Barnsley has pre 1919 terraces in the town and the Dearne, a semi detached belt round the edge, and a council document that puts numbers on an extension.
Barnsley's House Extensions SPD, adopted 28 March 2024, says a single storey rear extension should not exceed 3.5 metres on a terrace or 4 metres on a semi. We build those figures into the extension page, add renovation and garage conversion pages, and a quote tool that filters the odd jobs out. Free live demo, keep your domain, live in 7 days.
The published Valuation Office stock table CTSOP4.1, stock at 31 March 2025, records 115,540 properties in Barnsley. Totalling its build period columns ourselves, 23,040 were built before 1919, which is 19.9%, and 42,840 before 1940. 26.1% went up between 1945 and 1972 and 16.9% between 1973 and 1999.
The council's Housing Strategy 2024 to 2028 states that "around 60% of private sector housing in Barnsley is over 50 years old, while almost 30% (some 22,500 homes) were built before 1919". Census 2021 table TS044 records 45.5% of households in semi detached houses, 23.4% detached, 23.3% terraced and 6.2% in purpose built flats.
Those are two different books of work in one borough. We would write the renovation pages for the older half and the extension and garage conversion pages for the semi detached half, each carrying the jobs you have finished there.
63.6% built before 1919, with 5.1% from 1945 to 1972 (our own totals of the Valuation Office table, 2025). The council's conservation area list includes Barnsley Regent Street, Church Street and Market Hill, Victoria Road and Huddersfield Road.
Full house renovation, loft conversion and structural work on Victorian terraces and villas, much of it inside or beside a conservation area.
21.5% built before 1919 and 24.7% since 2000 (our own totals of the Valuation Office table, 2025). Penistone is one of Barnsley's 18 conservation areas, and the House Extensions SPD names it as a place whose character an extension has to complement.
Stone extensions and renovations where matching the material is the job, plus reworking of the estates built since 2000.
Worsbrough Common is 38.7% built before 1919, and Worsbrough itself is 36.7% built between 1945 and 1972 with 27.2% inter war (our own totals of the Valuation Office table, 2025). Worsbrough is a conservation area.
Two different jobs a mile apart: terrace renovation on one side, single storey rear extensions and garage conversions on post war semis on the other.
Goldthorpe is 29.0% built before 1919 and 30.7% since 2000 (our own totals of the Valuation Office table, 2025). The council's Housing Strategy runs a Goldthorpe Housing Project and a retrofit project on up to 83 pre 1919 terraced properties, funded from Towns Fund money across the three townships.
Contract and retrofit work on pre 1919 terraces, with groundworks and new build alongside it. A different customer from the homeowner, and worth its own page.
27.8% and 30.7% built between 1973 and 1999, with 29.1% and 26.9% from 1945 to 1972 (our own totals of the Valuation Office table, 2025).
The straightforward extension belt: late century semis and detached houses with garages and side space, now being reworked rather than sold.
Barnsley Council adopted a House Extensions and Other Domestic Alterations Supplementary Planning Document on 28 March 2024, and it puts numbers on the work. It states that single storey rear extensions to terraced houses "should not exceed 3.5 metres in projection and where they exceed 3 metres in length the eaves height should not exceed 2.5 metres". On semi detached houses the figure in the same document is 4 metres with the same eaves rule.
On two storey work the SPD states that rear extensions to semi detached houses "should, therefore, generally be designed with a rear projection of less than 3.5 metres and for terraced houses 2.5 metres", and it applies the 45 degree test to the nearest habitable room window of the adjacent dwelling. The council states that the SPD covers houses in conservation areas, the Green Belt and listed buildings too, with more stringent controls.
The separate Residential Amenity and the Siting of Buildings SPD sets out a 25 degree rule for back to back orientations and a 45 degree rule for back to side. Barnsley has 18 conservation areas, including Penistone, Elsecar, Cawthorne, Worsbrough, Darfield and three in the town itself.
A page carrying those figures is a page that answers the first phone call before it happens. We would write it so it explains which jobs need permission, and says that you check the address against the conservation boundary before you quote.
The local field, 16 September 2026
We counted the Google Maps results for builders in Barnsley on 16 September 2026. The sample was 40 listings: 33 had a website and 7 had none. The same list carries five builders merchants, a timber yard, a glazing firm, a scaffolder, a driveway company, a national housebuilder and the council's housing company. Two of the listed sites are a Facebook page and a booking link rather than a site of their own.
That is one dated sample of one search. What we would do with it is give the town centre, Penistone, Worsbrough, the Dearne townships and Mapplewell a page each, carrying your finished work in them.
Three Barnsley firms appeared in the first ten Google local listings we checked for "builders in Barnsley", with sites worth opening. This is the bar a building firm here reaches once it puts money into the site.
Built on WordPress. It carries a page per area, photographs of its own jobs and reviews on the page. Quotes come through a form, and the phone number sits in the header.
Every finished job gets its own portfolio page named for the work and the town, such as garage conversion Barnsley and basement conversion Sheffield, which is a gallery that also earns search traffic.
Built on WordPress. It carries photographs of its own jobs and reviews on the page. It has no page per area. Quotes come through a form, and the phone number sits in the header.
It states its coverage in plain terms, within one hour's drive of Carlton, Barnsley, which sets the customer's expectation before they ring instead of after.
A custom site built by an agency. It carries photographs of its own jobs and reviews on the page. It has no page per area. Quotes come through a form, and the phone number sits in the header.
The landline sits in the header on every page and the copy separates domestic from commercial work at the top, so the wrong enquiry filters itself out early.
All three keep the phone number in the header, all three carry reviews on the page, and one runs a page per area. Each one opened and checked 16 September 2026.
"builders in Barnsley"
260 searches a month (OpenSEO keyword data, September 2026)
The town page. It names the rounds you cover and shows the work you have finished in each.
"builder Barnsley"
260 searches a month (OpenSEO keyword data, September 2026)
The singular spelling of the same demand, answered by the same page.
"loft conversion Barnsley"
30 searches a month (OpenSEO keyword data, September 2026)
A loft page pointed at the town centre and Worsbrough Common terraces, with the stair and head height shown.
"building contractors Barnsley"
10 searches a month (OpenSEO keyword data, September 2026)
The phrase a landlord, an agent or the council's contractor list uses. We would give contract work its own page.
"garage conversion Barnsley"
no recorded monthly volume (OpenSEO keyword data, September 2026)
The tool returned a row with no volume. We would still build the page for Mapplewell, Darton and Hoyland and let the town page carry it.
"extension builder Barnsley"
no recorded monthly volume (OpenSEO keyword data, September 2026)
No volume came back for this phrase either. The extension page earns its place from the SPD figures it can answer, not from this row.
Two of the ten listings on page one for "builders in Barnsley" carry Barnsley in the web address, and one of the ten links to a Facebook page rather than a site of its own (OpenSEO local search results, read 16 September 2026).
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Barnsley publishes the figures. The council's House Extensions SPD, adopted 28 March 2024, says single storey rear extensions to terraces should not exceed 3.5 metres and semis 4 metres, with eaves at 2.5 metres once the extension passes 3 metres. We would put that on the extension page, with the date it was adopted.
The council's Housing Strategy 2024 to 2028 says almost 30% of private sector housing predates 1919, about 22,500 homes. Census 2021 records 45.5% of households in semi detached houses. We would build renovation pages for the older half and extension pages for the semi detached half, each with its own photographs.
Less than the number suggests. In our sample of 16 September 2026, 7 of the 40 had no website, and the list carries five builders merchants, a scaffolder, a glazier, a timber yard and a national housebuilder. That is one dated sample of one search, and we would answer it with a page per district.
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We build your building site first, put it on a real address and send you the link. No deposit, no contract to read, nothing monthly at the sale.
99 out of 100 on Google's mobile speed test, measured on 15 September 2026. Run the test yourself.
The tool on this page is set to the driveways version so you can play with it. Yours comes with extensions, loft conversions, renovations and groundwork on the buttons.
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