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Where new housing actually gets built

Price Paid Data flags every sale as a new dwelling or not, so the share of sales that are new builds can be measured for every postcode district back to 1995. This is where housing was built and sold — not where permission was granted, which is a different and much larger number.

Highest share of new dwellings

District	Town	Sales	New dwellings	Share
E22	LONDON	315	312	99%
N1C	LONDON	1,040	828	79.6%
E20	LONDON	2,300	1,706	74.2%
B4	BIRMINGHAM	1,017	721	70.9%
WC2A	LONDON	404	278	68.8%
WC2R	LONDON	569	343	60.3%
L1	LIVERPOOL	8,856	4,872	55%
EC3R	LONDON	418	227	54.3%
B2	BIRMINGHAM	739	378	51.2%
EC3A	LONDON	203	104	51.2%
L2	LIVERPOOL	2,933	1,490	50.8%
M15	MANCHESTER	15,750	7,922	50.3%
M4	MANCHESTER	14,879	7,397	49.7%
B1	BIRMINGHAM	9,841	4,867	49.5%
M50	SALFORD	7,229	3,526	48.8%
MK10	MILTON KEYNES	13,394	6,393	47.7%
M3	SALFORD	17,610	7,801	44.3%
M5	SALFORD	14,173	6,064	42.8%
E16	LONDON	24,745	10,484	42.4%
L3	LIVERPOOL	13,464	5,696	42.3%
B5	BIRMINGHAM	6,953	2,936	42.2%
E14	LONDON	58,903	24,857	42.2%
S1	SHEFFIELD	5,258	2,194	41.7%
EC2A	LONDON	1,959	814	41.6%
DA10	SWANSCOMBE	6,005	2,437	40.6%
BD1	BRADFORD	5,253	2,128	40.5%
EC1A	LONDON	1,550	614	39.6%
EC1V	LONDON	7,648	3,016	39.4%
S3	SHEFFIELD	7,373	2,882	39.1%
CB2	CAMBRIDGE	8,898	3,433	38.6%
B3	BIRMINGHAM	3,442	1,320	38.3%
M1	MANCHESTER	12,832	4,795	37.4%
SE10	LONDON	21,728	7,888	36.3%
MK9	MILTON KEYNES	4,227	1,531	36.2%
CF10	CARDIFF	13,255	4,715	35.6%
NE13	NEWCASTLE UPON TYNE	12,987	4,519	34.8%
M17	MANCHESTER	547	190	34.7%
BS1	BRISTOL	10,351	3,496	33.8%
SN25	SWINDON	31,954	10,523	32.9%
LS1	LEEDS	4,618	1,516	32.8%
NE27	NEWCASTLE UPON TYNE	8,925	2,899	32.5%
EC3N	LONDON	490	158	32.2%
OX25	BICESTER	6,114	1,956	32%
NE1	NEWCASTLE UPON TYNE	6,613	2,054	31.1%
EC4V	LONDON	850	261	30.7%
LS2	LEEDS	4,257	1,309	30.7%
SN26	SWINDON	1,130	342	30.3%
CV33	LEAMINGTON SPA	4,533	1,362	30%
TS22	BILLINGHAM	6,853	2,046	29.9%
SE1	LONDON	38,223	11,192	29.3%
EC1Y	LONDON	1,786	522	29.2%
SW1E	LONDON	848	248	29.2%
EC4A	LONDON	644	187	29%
NG1	NOTTINGHAM	7,656	2,217	29%
E1	LONDON	24,617	7,079	28.8%
SE17	LONDON	9,187	2,647	28.8%
TF6	TELFORD	2,687	762	28.4%
L5	LIVERPOOL	5,931	1,678	28.3%
SW1H	LONDON	1,056	298	28.2%
DL2	DARLINGTON	11,361	3,173	27.9%
B15	BIRMINGHAM	8,650	2,403	27.8%
LE1	LEICESTER	5,033	1,401	27.8%
MK4	MILTON KEYNES	16,594	4,590	27.7%
NW9	LONDON	26,890	7,455	27.7%
SW8	LONDON	18,886	5,204	27.6%
E3	LONDON	25,196	6,849	27.2%
BS24	WESTON-SUPER-MARE	16,962	4,604	27.1%
BS29	BANWELL	2,041	553	27.1%
TW8	BRENTFORD	12,126	3,283	27.1%
PE7	PETERBOROUGH	33,217	8,981	27%
SG16	HENLOW	4,073	1,091	26.8%
SE28	LONDON	13,665	3,642	26.7%
CM17	HARLOW	17,948	4,773	26.6%
HP18	AYLESBURY	10,647	2,820	26.5%
W1S	LONDON	658	174	26.4%
SE8	LONDON	11,875	3,119	26.3%
SP11	ANDOVER	15,982	4,189	26.2%
B16	BIRMINGHAM	11,579	3,027	26.1%
HU7	HULL	22,388	5,834	26.1%
HU1	HULL	2,851	738	25.9%
NN18	CORBY	19,595	5,015	25.6%
L26	LIVERPOOL	7,355	1,879	25.5%
CV23	RUGBY	14,884	3,775	25.4%
TS17	STOCKTON-ON-TEES	28,556	7,197	25.2%
YO1	YORK	4,978	1,256	25.2%
YO51	YORK	4,460	1,121	25.1%
MK17	MILTON KEYNES	13,144	3,267	24.9%
SP9	TIDWORTH	2,721	677	24.9%
SW1P	LONDON	8,562	2,121	24.8%
ME19	WEST MALLING	15,191	3,747	24.7%
B12	BIRMINGHAM	5,547	1,367	24.6%
SR1	SUNDERLAND	2,358	579	24.6%
TF4	TELFORD	12,716	3,133	24.6%
EC4Y	LONDON	266	65	24.4%
DE65	DERBY	15,537	3,768	24.3%
MK8	MILTON KEYNES	9,945	2,419	24.3%
CB23	CAMBRIDGE	20,463	4,961	24.2%
TN25	ASHFORD	11,019	2,658	24.1%
NP10	NEWPORT	14,917	3,586	24%
L34	PRESCOT	7,449	1,784	23.9%
L33	LIVERPOOL	7,160	1,698	23.7%
TS28	WINGATE	3,067	723	23.6%
W1T	LONDON	2,775	656	23.6%
EC1M	LONDON	1,797	423	23.5%
L24	LIVERPOOL	5,338	1,239	23.2%
DA9	GREENHITHE	11,373	2,627	23.1%
DL9	CATTERICK GARRISON	5,038	1,159	23%
HP22	AYLESBURY	17,381	3,993	23%
TF11	SHIFNAL	6,088	1,402	23%
E1W	LONDON	11,082	2,538	22.9%
NR18	WYMONDHAM	13,078	2,995	22.9%
SO14	SOUTHAMPTON	15,208	3,477	22.9%
WC1X	LONDON	2,483	569	22.9%
EX5	EXETER	13,229	3,003	22.7%
CV34	WARWICK	23,612	5,298	22.4%
TS8	MIDDLESBROUGH	11,540	2,590	22.4%
BS2	BRISTOL	8,407	1,872	22.3%
CT18	FOLKESTONE	9,796	2,180	22.3%
CW5	NANTWICH	20,693	4,610	22.3%
NN17	CORBY	16,987	3,768	22.2%

Lowest — where almost nothing new is sold

District	Town	Sales	Share new
LL25	DOLWYDDELAN	278	0%
LL51	GARNDOLBENMAEN	250	0%
WC1B	LONDON	668	0%
DA18	ERITH	841	0.1%
B10	BIRMINGHAM	5,508	0.2%
CF43	FERNDALE	5,597	0.2%
TA17	HINTON ST GEORGE	428	0.2%
LL47	TALSARNAU	344	0.3%
LA17	KIRKBY-IN-FURNESS	538	0.4%
LL24	BETWS-Y-COED	1,035	0.4%
NP24	NEW TREDEGAR	1,961	0.4%
LL41	BLAENAU FFESTINIOG	3,607	0.5%
SA20	LLANDOVERY	1,369	0.5%
SY25	TREGARON	1,736	0.5%
CF41	PENTRE	5,008	0.6%
IG4	ILFORD	3,323	0.6%
LD4	LLANGAMMARCH WELLS	342	0.6%
B44	BIRMINGHAM	15,676	0.7%
MK1	MILTON KEYNES	436	0.7%
SA35	LLANFYRNACH	286	0.7%
B25	BIRMINGHAM	6,636	0.8%
CA23	CLEATOR	940	0.9%
CM19	HARLOW	9,264	0.9%
TS1	MIDDLESBROUGH	12,153	0.9%
LL37	LLWYNGWRIL	418	1%
LL68	AMLWCH	2,783	1%
BN42	BRIGHTON	5,175	1.1%
CA9	ALSTON	1,131	1.1%
LL48	PENRHYNDEUDRAETH	1,133	1.1%
NP13	ABERTILLERY	8,523	1.1%
SA40	LLANYBYDDER	1,167	1.1%
SW3	LONDON	17,368	1.1%
B6	BIRMINGHAM	4,135	1.2%
CA24	MOOR ROW	676	1.2%
DA16	WELLING	17,046	1.2%
LL38	FAIRBOURNE	642	1.2%
TA15	MONTACUTE	344	1.2%
TN36	WINCHELSEA	1,627	1.2%
B21	BIRMINGHAM	8,724	1.3%
CF42	TREORCHY	6,535	1.3%

Reading this honestly

A district at 99% new is usually a district that did not exist before — E20 is the Olympic Park, N1C is King's Cross. That is a genuine signal, but it means the share is high because the denominator is small and recent, not because building outpaced an established market.

Districts with fewer than 200 recorded sales are left out entirely, because a share computed on a handful of transactions is noise.