Land sourcing
- Ground floor area the plot can gain without an application, square metres
- 212
- Rear extension depth allowed without an application, metres
- 4
- Rear depth under the larger home extension route with prior approval, metres
- 8
Every figure here comes from the figures you enter and the method stated beside it: your house's width and depth, your curtilage, your barn's floorspace and your dwellings. The limits the sheets read against come from the General Permitted Development Order as it stood on the day it was read, cited on each page with the date. This site publishes no constraints map of its own, no rule text as law and no legal opinion: what a particular authority will accept on a particular plot is the authority's answer at prior approval, and the order cited on each guide is the starting point, not the ruling.
Land sourcing, for the person who does it rather than reads about it, is a sequence of readings with money attached: the particulars and the tape at the viewing, the curtilage and the original house measured, the envelope read for what the plot may gain without an application, the barn read against class Q, the constraints found on the council's map and the register (conservation area, article 4, tree preservation order, green belt, grey belt, the net gain position), the land valued against what it can become, and the offer made or not. Most sourcers keep it in a spreadsheet of addresses, a folder of particulars and a browser tab on each authority's constraints map, and the three disagree the week a partner asks which sites are still live. This page sets out land sourcing as the file has to keep it, from the first viewing to the offer, and what it costs to keep the plot as a record rather than a search.
Open the Side extension permitted development: the envelope sheet Free to use. No account, no card, no trial clock.
Read the envelope before the viewing ends
Whether the house is detached, the width of its rear wall, the depth of its side wall, the curtilage around it and the outbuildings already on it: the free side extension permitted development envelope sheet on this site reads the rear depth, the side width, the outbuilding room and the ground floor area the plot may gain without an application, which is the figure the offer is built on before anything is drawn.
Read the barn against class Q and the holding's history
The floorspace, the dwellings proposed, the rear wall an extension could run along and what the holding has already converted under the class: the class Q sheet on this site reads the floorspace per dwelling, the headroom under the caps and the dwellings left, and the record keeps the reading against the building so prior approval is applied for on a figure rather than a hope.
Keep the constraints, the appraisal and the offer against the plot
A plot is its constraints: what the conservation area removes, what the article 4 direction withdraws, where the tree preservation order sits and what the net gain will cost. Curtilo Pro keeps each constraint with the day and the place it was read, the appraisal against the land value and the offer made, against the plot, so the next site in the same authority starts from the file rather than the map.
What a developer asks before running the Land sourcing
How does land sourcing differ from buying a house?
The sourcer buys what the plot can become, not what stands on it, so the reading comes before the price: the envelope, the class Q route, the constraints and the residual value. The guides on this site cover each reading and the sheets work the two that are arithmetic.
Does the envelope reading replace prior approval or a lawful development certificate?
No. The sheets read the order's limits from your figures; whether a particular scheme is permitted is confirmed by the authority at prior approval or through a certificate, which is the application side and belongs to the applicant's own file. The reading tells you what to ask for.
Does Curtilo find sites or map constraints for me?
No. The record is your own file: the plots you read, with the measurements and the constraints you enter from the particulars and the authority's map. It publishes no constraints map and reads none; the guides say where each constraint is found.
Will it hold your site file, beyond the Land sourcing?
Tell us how you read plots today, which authorities you buy in, which routes you use most (class Q, the envelope, the outbuilding) and what goes wrong between the viewing and the offer.