In the 12 months to September 2026, 10 new-build homes sold in CF3 (Cardiff), 2% of all sales, according to HM Land Registry. New detached homes sold for a median £376,500, 2.3% more than existing ones.
Cardiff, covering Llanrumney, Machen and Rudry, Pontprennau and Old St Mellons, Rumney, Tredegar Park and Marshfield, Trowbridge, Marshfield, Michaelstone-y-Fedw.
New homes sold
2% of sales, last 12 months
New-build premium
Detached homes
Resold, vs market
Market +31.2%
Energy bills
65% have solar
Developments
New streets with three or more new-build sales in the last two years. Price per m² uses floor areas from each home's energy certificate.
The premium
Median sold prices over the last two years. New homes are often a different size, so this is a guide rather than a like-for-like comparison.
New £377k · existing £368k
48 new-build sales
New £300k · existing £265k
14 new-build sales
New £300k · existing £220k
26 new-build sales
Resale
Bought new, resold
Local market, same years
Kept pace
Typically held 4 years
Homes in CF3 that Land Registry records as bought new and later resold, against the UK house price index for the same type of home and years. Shared-ownership first sales are left out.
Running costs
Energy bills
Typical 109 m² home
Typical rating
Solar panels
of homes
Heat pumps
of homes
From the energy certificates of 66 recently built homes. Certificate costs use standard assumptions, so compare them rather than budget on them. A typical older D-rated home costs nearer £1,800 a year.
HM Land Registry price paid data, standard sales only, to September 2026. New homes appear once their sale is registered, usually a few weeks after completion.
Over the last two years, new detached homes in CF3 sold for a median £376,500 against £368,000 for existing ones, a difference of +2.3%. New homes are often a different size or spec, so compare price per square metre for a specific plot.
329 homes in CF3 bought new and later resold changed by a median +21.2%, typically after 4 years. The local market moved +31.2% over the same periods, so buyers of new homes generally lost some of the new-build premium.
Recent new-build sales recorded by Land Registry in CF3 include Heol Yr Hydd, Llanrumney, Nant Y Pandy, Llanrumney, Clos Winmill, Old St Mellons, Heol Roberts, Old St Mellons, Clos Grehan, Old St Mellons. New streets appear once the first homes complete.
Compare the asking price per square metre with plots already sold on the development, allow for the new-build premium, and negotiate extras as well as price. Proptel's new-build check does this for one plot for £9.99, with the extras to ask for and a letter for the sales office.
© 2026 Proptel · Property data for buyers