Business Details
Emergency
services
Your Trusted Partner for Construction & Drainage Solutions
Established to deliver comprehensive infrastructure solutions, Semilong Services has evolved into a multidisciplinary group offering drainage, civil engineering, roofing, and construction services. Our strategic restructuring in 2024 created The Semilong Services Group, enabling specialized delivery across sectors while maintaining rigorous quality standards. With technical expertise in drainage interventions, from emergency unblocking to preventative maintenance, and capabilities in both design-and-construct and construct-only projects, we serve residential, commercial, and public sector clients. Our civil engineering division addresses major infrastructure challenges in rail, water, energy, and urban development, while our roofing team provides certified solutions across Northamptonshire and surrounding counties.Backed by CHAS Elite, Safe Contractor, and Constructionline accreditations, we combine innovation with practical execution, prioritizing sustainability and community impact. Our decade-plus local experience in roofing, supported by workmanship guarantees and premium materials, demonstrates our commitment to resolving complex challenges efficiently. Through technical excellence and client-focused delivery, we create lasting value for communities and stakeholders.
Services
Drain Cleaning
Unblocking Services
CCTV Drain Surveys
Tankering Services
Drain Repairs
Flat Roofing
Pitched Roofing
Roof Repairs
Commercial Roofing
Drain Installations
Highlights and features
- We offer 24/7 emergency drainage response with rapid turnaround times
- Our roofing team has 10+ years' local experience in Northamptonshire
- We provide workmanship guarantees and extended warranties on all projects
- Our CHAS Elite and Safe Contractor accreditations demonstrate compliance excellence
- We combine innovative engineering with sustainable practices for lasting solutions
Associations and certifications
- CHAS Elite
- Safe Contractor
- PQS Certificate
- Achilles Network
- Constructionline
- Social Value Certificate
What people say
Rapid 30-minute response
Thorough problem resolution
Professional technicians
Workmanship guarantees
Sustainable solutions
Services
Drain Cleaning
Our high-pressure water jetting systems effectively flush and clean entire drainage systems, preventing blockages and maintaining optimal performance. This essential service ensures proper water flow in residential, commercial, and industrial properties while complying with environmental regulations. Regular maintenance prevents costly emergencies and extends system longevity.
CCTV Drain Surveys
Using OS19x certified crawler and pushrod systems, we conduct detailed underground assessments with Wincan reporting. This technology enables precise identification of blockages, structural issues, and root intrusions without excavation, providing cost-effective solutions and accurate repair planning for both domestic and commercial properties.
Flat Roofing
We offer comprehensive flat roofing solutions including felt, EPDM rubber, and single-ply membranes. Our certified installers ensure watertight installations with proper drainage gradients, using premium materials from reputable manufacturers. All work includes workmanship guarantees and comes with extended warranties for customer peace of mind.
Emergency Drainage
Available round-the-clock for urgent issues like burst pipes and sewage blockages, our rapid response team resolves problems within 30-60 minutes. Using modern equipment including Van Packs and Jetvacs, we handle both internal and external drainage emergencies with minimal property disruption and thorough cleanup.
Sustainable Drainage
We design and install environmentally responsible systems including soakaways, drainage fields, and treatment plants. These solutions manage surface water effectively while meeting regulatory requirements, incorporating percolation testing and compliance certifications to ensure long-term functionality and environmental protection.
People
Sean Hogan
Director
Leading strategic direction with extensive industry experience, Sean oversees operations across all Semilong Services divisions, ensuring technical excellence and client satisfaction in every project delivered.
Sully Elliot
Chief Operating Officer
Managing day-to-day operations, Sully ensures efficient service delivery across drainage, civil, roofing, and construction projects, maintaining the company's commitment to quality and timely execution.
Cahal Hurrell
Quantity Surveyor
Cahal manages project financials and procurement, ensuring cost-effective delivery while maintaining quality standards across all Semilong Services' infrastructure and construction projects.
Paul Steedman
Business Development & Transport Manager
Paul drives business growth and manages logistics operations, ensuring efficient resource allocation and strategic expansion of Semilong Services' market presence.
Carrie Harris
Customer Relations Manager
Carrie oversees client communications and service quality, ensuring exceptional customer experiences through responsive support and effective issue resolution processes.
Questions
What areas do you cover for roofing services?
We provide roofing services across Northamptonshire, Buckinghamshire, and Bedfordshire with a team of local experts.
Do you offer emergency drainage services?
Yes, our 24/7 emergency service responds to drainage issues within 30 minutes of your call.
Are your engineers certified?
All technicians hold relevant CSCS certifications and industry accreditations including CHAS and Safe Contractor.
Do you provide guarantees on workmanship?
Yes, we offer workmanship guarantees and extended warranties on all roofing and drainage projects.
Can you handle commercial drainage contracts?
We provide comprehensive PPM agreements for commercial properties, including tankering and CCTV survey services.
Do you offer financing options?
Flexible finance options are available for roofing projects to make quality services more accessible.
Reviews (4)
Lindsay Jacobs
Sep 20, 2021
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I was at a fuel station this morning , whilst waiting to pay for my diesel I was disgusted to hear the abuse directed at a female member of staff in the station. He was rude, abusive and downright offensive. I noted down your company name from the vehicle parked outside, extraordinarily dreadul advertising for your company . Should i ever need the services you provide you can be sure I will not be contacting yourselves.
Starsailor Starsailor
May 28, 2021
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Probably not a good idea to have one of your workers throw his used blue disposable gloves onto the ground at a petrol station from his company van. Doesn't give off the best image.
Maria Boehm
Aug 15, 2020
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Positive:Professionalism,Punctuality,Quality,Responsiveness,Value
Shaun and his team are always very professional and friendly. We have used them on a number of occasions including this morning when two of his team came out and sorted a drain blockage we had. Within an hour an a half of calling they had sorted out the problem very quickly. Thank you.
Shaun and his team are always very professional and friendly. We have used them on a number of occasions including this morning when two of his team came out and sorted a drain blockage we had. Within an hour an a half of calling they had sorted out the problem very quickly. Thank you.
Smiley
Nov 10, 2019
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Avoid! This company is very unreliable when your in need of a job doing. They seem to be very selective as to which jobs they undertake too and rather than telling you they don't want to do the job, they say they will contact you in regards to time/date etc. then just not contact you! Appalling service. If you want someone reliable, DO NOT opt for these lot! It will be a complete waste of your time.
