Office Administrator / Estimating Administrator – Plumbing & Maintenance Location: NW11, London Salary: £28,000–£35,000 per year Job Type: Full-time, Permanent Working Hours: 8:00 to 17:00 Job Description We are looking for a reliable, organised and detail-oriented Office Administrator / Estimating Administrator to support the daily operations of a busy plumbing, heating and property refurbishment business. This is a varied office-based role covering general administration, invoicing, quotations, pricing updates and business support. The successful candidate will help keep office operations organised and ensure that pricing, financial records and job-related paperwork are maintained accurately. The role focuses on supporting existing operations and pricing processes rather than preparing competitive tenders. Key Responsibilities - Managing general office administration, data entry, emails and telephone enquiries. - Preparing and amending quotations using existing pricing lists, templates and agreed rates. - Maintaining and updating pricing lists and supplier costs. - Preparing and processing invoices, purchase orders and other financial paperwork. - Checking invoices, costs and figures for accuracy. - Tracking outstanding invoices and following up on overdue payments. - Maintaining accurate customer records, job files and administrative documents. - Liaising with customers, suppliers, plumbers, engineers and subcontractors. - Supporting job scheduling and coordinating appointments where required. - Assisting with general business administration and keeping records up to date. Requirements - Previous experience in office administration, accounts administration, estimating administration or a similar role. - Good Microsoft Office skills, particularly Excel and Outlook. - Strong numerical skills and attention to detail. - Excellent written and spoken English. - Good organisational, communication and time-management skills. - Ability to manage multiple tasks, work independently and meet deadlines. - Experience with quotations, invoices, pricing lists or purchase orders is an advantage. - Experience in plumbing, heating, construction or property maintenance is desirable but not essential