Edward Haycock Sr.

• Shrewsbury 1814–16: Lord Hill's Column at Shrewsbury (assisted by Thomas Harrison of Chester[12]
• Shrewsbury, The Butter Market, Pride Hill, 1819–20, demolished 1830 – New Butter Market[12]
• Dolgellau, Merionethshire, The County Hall, 1823-5[12]
• Coed-Cwnwr Almshouses, Monmouthshire, 1825[12]
• Shire Hall, Presteigne 1826-9[12][13]
• Shrewsbury, The Salop Infirmary,[12] rebuild 1827–30[14]
• Monmouth, Shire Hall extension, c. 1830[12]
• Old Town Hall, Ellesmere, 1833[15]
• Cardiff, The Market[12]
• Neath Market, 1835-6[12]
• Shrewsbury Savings Bank[12]
• Shrewsbury The Music Hall, 1839–40[12]
• Wrockwardine Almshouses[12]
• Dowlais Market Hall[12]
• Llandovery National School[12]
• Llandeilo Bridge, 1848[12]
• Shrewsbury Lancastrian School[12]
• Shrewsbury St Chad's School, 1859[12]
• Shropshire County Lunatic Asylum alterations[16]

A newspaper obituary states Haycock also "obtained first prizes for plans for the Birmingham and New Orleans Infirmaries"[17] but these are not mentioned by Colvin.

Shropshire

• Shrewsbury St George, Frankwell 1829–32
• Tilstock 1835
• Whitchurch, St Catherine, Doddington. 1836-7
• Cruckton 1840
• Cressage 1841
• Cound 1842-3
• Bayston Hill 1843
• Clun Chapel Lawn 1843
• Hope 1843
• Middleton-in-Chirbury 1843
• Dorrington 1843-5
• Newcastle 1848
• Church Pulverbatch 1852-3
• Christ Church Shelton and Oxon 1854

Staffordshire

• Tettenhall 1825

Breconshire

• Hay on Wye 1833-4

Cardiganshire

• Aberaeron 1835

Carmarthenshire

• Carmarthen St David.
• Llannon 1841

Ceredigion

• Aberaeron
• Aberystwyth St Michael 1830-3
• St David's Church, Barmouth 1830

Glamorgan

• Caerphilly 1826
• Tai Bach Margam 1827
• Beulah Calvinistic Methodist Chapel, Groes, 1838

Merioneth

• Barmouth 1830

Monmouthshire

• Abersychan 1831-2
• Trevethin St Thomas 1831-2
• Lanvaud 1843

Montgomeryshire

• Machynlleth 1827

Shropshire

• Onslow Hall 1815–20 – Remodelled house for John Wingfield[16]
• Loton Park – Reconstructed south front 1819.[16]
• Hodnet Rectory. For Rev Reginald Heber. Presumably a joint design with his father.[16]
• Stanton Lacy Downton Hall near Ludlow. 1824 – New front entrance[18]^: 251
• Clungunford House.1825-8. For the Rev John Rocke.[16]
• Orleton Hall. Refronted house c1830.[16]
• Walford Manor 1831–5.[19]
• Leaton Knolls. c1835. Demolished 1955.[16]
• Millichope Park, Shropshire 1835–40, Greek Revival house for Rev. R. N. Pemberton.[19]
• Longner Hall. Alterations 1838–42.[19][18]
• Condover Vicarage 1843. Tudorish.[19]
• Badger Hall. Alterations 1849–50.[19]
• Netley Hall, Shropshire.1854-8.[19]
• Stanton Lacy Vicarage.[16]

Herefordshire

• Shobdon Court. Alterations c1830-5.[16]
• Shobdon Rectory. 1844.[19]

Northamptonshire

• Kelmarsh Hall. Minor alterations 1842.[19]
• Farthingstone Rectory. Enlarged 1842–3.[19]

Caernarfonshire

• Glynllifon 1836–49. For Lord Newborough.[19]

Carmarthenshire

• Stradey Castle 1849–53.[19]

Cardiganshire

• Llansantffraed Alltlwyd House 1832.[19]
• Plas Llangoedmor, Rebuilt 1833.[19]
• Monordeifi (Manordeifi), Clynfyw c1849-50 (now Pembrokeshire).[19]
• Llandygwydd Penlyan. 1852.[19]

Ceredigion

• Nanteos Portico, new dining room and new frontage to stable block, c. 1839–49. The original stable block appear to have been built to designs by John Nash in c. 1813–15.[19]

Glamorgan

• Penrice Castle Minor Works.[19]
• Swansea Penllergare. 1836. Demolished except for a lodge and observatory.[19]
• Sketty Hall −1830s Entrance hall[20]

Montgomeryshire

• Welshpool Rectory
• Churchstoke Vicarage. Enlarged 1846–7.[16]

Monmouthshire

• Clytha Park 1824–28 – House for William Jones

Neath Port Talbot

• Margam Castle 1830-1835 - Haycock worked as supervising architect, in support of Thomas Hopper[21]

Radnorshire

• Stanage Park. Alterations 1845.[19]