Case study  /  Warwickshire

Two homes inside a farm store.

A post-war block and sheet store on a Warwickshire farmstead, out of farm use for 25 years. We had its lawful use certified and planned its change of use to two three-bedroom homes inside the frame. Permission was granted in April 2026.

Visualisation of the farm store as two homes, timber-boarded under one steep standing-seam roofVisualisation of the farm store as two homes, timber-boarded under one steep standing-seam roof

A visualisation of the approved scheme from the north corner, made in 2026 from our own model of the approved design; not a photograph. The timber and the planting are illustrative: the approved drawings name no material, and the approved landscape plan shows planted gardens inside a new hedge.

The facts

Change of use from storage to homes, Warwickshire.

In a change of use, the use you start from sets the tests. Applied for as B8 storage, this store drew a request for six months' marketing, yet for 25 years it had held a household's mowers, bikes and boats. That use had to be proved, not assumed.

The project

What was approved.

2three-bed homes
Location
A farmstead in open countryside, Warwickshire
Use
From domestic storage to two homes
Our scope
Design, the planning application, the lawful use certificate and the consultant team
Status
Granted 13 April 2026; not built by October 2026

Full planning permission granted 13 April 2026 for the conversion of an ancillary domestic storage building to two dwellings; certificate of lawful existing use granted 3 April 2026. Both are on the district council's public register. 90.8 sqm per home, from our approved plans.

The brief

Homes from a building already there.

Turn a plain store on a farmstead into homes, without building anything new: no extension, no new footprint, the existing frame kept.

The building was sound and weathertight, so the question was never structural. It was which use the planning system would start from: a business store, or a household's.

Homes
Two three-bedroom, single-storey, handed
Each
Kitchen, dining and living, three bedrooms, en suite
The site

A store among farm buildings.

Building
Concrete portal frame, block walls, corrugated sheet roof
Age
Built between the 1950s and the early 1970s
Setting
An established farmstead ringed by mature trees
Policy
Open countryside; not Green Belt, no conservation area
Next door
A former farmyard: noise and odour assessed

From the structural inspection and our design statement.

The timeline

Lodged 2024, granted 2026.

Jan 2024
Concept design issued
Jun 2024
Lodged as B8 to C3; marketing asked for
Sep 2024
Application made valid
Oct 2024
Highways objection; access redrawn in two days
2024 to 2025
Access, fire route, bats and biodiversity settled
Nov 2025
Lawful use certificate applied for
Mar 2026
Planning balance set out in our statement
Apr 2026
Certificate on the 3rd, permission on the 13th

Dates from the council's notices and our issue record.

The building

Same frame, same footprint, two homes.

Everything happens inside the existing building. The concrete frame and the long gabled form stay; the walls take vertical boarding under a standing-seam metal roof, and the new rooms open onto terraces cut into the volume.

As it stood

Block walls under a sheet roof.

The long side of the store as surveyed: concrete portal frames, block walls to the eaves, three small windows and a corrugated roof. A structural engineer found it sound, weathertight and capable of conversion.

Existing elevation, 2024. Not to scale.

The elevations

Boarded walls, a metal roof.

The front and one gable as approved: vertical boarding on the walls and vertical seams on the roof, porches and terraces recessed into the long side, slatted screens beside the glazing. The gable keeps the store's simple outline.

Approved elevations. Not to scale. Zoom to read them.

The plans

Two handed homes, back to back.

A party wall down the middle. In each home the kitchen, dining and living room run across one side; three bedrooms, a bathroom and an en suite sit on the other. 90.8 sqm each, all within the old walls.

Approved plans. Not to scale. Zoom to read them.

The plot

Gardens inside a new hedge.

The homes keep the store's footprint. Gardens wrap the building inside a new hedge, with ten new trees, parking for four, a car charger for each home, and bin and cycle stores; the grassland beyond is kept.

Approved site plan, cropped. Not to scale. Zoom to read it.

What the council decided

Its use certified, then granted.

Permission, 13 April 2026.

Ten days after certifying the store's lawful use as ancillary domestic storage, the council granted full permission to convert it into two homes, with conditions on ecology, drainage, lighting and the access.

Change of use? Ask us
Closer visualisation of the boarded garden side, with timber fins, slatted screens and a stone terraceCloser visualisation of the boarded garden side, with timber fins, slatted screens and a stone terrace

The highway authority withdrew its objection once the junction with the lane was drawn at five metres wide for the first seven and a half metres. The new gardens and a strip of enhanced grassland were set to raise the plot's habitat value by about 38 per cent, with new hedgerow on top; the ten new trees were not even counted.

The full story

The store is a plain single-storey building of concrete portal frames, block walls and a corrugated sheet roof, put up on a working farmstead some time between the 1950s and the early 1970s. By the time we were appointed it had been out of farm use for about 22 years and held the household's lawnmowers, bicycles, rowing boats, a trailer and furniture. A structural engineer found it in good condition, weathertight and capable of conversion, so the two homes could be planned entirely inside it.

The application went in during June 2024 described as a change of use from use class B8, storage, to C3, homes. The council read that as the possible loss of an employment building and listed eight things it needed before it would validate the application, among them evidence of six months' marketing. The owner set out the store's household use the next day. The other seven items followed over the summer, from a structural survey and a contamination desk study to noise and odour studies, and the application was made valid in September 2024, under three months after the council's letter.

The rest was the usual work of a rural site, done properly. The highway authority objected that the junction with the lane was too narrow. Our drawing widening it to five metres for the first seven and a half metres was dated two days after its letter, and the objection was withdrawn. Building Control asked that a fire engine never have to reverse more than 20 metres, so we drew its route through the farmstead. The landscape officer described the farmstead as "a discreet place within the landscape".

Ecology took longer. The county ecologist asked for the biodiversity figures to count the new gardens as gardens, and for a fresh bat survey, because the 2023 survey had lapsed and a new one could only be done between May and August. The project ecologist set out by letter why the store did not need one: negligible roost potential, and no bats found in a winter check. That letter settled the point without waiting for a new survey season. The revised figures showed a gain of about 38 per cent in habitat value from the new gardens and a strip of enhanced grassland, with new hedgerow on top; the ten new trees were not counted at all.

In November 2025, as part of our planning strategy, we applied for a lawful development certificate for the existing use, supported by sworn declarations, photographs and aerial images from 2010 onwards. The council certified the building's use as ancillary domestic storage on 3 April 2026, and the officer's report on the conversion relied on it: because the building had been in household use for so long, the further contamination assessment a farm building conversion would normally need was not required. On 13 April it granted full permission for the conversion of an ancillary domestic storage building to two dwellings, with fourteen conditions. The description no longer mentioned B8.

The officer's report weighed the scheme in the planning balance. The district was short of a five-year housing land supply, and the report gave significant weight to the two new homes, to the biodiversity gain and to the design, which it called "sensitive and considered" and "a well-designed and attractive conversion". It found both homes comfortably above the national space standard. The only public comment on the application, from a countryside charity, commended the design.

What we did

From a store to a permission.

We designed the homes, ran the application and the lawful use certificate, and coordinated the structural, ecology, landscape, noise, odour and contamination work behind them.

The use

What the building was.

Evidence
Sworn declarations, photographs, aerial images
Period
Domestic storage for 25 years
Certified
3 April 2026

A certificate of lawful existing use.

The design

Inside the frame.

Homes
Two, three bedrooms each
Area
90.8 sqm each, no extension
Form
One gabled volume, terraces cut in
Plot
Gardens in a new hedge, ten trees

The store's footprint, unchanged.

The application

Every request answered.

Access
Junction widened, objection withdrawn
Fire
Engine route drawn
Ecology
Bats, owls, newts, net gain
Granted
13 April 2026

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