The Triangle, Mountain Ash house prices are built from 54 sales lodged with HM Land Registry, the oldest in 1997 and the most recent on 20 Feb 2026. The median price paid across the whole record is £70,750.
Median price paid
£70,750
Median per m²
£950
HM Land Registry54 sales15 with floor areaLatest sale 20 Feb 2026
Section 01
How The Triangle, Mountain Ash prices moved
There are too few years of sales in The Triangle, Mountain Ash to plot a trend line. The figures below are drawn from the whole record rather than a yearly series.
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 |
|---|---|---|---|---|
| 10 | 20 Feb 2026 | Terraced | £160,000 | £160,000 |
| 34 | 24 Nov 2025 | Terraced | £169,995 | £173,691 |
| 26 | 31 Oct 2025 | Terraced | £130,000 | £132,826 |
| 27 | 18 Jul 2025 | Terraced | £175,000 | £178,804 |
| 39 | 21 Jun 2024 | Detached | £242,000 | £254,642 |
| 24 | 15 Mar 2024 | Terraced | £144,000 | £151,522 |
| 29 | 7 Jun 2022 | Terraced | £149,995 | £173,782 |
| 21 | 7 Jan 2022 | Terraced | £85,000 | £98,480 |
| 25 | 16 Dec 2021 | Terraced | £150,000 | £189,516 |
| 30 | 26 Feb 2021 | Terraced | £123,000 | £155,403 |
| 27 | 7 Jan 2019 | Terraced | £105,000 | £137,338 |
| 31 | 27 Jul 2017 | Terraced | £110,000 | £149,710 |
| 19 | 28 Aug 2015 | Terraced | £91,000 | £128,310 |
| 35 | 11 Feb 2013 | Terraced | £92,000 | £134,147 |
| 6 | 28 Sep 2012 | Terraced | £75,000 | £112,023 |
| 11 | 16 Mar 2012 | Terraced | £69,000 | £103,061 |
| 16 | 30 Apr 2010 | Terraced | £108,500 | £173,256 |
| 30 | 15 May 2009 | Terraced | £87,500 | £143,794 |
| 23 | 5 Sep 2007 | Terraced | £82,000 | £142,565 |
| 16 | 11 May 2007 | Terraced | £118,000 | £205,154 |
| 34 | 9 Mar 2007 | Terraced | £106,000 | £184,291 |
| 10 | 5 Feb 2007 | Terraced | £95,000 | £165,166 |
| 12 | 27 Mar 2006 | Terraced | £73,500 | £130,852 |
| 22 | 20 Jan 2006 | Terraced | £99,000 | £176,250 |
| 6 | 16 Dec 2005 | Terraced | £94,500 | £172,151 |
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 The Triangle, 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 |
|---|---|---|---|---|
| 10 the Triangle | £28,000 (1997) | £160,000 (2026) | +6.2% | +3.5% |
| 34 the Triangle | £106,000 (2007) | £169,995 (2025) | +2.7% | -0.3% |
| 26 the Triangle | £23,000 (2001) | £130,000 (2025) | +7.5% | +4.6% |
| 27 the Triangle | £105,000 (2019) | £175,000 (2025) | +8.9% | +4.5% |
| 24 the Triangle | £32,000 (2000) | £144,000 (2024) | +6.5% | +3.7% |
| 29 the Triangle | £67,000 (2004) | £149,995 (2022) | +4.6% | +1.9% |
| 30 the Triangle | £42,500 (2000) | £123,000 (2021) | +5.2% | +2.9% |
| 31 the Triangle | £75,000 (2004) | £110,000 (2017) | +3.0% | +0.6% |
| 19 the Triangle | £19,000 (1999) | £91,000 (2015) | +10.3% | +7.8% |
| 35 the Triangle | £36,000 (1998) | £92,000 (2013) | +6.5% | +4.0% |
| 6 the Triangle | £69,000 (2005) | £75,000 (2012) | +1.2% | -1.6% |
| 16 the Triangle | £37,000 (2000) | £108,500 (2010) | +11.4% | +8.9% |
Section 04
What sells here
The mix of property types explains a large part of any area's median. The Triangle, 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 |
|---|---|---|---|---|
| Terraced | 52 | 96.3% | £69,000 | £19,000 – £175,000 |
| Semi-detached | 1 | 1.9% | £72,500 | £72,500 – £72,500 |
| Detached | 1 | 1.9% | £242,000 | £242,000 – £242,000 |
Section 06
Ownership and new build in The Triangle, Mountain Ash
0 of the sales on record are leasehold and 54 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 | 54 | 100.0% | £70,750 |
A further 3 transfers for this area are on the register but are left out of every figure above. HM Land Registry marks them as additional price paid entries: repossessions, buy-to-let portfolio moves, transfers between companies or family, and sales at a discount such as right to buy. They are real records but they are not open-market prices, and including them would drag the median somewhere no buyer ever paid.
Section 09
How The Triangle, Mountain Ash compares
The median across the whole archive is £157,500. The Triangle, Mountain Ash sits below that national figure — -55.1%.
Within Mountain Ash the street ranks 83 of 225 by median price, and its median is above the town figure of £60,000 (+17.9%).
Where an EPC floor area could be matched to the sale, the median works out at £950 per square metre, across 15 of the 54 sales on record. Price per square metre is the only figure that compares a two-bed flat with a four-bed house honestly.
The full range on record runs from £19,000 to £242,000. 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
- 10 the Triangle5 sales
- 13 the Triangle4 sales
- 30 the Triangle3 sales
- 6 the Triangle3 sales
- 16 the Triangle3 sales
- 22 the Triangle3 sales
- 34 the Triangle2 sales
- 26 the Triangle2 sales
- 27 the Triangle2 sales
- 24 the Triangle2 sales
- 29 the Triangle2 sales
- 31 the Triangle2 sales
- 19 the Triangle2 sales
- 35 the Triangle2 sales
- 14 the Triangle2 sales
- 20 the Triangle2 sales
Back to Mountain Ash house prices.
Quick answers
Common questions about this data
What is the average house price in The Triangle, Mountain Ash?
The median price paid in The Triangle, Mountain Ash across every sale on the register is £70,750. 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 The Triangle, Mountain Ash?
54 sales are on record for The Triangle, Mountain Ash, the most recent completing on 20 Feb 2026. Every one is a completed transfer lodged with HM Land Registry, not an asking price or an estimate.
When were The Triangle, Mountain Ash house prices at their highest?
The highest yearly median on record is £34,000, set in 2000. 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 The Triangle, Mountain Ash?
£950 per square metre, from the 15 sales where an EPC floor area could be matched to the address. Price per square metre strips out size, so a flat and a house can be compared on the same basis.
How current is this data?
The latest sale shown here completed on 20 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, “The Triangle, 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.