| Pagoda Security | Security service | Office, King & Queen, 13 - 16 Marlborough Pl | Daily Open 24 hours |
| Papersmiths | Stationery shop | 21 Sydney St | Mon–Sat 10:00–18:00 |
| Patrick Moorhead Antiques | Antique shop | Church Street North Laine | Mon 09:30–17:30 |
| PCR test clinic Brighton | Walk-in clinic | 9 Leybourne Rd, Lower Bevendean Ave | Thu 09:00–17:30 |
| Peak Fire Safety | Fire protection consultant | Unit 1, Ferry Wharf, Basin Rd N | Mon–Fri 09:00–18:00 |
| Pedalmoore - Mobile Bicycle Repair | Bicycle repair shop | 12 Brading Rd | Tue–Fri 09:00–17:00 |
| Petra Edwards Notary Public Brighton | Notary public | Mocatta House, Trafalgar Terrace | Thu 09:00–17:00 |
| Phlorum | Environmental consultant | Unit 12 | Mon–Fri 09:00–17:30 |
| Photomatic | Photography shop | 22 Gardner St | Mon–Fri 12:00–17:00 |
| PIER Investment Management Ltd | Investment company | 161 Preston Rd | Thu 09:00–17:00 |
| Pine & Oak Shop | Home furniture shop | 23 Marshalls Row, Ditchling Rd | Mon–Fri 09:00–17:00 |
| Pioneer Childcare Holiday Activity Camp - Balfour Primary School | Children's club | Balfour Rd | Mon–Fri 15:15–18:00 |
| Players Brighton | Bar | 171-181, Kings Road Arches | Thu 12:00–23:00 |
| Portman Smile Clinic Brighton | Orthodontist | 49-50 Providence Pl | Mon 08:30–13:00, 14:00–17:00 |
| Portslade Health Centre | GP | Church Rd | Mon–Tue 08:00–18:30 |
| Portslade Hub | Government office | 6 Mile Oak Rd | Mon 09:00–07:00 |
| Premium Structural Engineering | Structural engineer | Tango 3, Maritime House, Basin Rd N | Thu 09:00–17:00 |
| Preston Insurance Brokers | Insurance broker | 8 Hollingbury Pl | Thu 08:45–17:00 |
| Preston Park Demonstration Garden | Garden allotment | 6 Preston Park Ave | Daily Open 24 hours |
| Procoal | Beauty product supplier | Westergate Business Centre, 5, Westergate Rd | Mon–Fri 09:00–17:00 |
| Projects Abroad UK | Voluntary organisation | Projects Abroad WRAP, 83 Queens Rd | Mon–Fri 09:00–17:30 |
| PSE Associates | Quantity surveyor | Rothbury House, 24 Franklin Rd | Mon 08:45–17:30 |
| Quotacom Limited | Executive search firm | Ground Floor, City View, 103 Stroudley Rd | Mon–Fri 08:30–17:00 |
| R Mouland Sewing Machines | Sewing machine repair service | 299 Bear Rd | Mon 09:00–17:00 |
| Rachel Goozee Garden & Planting Design | Landscape designer | 11 Lincoln Cottages | Mon–Fri 09:00–17:30 |
| Rand Holistics | Reflexologist | 20 Helena Cl | Mon–Fri Open 24 hours |
| RCCG Great Overcomers Parish Brighton | Pentecostal church | High School, Ladies' Mile Road Patcham | Sun 09:45–13:00 |
| RCCG Kingdom Life Assembly, Brighton a.k.a. The Achiever's Centre | Place of worship | Suite 1, Leonardo Hotel, 101 Stroudley Rd | Wed 18:30–19:30 |
| Ready Mix Concrete Brighton | Ready-mix concrete supplier | 22-23 Castle St | Thu 07:00–18:00 |
| Resident Music | Music shop | 27, 28 Kensington Gardens | Sun 10:00–17:30 |