AVENOHOME@avenohome

Before You View

Compare exceptional homes
before you arrange a viewing.

See what fits your life, understand the trade-offs, and know what to ask.

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How to read this comparison

Headline details are agent or publisher claims unless a source-backed fact is explicitly marked verified. Aveno interpretations and calculations are labelled separately. Unknown means evidence is missing, not that a property fails a check.

Your first home
Before You View

Harmer Green Lane

Open Aveno dossier →Savills Harpenden via OnTheMarket ↗
Asking / guide priceHarmer Green Lane£3,850,000Agent / publisher claim · observed 24 Aug 2026Savills Harpenden via OnTheMarket ↗
Location & characterHarmer Green LaneWelwyn, Hertfordshire

Large-scale contemporary leisure house

Published description
Bedrooms & bathroomsHarmer Green Lane7 bedrooms

6 bathrooms

Agent / publisher claim; layout needs checking.
Floor area & its limitsHarmer Green LaneApprox. 8,803 sq ftPublished measurement; not independently measured.
Measurement qualifications

Signed component-area schedule explaining the 8,803–9,691 sq ft range

Land, gardens & accommodationHarmer Green LanePublished land: approx. 1.45 acres

The four-storey accommodation includes a marble entrance hall and 360-degree galleried landing, principal and guest suites with dressing rooms, five further bedrooms, several reception rooms and a south-westerly garden connection.

The lower-ground leisure suite combines a heated indoor pool, jacuzzi, changing/shower room, gym and plant room; a detached triple garage carries a self-contained annexe above.

Agent / publisher claims. Unrecorded amenities and land extent remain unknown.
Energy & completionHarmer Green Lane

EPC C — current listing claim; certificate to obtain

Advertised performance does not establish measured use.

Needs checking: Current EPC certificate, planning/completion/warranty archive and actual pool, energy, security, grounds and insurance costs

Status & asking-price historyHarmer Green LaneFor saleObserved 24 Aug 2026

Checking saved history…

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Recorded transaction (separate)Harmer Green Lane

Unknown: no matched prior transaction is connected to this record.

Important missing informationHarmer Green Lane
  • Official house name/number, title number, UPRN and registered extent
  • Signed component-area schedule explaining the 8,803–9,691 sq ft range
  • Current EPC certificate, planning/completion/warranty archive and actual pool, energy, security, grounds and insurance costs
Missing evidence is not a negative finding.

The reality of ownership

Features can bring both enjoyment and ongoing attention. These observations identify what to investigate, not estimated bills or confirmed defects.

Harmer Green Lane

Pool or spa

Publisher evidenceThe lower-ground leisure suite combines a heated indoor pool, jacuzzi, changing/shower room, gym and plant room; a detached triple garage carries a self-contained annexe above.

Practical questionWhat servicing, water treatment, plant replacement and winterisation does the pool or spa require, and can you provide service records?

Gardens and grounds

Publisher evidenceThe four-storey accommodation includes a marble entrance hall and 360-degree galleried landing, principal and guest suites with dressing rooms, five further bedrooms, several reception rooms and a south-westerly garden connection.

Practical questionWho maintains the gardens and grounds, what is included in the sale, and can you provide the maintenance schedule?

Ask before you view

  1. What servicing, water treatment, plant replacement and winterisation does the pool or spa require, and can you provide service records?
  2. Who maintains the gardens and grounds, what is included in the sale, and can you provide the maintenance schedule?
  3. Which accommodation is approved for its advertised use, and are access, services and heating independent?
  4. What evidence can you provide before a viewing to resolve: Official house name/number, title number, UPRN and registered extent?
  5. For Harmer Green Lane's advertised 7 bedrooms, which share a level with a bathroom and living space, and what steps are on the route from parking?

Occasional occupation: ask who checks this property while empty and what its services and insurance require.

Source evidence and qualifications
Agent / publisher claimLive sale

£3,850,000; 7 bedrooms; 8,803 sq ft

Observed 24 Aug 2026
Agent / publisher claimExact identity

Harmer Green Lane, Welwyn

Observed 24 Aug 2026
Agent / publisher claimArchitecture and specification

An 8,803 sq ft gated contemporary residence with an indoor pool, gym, seven-bedroom main house, guest annexe and triple garaging in 1.45 private acres.

Observed 24 Aug 2026
Unknown / needs checkingDecision document

The official title-and-UPRN identity bridge joined to a component RICS measurement, the complete planning/Building Control/warranty archive and three years of pool, energy, plant and grounds operating records.

Observed 24 Aug 2026

Before You View supports initial research. It does not replace a survey, legal checks or professional valuation. Confirm availability and dated information with the selling agent before arranging a viewing.