| Name | Location |
|---|
| O and M Finishes | 44 congress road, London, Greater London |
| O G Electricals | |
| O Loughlin Gas Services | St albans |
| O M S Electrical | Colchester |
| O W Plumbing & Heating | Birmingham |
| O'Brien Heating and Plumbing Services | Liverpool |
| O'Connor & Co Removals Limited | O'connor And Co Removals Ltd, Callywhite |
| O'Donnell Plumbing and Heating | Glasgow |
| O'flynn Carpentry & Joinery | Croydon |
| O'Neill Plasterers | Clydebank |
| O'Neill's Roofing | Colne |
| O'Neills Fencing & Gardening Services | London |
| O'Rileys Autos Mobile Mechanic | Biggleswade |
| O'Sullivans Roofing Services | London, Greater London |
| O-One Cleaning Services | Swindon |
| O-P-M Building services | Wallingford |
| O. Karpovych | Cambridge |
| O.D Roofing Services | 3 Gibson Close, Chessington, London, Sur |
| O.D.C Heat | Littlehampton |
| Oak Apple Landscapes | Whitstable, Whitstable, Kent |
| Oak Builders Ltd | New Malden |
| oak carpentry projects lancs ltd | Oldham, Lancashire |
| Oak Hill Joinery Ltd | Pulloxhill, Bedfordshire |
| Oak Homes Joinery Ltd | Axminster, Devon |
| OAK Plumbing and Heating | Colchester |
| Oak Tree Electrical | Catbrook |
| Oak Tree Renovations Ltd | Cheltenham |
| Oakdene Auto's Limitied | Cranes Close, Basildon, Essex |
| Oakdene Heating Ltd | St Albans |
| Oakenshield Construction Ltd | Wisbech |
| Oakenstone Design Planning Build | Matlock |
| Oakey & Son Limited Electrical Services | 1 Station Villa, High Street, Blakeney, |
| Oakfit ltd | Darlongorn |
| Oakham Garden Services | Turvey, Bedfordshire |
| Oakland Carpentry | Unit 1 Fould Farm, Leek Frith, Leek |
| Oaklands Tree Specialists Ltd | St Albans, Hertfordshire |
| Oaklands Tree Specialists Ltd. | St Albans, Hertfordshire |
| OAKLEIGH GB LIMITED | Gloucester |
| Oakleigh Heating Ltd | Dobbins Lane, Wendover, Aylesbury |
| Oakley Builders (Leeds) Ltd | Leeds |
| Oakley contracts | Belfast |
| Oakley Electrical Contractors Ltd | 26 Wistaria Close, Newport |
| Oakley plumbing and heating solutions | Derby |
| Oakmont Roofing | Radstock |
| Oakmoor Heating Ltd | Twickenham |
| Oakmore Builders Limited | Orpington, Kent |
| Oakmore Contracts | Magherafelt |
| Oakston Solutions | 8 dickens way, yateley, Hampshire |
| Oaksure Construction | Croydon |
| Oaktree Landscaping | Bridgwater |
| Oakvale Kitchens & Wardrobes | Maidstone, Kent |
| Oakwater Interiors | Cardiff, Vale of Glamorgan |
| Oakwood Bespoke Joinery | Old Icknield Way, Benson, Oxfordshire |
| OAKWOOD HOME SOLUTIONS | Dalkeith |
| Oasis Plumbing and Heating | Gosport |
| Oasys Property Solutions | 96 Hampton Road, Redland, Bristol |
| OBC Building and Construction | 1 Bromley lane, Chislehurst, Kent |
| Obe & Co Design Ltd | THE OLD DAIRY, Manor Court Farm, Tunbridge Wells, Kent |
| Obespoke & Obbard Design & Development | The Yacht Club, Chelsea Harbour, Chelsea, Greater London |
| Obi Building Services | London |
| Obi gas | Bridport |
| Obsidian Interiors | Obsidian Kitchens and Bathrooms, 41- 47 Fairview Rd, Cheltenham, Gloucestershire |
| Obtain Electrical Services | Torquay |
| OC Security | Woking |
| OCC Construction | Gateshead |
| OCD Plastering | Warwick |
| OCD Services Kirklees Ltd | Huddersfield |
| Ocean Bathrooms and Kitchens | 28 Avery Close, Warrington, Cheshire |
| Ocean Plasterers Ltd | London |
| Ochiltree Bespoke Joinery Ltd | Hexham, Northumberland |
| Ochilvale Engineering Ltd | stirling |
| Octagon Construction Ltd | Rhyl |
| Octopus Plumbing | Mitcham |
| Octopus Services Ltd | Wakefield |
| Odm decorators | Bromley |
| ODML | London |
| Odriscoll Gas and Plumbing | Portsmouth |
| ODS Plumbing & Heating | Sheffield |
| OEB Building Service Ltd | Wickford |
| Ofcourse Plasterers Painters and Decorators | Jedburgh |
| Off The Rock Landscaping Ltd | Edinburgh, Midlothian |
| Offa Construction Ltd | Wolton on Thames, Surrey |
| Offcuts Ltd | Suite 6, 206 New Road, Rickmansworth, Hertfordshire |
| Offen Heating | Hailsham |
| Office Removals London | 33 Lurline Gardens, Battersea, Greater London |
| OGDEN CONSTRUCTION & LANDSCAPE | Manchester |
| Ogden Electrical Services Ltd | Eastbourne |
| Ogee Restorations | Cleethorpes |
| OH Tree Services | Hedgehog Cottage, Hazelrigg Lane, Bridge, Ulverston, Newby Bridge, Greater London |
| OHM Gas Heating and Plumbing Ltd | |
| Ohms Electrical Contracting Ltd | Seddul Bahr Industrial Estate, Southampton, Hampshire |
| Ohmz Electrical | Nuneaton |
| Oico Home | London, Greater London |
| Oil Heating Specialist | Scarborough |
| OIS Removals Limited | Unit 61 Wimbledon Stadium Business Centr |
| OJ Carpentry | Hook |
| OJS Electrical | King's Lynn |
| OJS ostlers joinery services | kingston upon hull |
| Ok custom clean | Slough UK |
| Okram Locksmith | Manchester |
| OL AND EDWARD LTD | 142 Cromwell Road, London |
| Old City Carpentry and Construction | Margate |
| Old English Tiling | The Ridgewaye, Tunbridge Wells |
| OLD WORLD PLASTERING | Leathehead |
| Olde English Tiles | Olde English Tiles, Rawmec Business Park, Plumpton Road, Hoddesdon, Hertfordshire |
| Oldfield Bathrooms and Kitchens Limited | 82 Bury New Rd, Bolton, Lancashire |
| Oldfield Construction | London, Greater London |
| Oldfield's Gas & Plumbing | Worksop |
| Oldham Aerials and Security | Oldham, Greater Manchester |
| Oldham Cleaning Co | Oldham |
| Oldham Roofers | Oldham, Lancashire |
| Oldwest Maintenance Ltd | Neasden |
| Olea Landscapes Ltd | London, Surrey |
| Olegs Decorating | |
| OLI HOME IMPROVEMENTS | Gerrards Cross |
| Oli-Gas | Manchester |
| OliGas Ltd | Porthcawl |
| Olimpiu Balaban | Edgware |
| Olimpiu Carp Petrache | London |
| Olive Roofing & Property Maintenance Limited | Wellingborough |
| Oliver Barton Plumbing and Heating | Bristol |
| Oliver Brooks | Lancing |
| Oliver Hale Electrical Ltd | London |
| Oliver Hazael Bespoke Carpentry and Plastering | 11 Charlcombe Way, Bath, Somerset |
| Oliver James Gardening Company | Twickenham, Greater London |
| Oliver James Landscapes | Church Road, Northwood, Middlesex |
| OLIVER LITA CONSTRUCTION LTD | London |
| Oliver Pro Maintenance | London |
| Oliver Russell Electrical Ltd | Unit 3 Cadwell Lane,, Hitchin, Hertfordshire |
| Oliver Stacey Painter & Decorator | Thames Ditton |
| Oliver Wild Ltd | 9 Moor Valley Close, Sheffield |
| Ollie Roofing & Building Contractors | Campsie View, Annathill, Coatbridge, North Lanarkshire |
| Ollie's Lock & Safe Locksmiths | Cheltenham |
| OLS Gardening Services | Oldham |
| Olympia interiors | Clophill |
| Olympia Removals Birmingham | Blackthorn House, St Paul's Square, Birmingham, Birmingham, West Midlands |
| Olympia Removals Leicester | 6 St George's Way, Leicester, Leicestershire |
| Olympia Removals Nottingham | City Gate East, Tollhouse Hill, Nottingham, Nottinghamshire |
| Olympia Removals Southampton | 15 Rockstone Pl, Southampton, Hampshire |
| Olympian Water Gardens | 18 Lower bank, Denton, Manchester, Lancashire |
| Olympic Plumbing & Heating | West Huntspill |
| Olympus Construction Services LTD | 15 Loscombe Meadow, North Curry, Taunton, Somerset |
| OLYNPAIDD M & E 2008 LTD | Barry |
| OMEGA ELECTRICAL | Witney |
| Omega Electrical Engineering Services | Famet Close, Purley, Surrey, |
| Omega Electrical Services | London |
| Omega Group | Northolt |
| omer_faruk47 | Glasgow |
| OMG Plumbing and Gas | Harrow |
| OMJ Property Services Ltd | PORTSMOUTH |
| OML Plastering | |
| Omniform | No.1 Royal Exchange, London, Greater London |
| Omniscient Building Service Ltd | Southall |
| Omnivolt Electrical Services | Tillybody |
| Omurca Ltd | Edenbridge |
| On | Harrow |
| On The Go Removals | Unit 20, Midway Business Centre, Clay Cross, Chesterfield, Derbyshire |
| One 4 All Cleaning Services | bournemouth |
| One Call Cleaning and Gardening Ltd | Kent |
| One Call for Plumbing, Heating & Gas | Nuneaton |
| One Call Gas Services ltd | CANTERBURY |
| One Construction & Interiors Ltd | Rockwood, Great Missenden, Buckinghamshire |
| One Goddons Electrical Services | 12c Railway Road, Downham Market, Norfolk |
| One L Building Services | London, Greater London |
| One Point Services Ltd | London |
| One Removal | Hidcote Gardens, London, Greater London |
| One Sterling Carpentry & Building Services | Suite 6, Websters Court, Rayleigh, Essex |
| One Stop Joinery Ltd. | Caldyne Park, Wallage Lane, Rowfant, West Sussex |
| One Stop Worktops Ltd | Stockport, Cheshire |
| One Will Electrical and Building | London |
| One2 lofts & extensions ltd | Ilford- seven kings |
| OneElectricalmk | Milton Keynes |
| OneHeat | Barnsley |
| Oneill gas | Mexborough |
| OneOak Landscapes | Billericay, Essex |
| Onesto Heating Services | Chineham |
| Onestop gas | Newcastle |
| OnFlo - Plumbing & Heating Services | |
| Ongas | Woodchester |
| Ongas Guildford Ltd | Woking |
| Online Payment Service Tax | Clinton, Londonderry |
| Online Windows | LANCASTER |
| Online Worktops | North West, Cheshire |
| Only Development Company Ltd | Bromley |
| Only Lifts Ltd | Bexhill-on-Sea, East Sussex |
| ONN building ltd | Edgware |
| OnPoint Roofing & Building Ltd | London, Greater London |
| Onsite Contractors & Plumbing Ltd | London |
| Onstruction Ltd | London |
| Ontrack Computers LTD | Ontrack Computers Ltd, Unit 23 Monkspath |
| ONYX Heating & Plumbing | |
| Onyx Iv | London |
| Open Mind Building Services Ltd | Bushey |
| Open Removals | Market Drayton |
| Open Space London | London, Greater London |
| Open-In Security | Ickenham, Uxbridge |
| Optimal Comfort Plumbing and Heating | Chessington |
| Optimised Heating | Raasay, Henley Lane, Kingsdown, Corsham, |
| Optimum Building Solutions Ltd | Bognor Regis |
| Optimum Home Electrics | Telford |
| Optimum Plastering | Chalfont St Peter |
| Optimum plumbing ltd | Doncaster |
| Options Home Extensions | Bicester |
| Optma Builders ltd | 25 Endersby Road, Barnet |
| OR Plumbing | Kidderminster |
| Orange Fox Electrical Ltd | Foxes Office, Foxes Meadow, Reepham Road, Guestwick, Norfolk |
| Orbit Builders Service | LONDON |
| Orbital Gas Services Ltd | London |
| Orbital Gas Services Ltd. | 40 Willoughby Road, London, Greater London |
| Orchard Building Services | leominster, Herefordshire |
| Orchard Carpentry | Surbiton |
| Orchard Electrical | Portsmouth |
| Orchard Electrical Services | Crediton |
| Orchard Services Ltd | Broadstairs |
| Orchestrate | 53 Webb's Road, London, Greater London |
| Origin Construction Limited | London, Surrey |
| Original Features Restorations Ltd | 155 Tottenham Lane, London, Greater London |
| Original Landscapes | SHERBORNE, Dorset |
| Original Pathways and Sons Limited | Isleworth |
| Original Style | Sowton Industrial Estate, Falcon Road, Exeter, Devon |
| Oro Projects | 13 Radnor Walk, London, Greater London |
| Orr Plumbing & Heating | Larkhall |
| Orrell Electrics | Liverpool |
| Osborne & Reed Heating & Plumbing | |
| Oscar Design | Surbiton |
| Oscar Renn | Foxbank Street, Manchester, Greater Manchester |
| Oscardecorator | HP14 3Q |
| OSH Plumber and Electricians | London |
| OSHEA CONSTRUCTION LIMITED | London |
| Osiris Building Solutions | Leeds |
| Osman Plumbing & Heating Services Ltd | Hounslow |
| Oswestry and Wrexham Roofing Services | 1 The Old Shop, High Street, Weston Rhyn, Oswestry, Shropshire |
| OT Locksmiths & Carpentry | Coventry |
| Otec Gas and Plumbing Services Limited | Barnet |
| Other | London |
| OTIS Electrical Solutions | London |
| Otter Electrical Services | Budleigh Salterton, Devon |
| Otters Group Ltd | London |
| Otto & Mensah Build | 15 Lambs Conduit Street, London |
| Otto Tiles & Design | London, Greater London |
| Our Builders Ltd | London |
| Ouse Valley Land Care Specialists | |
| Out the Box Removals | Brighton, East Sussex |
| Outdoor Creations | The Old Stables Office, Coney Lodge Farm, Park Farm Road, Birling, West Malling, Kent |
| Outer London returns | Erith |
| Outwood Interiors | Wakefield |
| Outwood Smart Home | 12 Alexander Drive, Bury, Greater Manchester |
| Oven Busters | Christchurch |
| Oven Clean Pristine | Barnsley |
| Oven Cura | Bradford |
| Oven Sheen Ltd | Office 5 c/o Access Self Storage Ltd Un |
| Oven Shiners Limited | Whyteleafe |
| Ovenclean | Wickford |
| Ovens n more cleaning services | Waterlooville |
| Ovenu | Sutton |
| Overcomewithemulsion.com | 8 roebuck park, Alcester, Warwickshire |
| Overlay | Swanmore, Hampshire |
| OVERTON ELECTRICAL SERVICES LTD | Mansfield |
| OVOLO DESIGN | Enfield |
| Owen Roberts Decorating | LONDON, Greater London |
| Owen Savage Painters | Luton |
| Owen Van Services | London, Greater London |
| Owen Williamson | Barrow In furness |
| Owl Carpentry & Joinery | telford |
| Own Business | Southall |
| Own Removals & Storage | Kingston |
| Ox Construction | Lincoln |
| Ox Roofing Services | Darwen |
| Oxbridge Plumbing and Building | Mafeking, Weirs Orchard, Weirs Lane, Oxf |
| Oxenham's Paving & Landscaping | Exeter, Devon |
| Oxford Gas Maintenance | Oxford |
| Oxford Man and Van | Oxford, Oxfordshire |
| Oxford Prestige Painting & Decorating | Kidlington |
| Oxford Removal Company | Horspath Industrial Estate, Peterley Rd, Oxford, Oxfordshire |
| Oxford West | London |
| Oxford's Absolute Gardening | Cambridge Terrace, Oxford, Oxfordshire |
| Oxfordshire Decorating Services | 21 Woodcote Road, Bicester, Oxfordshire |
| Oxfordshire Removals Man and Van Services | Oxford, Oxfordshire |
| Oxley Electrical Contractors Ltd | Milton Keynes |
| Oxon maintenance solutions ltd | Oxfors |
| Oxus Ltd | London |
| Oz Joinery & Property Services | Bideford |