These documents are recent and give plenty of detail about the coonservation area. More importantly they usually give plenty of high quality photographs.
I've linked to the man websites where I can, but some of the detail is proving elusive. I will update as and when I can.
Each is arranged by the authority carrying out the appraisal. After each authority is the list of areas covered.
Ashburton, Buckfastleigh, Chagford, Crockernwell, Drewsteignton, Dunsford, Horrabridge, Lustleigh, Lydford, Manaton, Mary Tavy, Meavy, Moretonhampstead, Murchington, North Bovey, North Brentor, Princetown, South Brent, South Tawton, South Zeal, Sticklepath, Throwleigh, Widecombe-in-the-Moor
Beer, Brampford Speke, Broadclyst, Broadhembury, Budleigh Salterton, Chardstock, Dunkeswell, East Budleigh, Kilmington, Otterton, Seaton, Sidmouth
Alphin Brook, Alphington, Belmont, Central Exeter, Cowick Street, Exwick, Heavitree, Longbrook, Midway Terrace and Ide Lane, Mont Le Grande, Pennsylvania, Princes Square, Riverside, Southernhay and The Friars, St. David's, St. Leonard's, St. Sidwells, Taddyforde, Topsham
Bampton, Bradninch, Crediton, Cullompton, Cullompton, Halberton , Tiverton, Upton Hellions, Willand , Yeoford, Sampford Peverell
Barnstaple - Ebberly Lawn, Barnstaple Town Centre, Bickington, Croyde, Fremington, Fremington Quay, Georgeham, Ilfracombe, Lake, Mortehoe, Newport, Pilton, Rumsam, Putsborough, South Molton, Woolacombe
Adelaide Street/Clarence Place, Barbican, Devonport, Ebrington Street, The Hoe, Mannamead, North Stonehouse, Plympton St Maurice, Royal Naval Hospital/Millfields, Stoke, Stonehouse Peninsula, Tamerton Foliot, Turnchapel, Union Street
Ashprington, Berry Pomeroy, Cornworthy, Ermington, Modbury, Newton Ferrers, Noss Mayo, Salcombe, Stoke Fleming, Stoke Gabriel, Strete, Totnes, Tuckenhay, Yealmpton
Bovey Tracey, Chudleigh, Dawlish, Forde Park, Newton Abbot, Ringmore, Teignmouth, Wolborough
Abbey Road, Babbacombe Downs, Barton, Belgravia, Cary Park, Cockington, Chelston, Maidencombe, Old Paignton, Polsham, Roundham and Paignton harbour, Shorton, St Marychurch, Torre, Tormohun, Torquay Harbour, Upton, Warberries, Watcombe Park
This is a list of the conservatiuon areas - I have yet to find much on the sources of the appraisals.
Appledore, Ashreigney, Beaford, Bideford, Bideford Clovelly Road, Bideford East, Bradworthy, Buckland Brewer, Bucks Mills, Clovelly, Dolton, Great Torrington, Hartland, High Bickington, Holsworthy, Kingscott, Merton, Northam, Sheepwash, Winkleigh
West Devon (from this source)
The reports are part of council minutes and do not appear to be collected.
Bere Alston, Bere Ferrers, Bratton Clovelly, Bridestowe, Broadwoodkelly, Buckland Monachorum, Exbourne, Eworthy and Germansweek, Hatherleigh, Lamerton, Lifton, Milton Abbot, Milton Combe, Northlew, North Tawton, Okehampton, Sampford Courtenay, South Tawton, Stowford, Tavistock x3, Tavistock/Bere Alston Railway, Whitchurch and Weir Quay