The Castledene Group

Part of Casa Group Holdings· Established 2008· 11 branches

The Castledene Group (trading network including Holbrook & Co, Hegartys, James Winn, Red Hot, Jill Moore Select Properties and Signature Collection) is a North East and North Yorkshire estate agency group founded in 2008, operating 10-11 branches from Northumberland to North Yorkshire under multiple local trading brands.

Accreditations & memberships

The Property Ombudsman

11 branches

Group Head Office / Castledene Lettings

2 Lighthouse View, Seaham, SR7 7PR

01915 274000 info@casa-group.com

Holbrook & Co Sales & Lettings (Seaham)

48 Church Street, Seaham

01915 815709

Holbrook & Co Sales & Lettings (Bishop Auckland)

121 Newgate Street, Bishop Auckland

Holbrook & Co Sales & Lettings (Hartlepool)

19 Victoria Road, Hartlepool

Hegartys Sales & Lettings

Wheeler House, Houghton le Spring

James Winn Estate Agents (Thirsk)

2 Bakers Alley, Thirsk

James Winn Estate Agents (Northallerton)

231 High Street, Northallerton

Red Hot Sales & Lettings (Hexham)

13 Battle Hill, Hexham

Red Hot Sales & Lettings (Prudhoe)

68 Front Street, Prudhoe

Jill Moore Select Properties

51/52 The Galleries, Washington

Signature Collection by Holbrook & Co

Wynyard, Wynyard

Areas covered

seaham bishop auckland hartlepool houghton le spring thirsk northallerton hexham prudhoe washington

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Details verified from The Castledene Group’s own website · July 2026