Extensively refurbished classical luxury estate with contemporary leisure and guest accommodation
Home 157 · For sale
Shai Mansion
Byfleet Road, Cobham, Surrey
Independent reading
A five-acre Cobham estate with 10,535 sq ft in the principal house and 12,526 sq ft across the marketed accommodation, including a separate guest cottage.
Separate the main-house and total-accommodation denominators. The £7.25m ask equates to about £688 per principal-house sq ft or £579 across the blended 12,526 sq ft total; neither is a valuation. Title, cottage use, leisure approvals, plant condition and actual running records decide whether the wider estate programme supports the price case.
Bedrooms6
Publisher-stated area10,535 sq ft
The 30-second view
Three things worth knowing.
Whether the title, lawful ancillary uses, signed component areas and actual estate operating records support treating the guest and leisure programme as value rather than liability.
The blended 12,526 sq ft headline makes the price density look lower than the 10,535 sq ft main-house denominator while combining space with different use, condition and operating obligations.
Consider the next stepUnderstand the purchase.
Explore costs, work back from your budget, and discover three alternatives.
+
Understand the purchase.
Explore costs, work back from your budget, and discover three alternatives.
A clearer purchase / Shai Mansion
The house price is
only the beginning.
A private illustration for an individual buying one residential property. Choose the property’s tax location before calculating. Your answers stay on this page.
Ownership and main-residence replacement rules matter. Select based on your circumstances; owning another home does not always mean the surcharge applies.
Tax rates checked 26 October 2026. Rules can change; verify for your completion date.
HMRC SDLT ↗Non-resident rules ↗Welsh LTT ↗Scottish LBTT ↗Scottish ADS ↗Another possibility
What else could
this budget buy?
At or below this home’s recorded reference of £7,250,000. Up to three other admitted £2.5m+ homes recorded for sale, ordered by nearest asking price below the ceiling. Location, condition, tax and ownership costs differ. Availability requires confirmation.
Osbornes Wood
South Road, St George's Hill
£6,950,000Outstandingly modernised St George's Hill residence with contemporary interiors and major entertaining wing
- Bedrooms
- 6
- Recorded area
- 6,488 sq ft
- Recorded land
- 1.06 acres
- Ownership intensity
- High · editorial
Source checked: 23 Sep 2026
Explore this home ↗Elwood
South Downs Drive, Hale
£6,750,000Three-storey contemporary smart house
- Bedrooms
- 5
- Recorded area
- 11,571 sq ft
- Recorded land
- 0.67 acres
- Ownership intensity
- High · editorial
Source checked: 14 Aug 2026
Explore this home ↗Selborne
Warren Drive, Kingswood
£6,750,000Contemporary private-estate resort house
- Bedrooms
- 6
- Recorded area
- 9,000 sq ft
- Recorded land
- 0.65 acres
- Ownership intensity
- High · editorial
Source checked: 29 Aug 2026
Explore this home ↗How we assess this homeOptional scores, the reasons behind them and the detailed decision tools.+
These are Aveno’s editorial assessments, not valuations, survey findings or guarantees. Design scores describe the selection; data-readiness scores describe how complete the recorded evidence is. Higher scores do not mean fewer purchase risks.
Why this belongs in Aveno
Remarkable is
an evidence test.
Flagship intelligence96remarkability / 100
READY private hand-off under the owner-approved any-era luxury and external-film continuity policies: current original listing, exact identity, measured component areas, complete buyer dossier and exact official external-film bridge are present; playback is access-unavailable and is not claimed.
Luxury and condition24/25
Publisher documents extensive refurbishment and a high-specification interior programme.
Design and character23/25
Classical estate identity with a coherent contemporary leisure and entertaining programme.
Privacy and setting25/25
Gated approach, security hut and more than five acres bordering St George’s Hill.
Lifestyle24/25
Pool, gym, cinema, games room, tennis court, cottage and triple garage.
- Five-acre private Cobham/Weybridge-border setting.
- Extensively refurbished principal house with substantial leisure programme.
- Separate guest/staff cottage and high-capacity entertaining accommodation.
- Named current original instruction and exact postcode.
- Explicit main-house and total-accommodation areas.
- Original source links the exact official YouTube film.
- Buyer-side unknowns and calculation denominators are explicit.
- Independent film playback was access-unavailable and is not claimed.
- Official title/UPRN and signed component measurement.
- Approvals, actual running costs, direct EPC and completed-sale comparables.
Aveno Decision Engine · live model
What does the evidence
change?
Current buyer actionINVESTIGATE — VERIFY TITLE, COMPONENT AREAS AND ESTATE COSTS
The luxury and setting are compelling; legal use, measured components and actual running evidence decide the offer.
Identity confidence100%
Shai Mansion, Byfleet Road, Cobham, Surrey
Named current original Curchods record, postcode, reference PRI230059, areas, accommodation and exact film bridge align.
UPRNStill protected
01
Premium test
Is the asking premium supported?
Guide midpoint£7,250,000£7,408 / m²
versusLocal evidence benchmarkWithheld0 size-known local references
Subject vs unadjusted evidence—
ReferenceDateAreaPrice / ask£/m²
Resulting referenceWithheldNot a valuation. It exposes how much premium the evidence must justify.
The references are not a surveyor-selected valuation set. Recency, condition, land, architecture and improvements are not fully adjusted. Aveno shows the gap instead of hiding it behind false precision.
02
True ownership load
The cost after the keys.
Five-year cost above purchase price£798,750–£818,750SDLT + disclosed transaction extras + acquisition checks + modelled running and replacement allowances. Mortgage interest and major defects excluded.
03
Claim audit
Marketing claim → buyer consequence.
Evidence readiness88/100
Tap the evidence cards as if the seller supplied them. Aveno recalculates the decision—not the beauty.
PROCEED TO VALUATION04
Property memory
The home’s price story.
Direct transaction memory is not yet matched.
This history does not prove fair value. It tells the buyer exactly how much of the current price must be explained by market growth, improvements, specification and scarcity.
Look beyond the listingSale history · heritage · planning evidenceOpen official records
Sources, facts and unanswered questionsRead the evidence ledger, publisher notes and questions to investigate.+
Official evidence map
What is matched.
What is withheld.
Land Registry can establish sale history; EPC can reveal rated floor area and energy assumptions; Planning Data can surface constraints by UPRN or coordinate. A link alone is never counted as intelligence.
connected
Original market evidence
Current £7.25m exact-property instruction.
Source ↗connectedArea reconciliation
Publisher separates 10,535 sq ft main house from 12,526 sq ft total; signed measurement remains outstanding.
Source ↗partialOfficial film
Exact current publisher bridge established; playback not independently checked.
Source ↗not matchedTitle and exact property match
Official title, UPRN and registered boundaries not connected.
Source ↗Published / verified
- The current original instruction names Shai Mansion, Byfleet Road, Cobham, Surrey KT11 1EE and marks it For Sale at £7.25m.
- Curchods attributes 10,535 sq ft to the main house and 12,526 sq ft in total, with six bedrooms, six bathrooms, six reception rooms and a self-contained staff/guest cottage.
- The publisher describes extensive refurbishment, a cinema and games wing, indoor pool, gym, tennis court, triple garage, security hut and more than five acres bordering St George’s Hill.
- Freehold tenure is a publisher attribution. Standard-rate SDLT at the £7.25m ask is £783,750; the additional-property illustration is £1,146,250. Buyer circumstances and completion-date rules require professional confirmation.
Investigate next
- Obtain the title register and plan, exact UPRN, registered acreage, access rights, covenants, security arrangements and every estate obligation.
- Commission a signed component measurement separating the principal house, cottage, leisure accommodation and garaging before using either price-density denominator.
- Check planning, Building Control, completion and lawful-use records for the cottage, leisure wing, pool, gym, cinema, games room and other refurbishment works.
- Commission building, pool/plant and services surveys; obtain three years of metered utilities, maintenance contracts, insurance, staffing, security and grounds records.
- Obtain the current direct EPC, council-tax records for each assessed unit and condition-adjusted completed-sale evidence selected by the buyer’s valuer.
Still unknown
- Official title/UPRN and independently reconciled boundaries or acreage.
- Signed component measurement, approvals and lawful use of cottage and leisure accommodation.
- Actual energy, pool, security, staffing, grounds, insurance and maintenance costs.
- Current direct EPC and condition-adjusted completed-sale comparables.
- Independent film playback was unavailable; the current original listing-to-film identity bridge is verified and no broken, removed or mismatched evidence was found.
Curchods PRI230059 was rechecked on 30 October 2026 and remains For Sale at £7.25m. Its structured record supplies exact YouTube ID 6DZ9PN_HYo4, six bedrooms, six bathrooms, 10,535 sq ft for the principal house, 12,526 sq ft total and more than five acres. Official publisher film; playback not independently checked. Map position follows the publisher record and remains area-level. Direct official YouTube watch-page link from the current original Curchods record. No iframe, agent photograph, video still or footage is copied. Playback was not independently checked and no working-playback claim is made. Original labelled Aveno area graphic and original listing link. Third-party material remains the property of its publisher. The publisher does not endorse Aveno’s independent assessment.
Record integritySee something inaccurate or hold better evidence?
Request a correction →Aveno records corrections and preserves the observation date. Owners, agents, architects and rights-holders are invited to provide documentary evidence.
Aveno Time MachineFollow this home’s market history.
Open market timeline →Price, status, withdrawal, relisting and sale signals are preserved as dated observations. Missing history is never reconstructed as fact.