Mardley Dell, Welwyn
House prices, sold prices and local information for AL6 0UR.
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At a glance
5 property sales on Mardley Dell, Welwyn have been recorded by HM Land Registry since 2017. The most recent sale was on 24 Jun 2021. Most sales here are detached homes, which have sold for an average of £809,900. 1 home here has sold more than once since 2017; 1 of them sold for more the second time. Recorded sale prices on Mardley Dell range from £752,000 to £900,000. Every home sold here was sold freehold.
House prices on Mardley Dell compared
Average sale price over the last 12 months. Mardley Dell has had fewer than two sales in that time, so it is left out. See all AL6 house prices.
Average sale price by year
Tenure: 100% freehold and 0% leasehold across 5 recorded sales.
Prices by property type
| Type | Sales | Average price | Last sold |
|---|---|---|---|
| Detached | 5 | £809,900 | 24 Jun 2021 |
Sold prices on Mardley Dell
| Address | Date | Price | Type | Tenure |
|---|---|---|---|---|
| 19, Mardley Dell AL6 0UR | 24 Jun 2021 | £900,000 | Detached | Freehold |
| 1, Mardley Dell AL6 0UR | 26 Mar 2021 | £775,000 | Detached | Freehold |
| 11, Mardley Dell AL6 0UR | 11 Mar 2020 | £752,000 | Detached | Freehold |
| 19, Mardley Dell AL6 0UR | 10 May 2018 | £817,500 | Detached | Freehold |
| 21, Mardley Dell AL6 0UR | 23 Nov 2017 | £805,000 | Detached | Freehold |
Sale prices are as recorded by HM Land Registry. Some sales (for example repossessions and company purchases) are listed but left out of the averages.
Sale history: homes sold more than once
| Address | Sales | Change |
|---|---|---|
| 19, Mardley Dell | £817,500 (May 2018) → £900,000 (Jun 2021) | +10% over 3 yrs |
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Schools near Mardley Dell
| School | Type | Ages | Ofsted | Distance |
|---|---|---|---|---|
| St Michael's Woolmer Green CofE VA Primary School 186 pupils | Primary Church of England | 4–11 | Report | 0.4 mi |
| Oaklands Primary School 195 pupils | Primary | 4–11 | Good Report | 0.6 mi |
| Knebworth Primary and Nursery School 390 pupils | Primary | 3–11 | Report | 1.2 mi |
| All Saints Church of England Voluntary Aided Primary School, Datchworth 120 pupils | Primary Church of England | 4–11 | Good Report | 1.2 mi |
| Sherrardswood School 445 pupils | Other independent school | 2–19 | Report | 1.6 mi |
| Tenterfield Nursery School 71 pupils | Nursery | 2–5 | Report | 1.9 mi |
| Welwyn St Mary's Church of England Voluntary Aided Primary School 418 pupils | Primary Church of England | 4–11 | Report | 1.9 mi |
| Knightsfield School 65 pupils | Academy special converter | 9–18 | Report | 2.0 mi |
Source: Department for Education (Get Information about Schools) and Ofsted. Grades are from each school's last graded inspection; newer inspections use report cards without a single overall grade, so check the full report. Distances are straight-line. Check catchment areas with the local council.
Getting around, shops and health
Train stations
- Knebworth station 1.3 mi · 26 min walk
- Welwyn North station 1.7 mi · 34 min walk
- Watton-at-Stone station 3.0 mi · 59 min walk
Nearest bus stops
- The Drive (opp, Mardley Hill) 1 min walk
- The Drive (nr, Mardley Hill) 1 min walk
- Mardley Avenue (nr, Mardley Hill) 3 min walk
- Mardley Avenue (opp, Mardley Hill) 4 min walk
GP surgeries
- Knebworth & Marymead Practice
7 St Martins Road, Knebworth · 1.3 mi - Bridge Cottage Surgery
41 High Street, Welwyn · 1.7 mi - Shephall Health Centre
Ridlins End, Stevenage · 3.1 mi
Supermarkets
- Tesco Express Tesco Woolmer Green Express · 0.6 mi
- The Co-operative Food Co-op Knebworth · 1.3 mi
- Tesco Express Tesco Welwyn Express · 1.7 mi
- Marks and Spencer BP M&S Nodeway BP · 2.0 mi
Pharmacies
- Pharmacy Express · 1.3 mi
- Barnes Pharmacy · 1.7 mi
- Codicote Pharmacy · 1.9 mi
Dentists
- Knebworth Dental Surgery · 0.9 mi
- Dental Surgery · 1.3 mi
- Broadwater Dental Practice · 2.3 mi
Sources: Department for Transport (NaPTAN), NHS England organisation data, and GEOLYTIX Retail Points (open data). Walking times are estimates from straight-line distance.
Area profile
Deprivation
This neighbourhood is in decile 10 of 10 on the English Indices of Deprivation 2025, where 1 is the most deprived 10% of areas in England and 10 the least deprived.
| Income | 10 of 10 |
| Employment | 10 of 10 |
| Education and skills | 10 of 10 |
| Health and disability | 10 of 10 |
| Crime | 9 of 10 |
| Access to housing and services | 5 of 10 |
| Living environment | 9 of 10 |
Each domain ranked in deciles across England (10 = least deprived).
Homes
| Here | Eng & Wales | |
|---|---|---|
| Owned | 93.8% | 62.5% |
| Private rented | 4.7% | 20.3% |
| Social rented | 1.5% | 17.1% |
| Households | 548 |
People
| Here | Eng & Wales | |
|---|---|---|
| Under 15 | 15.8% | 17.4% |
| Aged 15–64 | 59.3% | 64.1% |
| Aged 65+ | 24.9% | 18.6% |
| Residents | 1,444 |
Broadband
| Here | UK | |
|---|---|---|
| Superfast (30Mbit+) | 100% | 95% |
| Ultrafast (300Mbit+) | 100% | 80% |
| Gigabit-capable | 100% | 80% |
Share of homes on this street's postcodes that can get each speed. UK figure is the average across all postcodes. Source: Ofcom Connected Nations.
Mobile signal
| Here | Eng & Wales | |
|---|---|---|
| 4G indoors, all 4 networks | 95% | 89% |
| 4G indoors, at least 1 network | 100% | 100% |
| 4G outdoors, all 4 networks | 100% | 99% |
| Calls indoors, all 4 networks | 96% | 92% |
Share of homes across Welwyn Hatfield with good coverage (Jul 2025). Signal varies street by street; check your exact address on Ofcom's checker. Source: Ofcom Connected Nations.
Neighbourhood figures cover the surrounding Lower Layer Super Output Area (about 1,500 residents). Sources: Census 2021 (ONS) and the English Indices of Deprivation 2025.
Energy ratings and home sizes on Mardley Dell
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Who lives around Mardley Dell
Ethnic group
| Here | Welwyn Hatfield | |
|---|---|---|
| White | 86.9% | 78.7% |
| Asian, Asian British or Asian Welsh | 6.4% | 8.8% |
| Mixed or Multiple ethnic groups | 3% | 4.1% |
| Other ethnic group | 2.3% | 2.3% |
| Black, Black British, Black Welsh, Caribbean or African | 1.4% | 6.1% |
Religion
| Here | Welwyn Hatfield | |
|---|---|---|
| Christian | 49.4% | 47.2% |
| No religion | 36.3% | 37% |
| Not answered | 6% | 6.7% |
| Hindu | 2.3% | 3.2% |
| Jewish | 2.1% | 0.9% |
| Muslim | 1.7% | 3.3% |
| Sikh | 1% | – |
| Other religion | 0.7% | 0.7% |
Country of birth
| Here | Welwyn Hatfield | |
|---|---|---|
| Born in the UK | 89.1% | 78% |
| Born outside the UK | 10.9% | 22% |
Highest qualification
| Here | Welwyn Hatfield | |
|---|---|---|
| Level 4 qualifications and above | 48.1% | 37.3% |
| Level 3 qualifications | 17.5% | 19.1% |
| Level 2 qualifications | 11.7% | 12.9% |
| No qualifications | 8.3% | 14.3% |
| Level 1 and entry level qualifications | 8.2% | 9.2% |
| Apprenticeship | 4.1% | 4.5% |
| Other qualifications | 2.1% | 2.7% |
General health
| Here | Welwyn Hatfield | |
|---|---|---|
| Very good health | 53.9% | 51.7% |
| Good health | 34.3% | 33.5% |
| Fair health | 9.4% | 11% |
| Bad health | 1.5% | 3.1% |
| Very bad health | 0.9% | 0.8% |
Cars or vans per household
| Here | Welwyn Hatfield | |
|---|---|---|
| 2 cars or vans in household | 43.6% | 29.5% |
| 3 or more cars or vans in household | 28.1% | 11.3% |
| 1 car or van in household | 23.7% | 41.6% |
| No cars or vans in household | 4.6% | 17.6% |
Source: Census 2021 (ONS), via Nomis. Percentages of usual residents or households, as recorded in March 2021.
Figures cover the surrounding neighbourhood (Lower Layer Super Output Area, about 1,500 residents). Full demographics of Welwyn Hatfield.
Planning and heritage near Mardley Dell
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Noise, radon and ground hazards
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Planning applications near Mardley Dell
Recent planning applications around Mardley Dell from the council's planning register. Choose how far to look:
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Council tax here
Welwyn Hatfield Band D is £2,452 a year (Band A £1,635). See every band.
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