According to data from HM Land Registry, Cornerstone, Ascot sits on a plot of 2,405 m².

We have plot size data on 33 out of 37 other houses in the postcode and Cornerstone, Ascot sits on the 4th largest plot.

Cornerstone, Ascot has an Energy Performance Rating (EPC) of C. This is based on the most recent assessment, dated 30 May 2022.

The property is connected to mains gas and has fully double glazed windows. It is heated using a boiler and radiators (mains gas).

According to HM Land Registry, Cornerstone, Ascot was last sold on 1st November 2022 for £2,100,000 and was recorded as a freehold house.

The property has only had this single sale since 1995.

Since November 2022, the market for similar properties has dropped by 23.2%.

• Sold Nov 2022£2,100,000

According to the Land Registry and our network of Estate Agents, there have been 22 sales of properties similar to Cornerstone, Ascot within a radius of 1.6 kilometres since 2007.

The most recent example is Ashbury House, Priory Road, Ascot, SL5 9RQ, a freehold house which sold for £2,000,000 on the 29th September 2025.

Read more about house prices in SL5.

• Sold Sep 2025£2,000,000 | 6 Bed HouseAshbury House, Priory Road, Ascot, SL5 9RQAshbury House, Priory Road, Ascot, SL5 9RQ
• Sold Nov 2023£2,200,000 | 6 Bed HouseThe Tudor Cottage, Priory Road, Ascot, SL5 9RQThe Tudor Cottage, Priory Road, Ascot, SL5 9RQ
• Sold Oct 2023£2,100,000 | 6 Bed HouseLexington, Broomfield Park, Ascot, SL5 0JTLexington, Broomfield Park, Ascot, SL5 0JT
• Sold Aug 2023£1,900,000 | 6 Bed HouseRidge House, Shrubbs Hill Lane, Ascot, SL5 0LDRidge House, Shrubbs Hill Lane, Ascot, SL5 0LD
• Sold Jul 2023£1,275,000 | 6 Bed HouseBroomfield Cottage, Broomfield Park, Ascot, SL5 0JTBroomfield Cottage, Broomfield Park, Ascot, SL5 0JT
• Sold Jul 2023£2,062,500 | 6 Bed House7, Sheridan Grange, Ascot, SL5 0BX7, Sheridan Grange, Ascot, SL5 0BX
• Sold Apr 2023£2,205,000 | 6 Bed HouseSemples Lodge, Meadow Road, Virginia Water, GU25 4NHSemples Lodge, Meadow Road, Virginia Water, GU25 4NH
• Sold Sep 2021£1,505,000 | 6 Bed HouseRajsheel, Onslow Road, Ascot, SL5 0HWRajsheel, Onslow Road, Ascot, SL5 0HW
• Sold Nov 2020£1,800,000 | 6 Bed HouseWindlestream Cottage, Ballencrieff Road, Ascot, SL5 9RAWindlestream Cottage, Ballencrieff Road, Ascot, SL5 9RA
• Sold Oct 2020£2,175,000 | 6 Bed House4, Pinecote Drive, Ascot, SL5 9PS4, Pinecote Drive, Ascot, SL5 9PS
• Sold Oct 2020£1,950,000 | 6 Bed HouseBroadleaf House, Sunningdale Heights, Ascot, SL5 0BFBroadleaf House, Sunningdale Heights, Ascot, SL5 0BF
• Sold Aug 2019£1,950,000 | 6 Bed HousePinewood House, Heather Drive, Ascot, SL5 0HTPinewood House, Heather Drive, Ascot, SL5 0HT
• Sold Dec 2018£1,700,000 | 6 Bed HouseBeaumont House, Station Road, Ascot, SL5 0QRBeaumont House, Station Road, Ascot, SL5 0QR
• Sold May 2018£2,650,000 | 6 Bed HouseMirabel, Shrubbs Hill Lane, Ascot, SL5 0LDMirabel, Shrubbs Hill Lane, Ascot, SL5 0LD
• Sold Mar 2018£1,770,000 | 6 Bed House3, Pinecote Drive, Ascot, SL5 9PS3, Pinecote Drive, Ascot, SL5 9PS
• Sold Dec 2017£1,850,000 | 6 Bed HouseChestnut House, Sunningdale Heights, Ascot, SL5 0BFChestnut House, Sunningdale Heights, Ascot, SL5 0BF
• Sold Jan 2015£1,000,000 | 6 Bed HouseHedgerley, Onslow Road, Ascot, SL5 0HWHedgerley, Onslow Road, Ascot, SL5 0HW
• Sold Jul 2014£1,900,000 | 6 Bed HouseAutumn House, Broomfield Park, Ascot, SL5 0JTAutumn House, Broomfield Park, Ascot, SL5 0JT
• Sold Aug 2009£1,550,000 | 6 Bed HouseQueensbury, Priory Road, Ascot, SL5 9RQQueensbury, Priory Road, Ascot, SL5 9RQ
• Sold Oct 2007£1,640,000 | 6 Bed HouseManor House, London Road, Ascot, SL5 0JWManor House, London Road, Ascot, SL5 0JW

Onslow Road, Ascot, SL5 has a total of 42 addresses. According to our analysis of all the public data, Cornerstone, Ascot is the 3rd largest and the 2nd most expensive property on the street.

When compared to the postcode district it is £1.204m more expensive than the average property in SL5.

• Holy Trinity CofE Primary School, Sunningdale

  1.1 km away
• St Michael's CofE Primary School, Sunninghill

  2.5 km away
• Valley End CofE Infant School

  3.1 km away

• Charters School

  2.0 km away
• Gordon's School

  5.6 km away
• Salesian School, Chertsey

  7.3 km away

• Sunningdale

  |

  700 m away
• Longcross

  |

  2.1 km away
• Ascot (Berks)

  |

  4.0 km away

According to data from the Environment Agency, the flood risk in this area is considered to be Very Low.