For a full UK postcode and a range of required parameters relating to a particular UK multi-unit development, returns an estimated gross development value (with +/- margin of error) for that property, as well as a total rental value. The only available AVM in the UK that uses market £/sqft data as part of the valuation.
| key | Your API key | Required |
| postcode | A full UK postcode | Required |
| flat_0 | How many 0 bed flats | |
| flat_1 | How many 1 bed flats | |
| flat_2 | How many 2 bed flats | |
| flat_3 | How many 3 bed flats | |
| flat_4 | How many 4 bed flats | |
| terraced_house_2 | How many 2 bed terraced houses | |
| terraced_house_3 | How many 3 bed terraced houses | |
| terraced_house_4 | How many 4 bed terraced houses | |
| terraced_house_5 | How many 5 bed terraced houses | |
| semi-detached_house_2 | How many 2 bed semi-detached houses | |
| semi-detached_house_3 | How many 3 bed semi-detached houses | |
| semi-detached_house_4 | How many 4 bed semi-detached houses | |
| semi-detached_house_5 | How many 5 bed semi-detached houses | |
| detached_house_2 | How many 2 bed detached houses | |
| detached_house_3 | How many 3 bed detached houses | |
| detached_house_4 | How many 4 bed detached houses | |
| detached_house_5 | How many 5 bed detached houses | |
| finish_quality | Interior finish quality (premium, medium or basic) | Required |
| internal_area | Internal area in square feet | Required |
https://api.propertydata.co.uk/development-gdv?key={API_KEY}&postcode=NW6+7YD&flat_2=4&flat_1=1&finish_quality=medium
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Property listings seen on rightmove.co.uk, zoopla.co.uk and onthemarket.com.
The data is updated in near real-time.
This is a real-time market snapshot - the data covers currently listed properties. Once properties are removed from the portal, they are soon removed from this tab.
Duplicates from multiple sources are matched and reconciled as far as possible. Listings with obvious errors, where price or number or bedrooms appear out of range, are discarded.
Averages shown are the interquartile mean, a type of average that is insensitive to outliers while being its own distinct parameter. The 80% range means that 80% of the listed properties fall inside this range.
Property listings seen on rightmove.co.uk, zoopla.co.uk and onthemarket.com.
We use proprietary technology to read the square footage of properties from agent floorplans. Although we cannot determine the square footage for all properties, we can usually get sufficient coverage. Agents are sometimes known to inflate square footage, and this should be borne in mind as a weakness of this data.
The data is updated in near real-time.
This is a real-time market snapshot - the data covers currently listed properties. Once properties are removed from the portal, they are soon removed from this tab.
Duplicates from multiple sources are matched and reconciled as far as possible. Listings with obvious errors, where price or number or bedrooms appear out of range, are discarded.
The average shown is the interquartile mean, a type of average that is insensitive to outliers while being its own distinct parameter. The 80% range means that 80% of the listed properties fall inside this range.
Property "price paid" data provided by the Land Registry.
Once per month when released by the Land Registry, typically towards the end of each calendar month covering up to the end of the previous calendar month.
You can customise the time period using the filter at the top of the view. The default time period is up to 9 months back from today's date. The latest data covers the period up to 2021-09-29, although some sales that took place before this date may still be added in the coming months.
No additional processes are applied to this data.
Averages shown are the interquartile mean, a type of average that is insensitive to outliers while being its own distinct parameter. The 80% range means that 80% of the listed properties fall inside this range.
Property "price paid" data provided by the Land Registry, and Energy Performance Certificate (EPC) data provided by Ministry of Housing, Communities & Local Government.
We match the Land Registry data to EPC data provided by the MCHLG. Due to the fact that not all properties sold have had an EPC and vagaries of addressing in the UK, we are not able to determine the square footage of all properties, but we can usually get sufficient coverage.
The private paid data is updated once per month when released by the Land Registry, typically towards the end of each calendar month covering up to the end of the previous calendar month. The energy performance certificate database is updated monthly.
You can customise the time period using the filter at the top of the view. The default time period is up to 9 months back from today's date. The latest data covers the period up to 2021-09-29, although some sales that took place before this date may still be added in the coming months.
No additional processes are applied to this data.
The average shown is the interquartile mean, a type of average that is insensitive to outliers while being its own distinct parameter. The 80% range means that 80% of the listed properties fall inside this range.
Property listings seen on rightmove.co.uk, zoopla.co.uk and onthemarket.com.
The data is updated in near real-time.
This is a real-time market snapshot - the data covers currently listed properties. Once properties are removed from the portal, they are soon removed from this tab.
Duplicates from multiple sources are matched and reconciled as far as possible. Listings with obvious errors, where price or number or bedrooms appear out of range, are discarded.
The average shown is the interquartile mean, a type of average that is insensitive to outliers while being its own distinct parameter. The 80% range means that 80% of the listed properties fall inside this range.
Room let listings on SpareRoom, the UK's biggest room letting website.
The data is updated in near real-time.
This is a real-time market snapshot - the data covers currently listed properties. Once properties are removed from SpareRoom, they are soon removed from this tab.
Listings with obvious errors, where price or number or bedrooms appear out of range, are discarded.
The average shown is the interquartile mean, a type of average that is insensitive to outliers while being its own distinct parameter. The 80% range means that 80% of the listed properties fall inside this range.
Property listings seen on rightmove.co.uk, zoopla.co.uk and onthemarket.com.
The data is updated in near real-time.
This is a real-time market snapshot - the data covers currently listed properties. Once properties are removed from the portal, they are soon removed from this tab.
Duplicates from multiple sources are matched and reconciled as far as possible. Listings with obvious errors, where price or number or bedrooms appear out of range, are discarded. Yields are calculated by comparing only properties with the same number of bedrooms, e.g. 3-bedroom properties for rent with 3-bedroom properties for sale.
The calculation used is (average_weekly_asking_rent * 52 / average_asking_price), expressed as a percentage. It is a top-line gross yield, meaning no expenses are considered.
The average shown is the interquartile mean, a type of average that is insensitive to outliers while being its own distinct parameter. The 80% range means that 80% of the listed properties fall inside this range.
Property listings seen on rightmove.co.uk, zoopla.co.uk and onthemarket.com.
The data is updated in near real-time.
This is a real-time market snapshot - the data covers currently listed properties. Once properties are removed from Zoopla, Rightmove or Spareroom, they are soon removed from this tab.
Duplicates from multiple sources are matched and reconciled as far as possible. Yields are calculated by comparing only properties with the same number of bedrooms, e.g. 3-bedroom properties for rent with 3-bedroom properties for sale. For the SpareRoom data, hypothetical properties consisting of two to six average double rooms with shared bathrooms are used to derived average rent. For all sources, listings with obvious errors, where price or number or bedrooms appear out of range, are discarded.
The calculation used is (average_weekly_asking_rent * 52 / average_asking_price), expressed as a percentage. It is a top-line gross yield, meaning no expenses are considered.
The average shown is the interquartile mean, a type of average that is insensitive to outliers while being its own distinct parameter. The 80% range means that 80% of the listed properties fall inside this range.
Property "price paid" data provided by the Land Registry.
Once per month when released by the Land Registry, typically towards the end of each calendar month covering up to the end of the previous calendar month.
Zoopla Zed-index
The data covers transactions in the last six years
No additional processes are applied to this data.
The average shown is the interquartile mean, a type of average that is insensitive to outliers while being its own distinct parameter. The 80% range means that 80% of the listed properties fall inside this range.
Property listings seen on rightmove.co.uk, zoopla.co.uk and onthemarket.com.
The listings data is updated in near real-time. The Land Registry data is updated once per month when released, typically towards the end of each calendar month covering up to the end of the previous calendar month.
The price paid data shown goes back to January 2015. The listings data is a real-time market snapshot - the data covers currently listed properties. Once properties are removed from the portal, they are soon removed from this tab.
Duplicates from multiple sources are matched and reconciled as far as possible. Listings with obvious errors, where price or number or bedrooms appear out of range, are discarded.
Average sales per month are for the last 3 finalised months. Turnover is average sales per month divided by total for sale. Inventory is 100 divided by turnover.
Property listings seen on rightmove.co.uk, zoopla.co.uk and onthemarket.com.
The listings data is updated in near real-time. The Land Registry data is updated once per month when released, typically towards the end of each calendar month covering up to the end of the previous calendar month.
This is a real-time market snapshot - the data covers currently listed properties. Once properties are removed from the portal, they are soon removed from this tab.
Duplicates from multiple sources are matched and reconciled as far as possible. Listings with obvious errors, where price or number or bedrooms appear out of range, are discarded.
We receive data on the extent and corporate ownership of all land titles in England & Wales from the Land Registry.
The data is updated once per month when released, typically in the first few days of each calendar month.
This is an ownership snapshot - the data represents ownership as recorded by the Land Registry at the last monthly export.
No additional processes are applied to this data.
The baseline construction cost data comes from PropertyData's own research. The regional variances are sourced from an annual survey carried out by Turner & Townsend.
The baseline construction cost data is checked four times a year. The regional variances are updated annually when the new cost survey data is released, typically around the middle of the year.
We apply the regional variance data sourced from Turner & Townsend to the underlying cost data in a simple way. Data is rounded to the nearest £10/sqft. No additional processes are applied to this data.
We source different expert forecasts Savills, Knight Frank, OBR
The data is updated annually when new forecasts are released, typically towards the beginning of the year.
We calculate a consensus forecast using a simple mean average.
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