Lock Street, Mountain Ash house prices are built from 83 sales lodged with HM Land Registry, the oldest in 1995 and the most recent on 10 Feb 2026. The median price paid across the whole record is £62,000. Across the 12 years from 2003 to 2015 the median moved +92.3% in cash — but once inflation is taken out, the change in 2026 money is +43.5%.
Median price paid
£62,000
Change in cash, 2003–2015
+92.3%
Change in real terms
+43.5%
HM Land Registry83 salesLatest sale 10 Feb 2026
Section 01
How Lock Street, Mountain Ash prices moved
The chart tracks the median Lock Street, Mountain Ash house price for every year with a recorded sale, from 1995 to 2015. The dashed line restates each year in 2026 money, so the two lines separate exactly as much as inflation has eroded the cash figure.
| Decade | Years with sales | Median paid | In today's money |
|---|---|---|---|
| 1990s | 4 | £30,000 | £66,614 |
| 2000s | 1 | £65,000 | £118,411 |
| 2010s | 1 | £125,000 | £176,250 |
The highest yearly median on record for Lock Street, Mountain Ash is £125,000 in 2015; the lowest is £27,500 in 1998. Across the full 21-year record the cash median has moved from £36,975 to £125,000.
In 2026 money that first median is worth £82,102, so the real change over the whole record is +114.7% — about +3.89% a year after inflation. Cash growth and real growth are not the same story, and the gap is the part most price reports leave out.
Over the last decade alone the difference is stark: +92.3% in cash against +43.5% once inflation is removed. A buyer who sold at the end of that decade would have needed the real figure, not the headline one, to know whether they had actually gained.
Section 02
The most recent sales
Every row is a completed sale as lodged with HM Land Registry. The right-hand column restates the price in 2026 money, which is the only fair way to compare a sale from the 1990s with one from last year.
| Address | Sold | Type | Price paid | In today's money |
|---|---|---|---|---|
| 80 | 10 Feb 2026 | Semi-detached | £180,000 | £180,000 |
| 44 | 4 Oct 2024 | Semi-detached | £155,000 | £163,097 |
| 16 | 16 Jul 2024 | Terraced | £135,000 | £142,052 |
| 59 | 28 Jul 2023 | Terraced | £152,500 | £164,770 |
| Cheriton | 30 Jun 2023 | Detached | £260,000 | £280,920 |
| 56 | 21 Oct 2022 | Semi-detached | £140,000 | £162,202 |
| Lock House | 23 Jul 2021 | Detached | £236,000 | £298,172 |
| 11 | 28 Jun 2021 | Terraced | £140,000 | £176,882 |
| Lock House | 20 Nov 2018 | Detached | £172,500 | £229,891 |
| 30 | 2 Nov 2018 | Semi-detached | £115,000 | £153,261 |
| 11 | 7 Sep 2018 | Terraced | £104,995 | £139,927 |
| 42 | 30 Oct 2017 | Semi-detached | £107,500 | £146,308 |
| 66 | 1 Sep 2017 | Semi-detached | £82,500 | £112,283 |
| 19 | 31 Mar 2017 | Terraced | £95,000 | £129,295 |
| 49 | 2 Mar 2017 | Semi-detached | £110,000 | £149,710 |
| 29 | 31 Oct 2016 | Semi-detached | £92,000 | £128,436 |
| 59 | 26 Aug 2016 | Terraced | £127,000 | £177,297 |
| 12 | 20 Jan 2016 | Terraced | £129,000 | £180,089 |
| Lock House | 8 Jul 2015 | Detached | £157,500 | £222,075 |
| 21 | 8 Jul 2015 | Terraced | £125,000 | £176,250 |
| Highcroft | 8 May 2015 | Detached | £150,000 | £211,500 |
| 12 | 30 Apr 2015 | Semi-detached | £60,000 | £84,600 |
| 41 | 17 Apr 2015 | Semi-detached | £115,000 | £162,150 |
| 25 | 18 Dec 2014 | Semi-detached | £98,000 | £140,570 |
| 65 | 18 Jul 2014 | Terraced | £81,500 | £116,902 |
Section 03
Homes that sold twice
These addresses appear in the register more than once, so the same bricks are being priced twice. That makes them the strongest evidence of what actually happened to Lock Street, Mountain Ash values — no mix of property types can flatter the number.
| Address | First recorded sale | Most recent sale | Cash a year | Real a year |
|---|---|---|---|---|
| 16 Lock Street | £30,000 (1999) | £135,000 (2024) | +6.2% | +3.4% |
| 59 Lock Street | £75,000 (2007) | £152,500 (2023) | +4.5% | +1.5% |
| 56 Lock Street | £42,000 (1995) | £140,000 (2022) | +4.6% | +2.1% |
| LOCK HOUSE Lock Street | £157,500 (2015) | £236,000 (2021) | +7.0% | +5.0% |
| 11 Lock Street | £65,000 (2003) | £140,000 (2021) | +4.4% | +2.0% |
| 30 Lock Street | £40,000 (2009) | £115,000 (2018) | +12.5% | +9.9% |
| 19 Lock Street | £13,750 (1999) | £95,000 (2017) | +11.3% | +8.9% |
| 12 Lock Street | £60,000 (2015) | £129,000 (2016) | +115.0% | +112.9% |
| 21 Lock Street | £47,000 (2003) | £125,000 (2015) | +8.5% | +5.9% |
| HIGHCROFT Lock Street | £149,995 (2006) | £150,000 (2015) | +0.0% | -2.6% |
| 65 Lock Street | £54,000 (2012) | £81,500 (2014) | +22.9% | +20.4% |
| 22 Lock Street | £40,000 (2002) | £87,000 (2013) | +7.3% | +4.6% |
Section 04
What sells here
The mix of property types explains a large part of any area's median. Lock Street, Mountain Ash is dominated by the type at the top of this table, so its overall median leans that way.
| Property type | Sales | Share | Median paid | Range |
|---|---|---|---|---|
| Semi-detached | 38 | 45.8% | £49,000 | £10,000 – £180,000 |
| Terraced | 38 | 45.8% | £54,000 | £13,750 – £152,500 |
| Detached | 7 | 8.4% | £157,500 | £125,000 – £260,000 |
Section 06
Ownership and new build in Lock Street, Mountain Ash
0 of the sales on record are leasehold and 83 freehold — 0.0% of the market. Tenure is not a detail: a leasehold flat and a freehold house are different assets, and mixing them into one median hides the difference.
| Category | Sales | Share | Median paid |
|---|---|---|---|
| Leasehold | 0 | 0.0% | — |
| Freehold | 83 | 100.0% | £62,000 |
| New build | 2 | 2.4% | £34,000 |
| Existing home | 81 | 97.6% | £65,000 |
New builds sold for less than the median existing home — -47.7%. A new-build premium is normal: the buyer gets a warranty and nothing to fix, and the price is set by a developer rather than negotiated between two households.
Section 09
How Lock Street, Mountain Ash compares
The median across the whole archive is £157,500. Lock Street, Mountain Ash sits below that national figure — -60.6%.
Within Mountain Ash the street ranks 119 of 225 by median price, and its median is above the town figure of £60,000 (+3.3%).
No EPC floor areas could be matched to these sales, so no price per square metre is published here. An estimate would be a guess, and the archive does not publish guesses.
The full range on record runs from £10,000 to £260,000. Extremes usually mean something unusual — a plot sold without a house on it, a transfer between family members, or a very large property — so the median is the number to trust.
Section 10
Nearby on the record
Streets nearby
- Park Street£45,500 median
- Abercynon Road£58,000 median
- Penrhiwceiber Road£48,500 median
- Pentwyn Avenue£36,000 median
- Woodfield Terrace£44,000 median
- Cardiff Road£53,500 median
- Woodland Street£51,000 median
- Forest View£89,950 median
- Phillip Street£51,750 median
- High Street£45,000 median
- Aberdare Road£70,000 median
- Greenfield Terrace£66,000 median
- Mountain Ash Road£75,000 median
- Maes Y Ffynnon£108,000 median
- Clarence Street£48,000 median
- Grovers Field£105,750 median
Addresses with more than one recorded sale
- 16 Lock Street4 sales
- 56 Lock Street4 sales
- 59 Lock Street3 sales
- LOCK HOUSE Lock Street3 sales
- 11 Lock Street3 sales
- 30 Lock Street3 sales
- 31 Lock Street3 sales
- 55 Lock Street3 sales
- 19 Lock Street2 sales
- 12 Lock Street2 sales
- 21 Lock Street2 sales
- HIGHCROFT Lock Street2 sales
- 65 Lock Street2 sales
- 22 Lock Street2 sales
- 61 Lock Street2 sales
- 54 Lock Street2 sales
- 50 Lock Street2 sales
- 1 Lock Street2 sales
- 9 Lock Street2 sales
- 43 Lock Street2 sales
- 62 Lock Street2 sales
- 35 Lock Street2 sales
Back to Mountain Ash house prices.
Quick answers
Common questions about this data
What is the average house price in Lock Street, Mountain Ash?
The median price paid in Lock Street, Mountain Ash across every sale on the register is £62,000. The median is used rather than the mean because a handful of very large sales would otherwise drag the average away from what a typical buyer paid.
How many homes have sold in Lock Street, Mountain Ash?
83 sales are on record for Lock Street, Mountain Ash, the most recent completing on 10 Feb 2026. Every one is a completed transfer lodged with HM Land Registry, not an asking price or an estimate.
Have Lock Street, Mountain Ash house prices actually risen?
In cash, the median rose +92.3% between 2003 and 2015. In 2026 money — that is, after inflation — the change is +43.5%. Both numbers are true; only the second one tells you whether buying here preserved value.
When were Lock Street, Mountain Ash house prices at their highest?
The highest yearly median on record is £125,000, set in 2015. That is the cash figure; measured in 2026 money the peak may fall in a different year, because inflation reshapes the series.
What is the price per square metre in Lock Street, Mountain Ash?
No EPC floor areas could be matched to these sales, so no price per square metre is published for this area. Nothing is estimated to fill the gap.
How current is this data?
The latest sale shown here completed on 10 Feb 2026. HM Land Registry publishes Price Paid Data monthly and a sale can take a month or two to appear after completion, so the most recent weeks are always incomplete.
Cite this page: Sold Price History, “Lock Street, Mountain Ash house prices”, 2026. Source: HM Land Registry Price Paid Data © Crown copyright and database right, used under the Open Government Licence v3.0. Inflation adjustment: ONS CPIH.