underpins the flood risk section of any property report and is essential for properties anywhere in England.
British Geological Survey (BGS)
The BGS provides ground condition data including:
- Geology maps: Bedrock and superficial deposit types
- Shrink-swell clay data: Risk of clay-related subsidence
- Ground dissolution: Risk from soluble rocks (limestone, chalk, gypsum)
- Landslide risk: Areas prone to landslips
- Compressible ground: Risk of settlement on soft deposits
- Running sands: Risk of ground instability from water-bearing sands
- Mining data: Records of historical mining activity
UK Radon Data
Public Health England (now UKHSA) provides the definitive radon risk map for the UK, showing the probability that any building in an area will have radon levels above the Action Level of 200 Bq/m³. Property reports use this data to assess whether radon testing or remediation might be needed.
Land Registry
HM Land Registry provides:
- Title information: Ownership details, registered charges, and restrictions
- Price paid data: Historical transaction prices for properties in England and Wales
- Flood risk indicator: Whether a title is flagged for flood risk
Energy Performance Certificates (EPCs)
The EPC register contains energy ratings for most UK properties, including:
- Current energy efficiency rating (A-G)
- Environmental impact rating
- Estimated energy costs
- Recommended improvements and potential rating after improvements
- Property details (construction type, heating, insulation)
Local Authority Data
Local authorities hold vast amounts of property-relevant data:
- Planning history: Applications, decisions, and conditions for the property and surrounding area
- Building control records: Building Regulations applications and completion certificates
- Conservation areas: Designated areas with additional planning restrictions
- Tree Preservation Orders: Protected trees on or near the property
- Smoke control zones: Areas where certain fuels cannot be burned
- Air Quality Management Areas: Zones with identified air quality problems
- Council tax bands: Current banding and valuation
Coal Authority
For properties in coalfield areas (covering approximately 24% of England), the Coal Authority provides data on:
- Past, present, and future coal mining activity
- Mine entries (shafts and adits)
- Coal mining subsidence claims
- Surface hazards related to mining
Ordnance Survey
OS data provides the mapping foundation for property reports:
- Precise property boundaries and locations
- Surrounding land use and topography
- Distance calculations to infrastructure and risk sources
Office for National Statistics (ONS)
ONS provides demographic and area-level data:
- Crime statistics by local authority
- Deprivation indices
- Population demographics
- Economic activity indicators
How Data Is Combined
Raw data from individual sources has limited value on its own. The power of a property report lies in combining multiple data points to create a comprehensive picture:
Risk Aggregation
A property might be in Flood Zone 1 (low river flood risk) but have high surface water flood risk, sit on shrink-swell clay, and be near a former mine shaft. Each risk alone might be manageable, but together they significantly affect the property's risk profile and insurance costs.
Cross-Referencing
Good property reports cross-reference data to identify anomalies. For example, an EPC showing cavity wall insulation combined with BGS data indicating shrink-swell clay might suggest the cavity walls could be affected by ground movement — something neither dataset reveals alone.
Contextualisation
Raw data needs context to be useful. A radon potential of 5-10% means little to most people. A good report explains that this means testing is recommended and mitigation may be needed — and estimates the cost.
Traditional Searches vs Modern Reports
The traditional conveyancing search process involves ordering individual searches from different providers:
| Search Type | Typical Cost | Provider |
|---|---|---|
| Local Authority Search | £80-£300 | Local council |
| Environmental Search | £35-£80 | Groundsure, Landmark |
| Water & Drainage | £40-£70 | Water company |
| Mining Search | £40-£60 | Coal Authority |
| Chancel Repair | £20-£30 | Various |
| Total | £215-£540 |
These searches are ordered by your solicitor during conveyancing and typically take 2-6 weeks to complete. They provide detailed, legally relied-upon information, and they remain necessary for mortgage lenders.
Modern property reports like HouseCheckup aggregate much of the same underlying data into a single report for a fraction of the cost. While they don't replace formal conveyancing searches (which your solicitor will still order), they provide early-stage intelligence that helps you decide whether to proceed with a purchase before committing to survey and legal costs.
What Makes a Good Property Report
Not all property reports are equal. Look for:
- Breadth of data: Coverage across flood, ground, environmental, planning, energy, and area data
- Clear presentation: Risk ratings, maps, and plain-English explanations — not just raw data dumps
- Actionable insight: Recommendations on what to do about identified risks
- Up-to-date sources: Data currency matters — flood maps and planning databases are regularly updated
- Value for money: Compare what's included at what price point
Get the Data That Matters
A HouseCheckup report for £24.99 (Complete tier) draws on authoritative data sources to deliver a comprehensive property assessment covering flood risk, subsidence, radon, planning history, EPC data, environmental factors, and local area information. Whether you're at the viewing stage, shortlisting properties, or preparing for an offer, having the right data at the right price helps you make confident, informed decisions — saving potentially thousands in avoided problems or smarter negotiations.
Buying in this area? Check the exact property.
Area data is the starting point — not a verdict on one house. The £24.99 Complete report runs 15+ checks on the specific address you're considering — flood, subsidence, coal mining, radon, crime, sold-price history and more — each from an official source, with a plain-English read on every one.
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