What We Do
Our Services
From home extensions and renovations in Sunderland to large-scale commercial developments across the North East, we bring the same precision and commitment to every project.
Built for Every Scale
Pro-seal Developments has been delivering quality construction across Sunderland and the North East for over 20 years. Whether you're extending your property, renovating your home, or developing a commercial site in the region, our experienced team manages every stage — from initial planning through to final handover.
Renovations & Extensions
Transform your Sunderland property.
We breathe new life into existing homes across Sunderland and Tyne and Wear through full renovations, rear and side extensions, loft conversions, and kitchen or bathroom refits. Our team works around your schedule to minimise disruption while delivering a transformation that adds lasting value.
- Rear and side extensions
- Loft conversions
- Full property renovations
- Kitchen and bathroom refits
- Structural alterations
- Internal reconfigurations
Garage Conversions
Add living space without moving house.
A garage conversion is one of the most cost-effective ways to add usable space to your home. Pro-seal Developments manage the entire process across Sunderland and the North East — from structural assessments and insulation to plastering, electrics, flooring, and a full professional finish. Whether you want a home office, gym, playroom, or extra bedroom, we'll deliver it on time and on budget.
- Full structural assessment and planning
- Insulation and damp-proofing
- Plastering and internal finishes
- Electrical first and second fix
- Flooring installation
- Windows, doors, and ventilation
Project Management
Expert oversight from start to finish.
Not every client needs a full build — some need an experienced hand to manage their existing contractors and keep a project on track. We offer standalone project management services, acting as your on-site representative to coordinate trades, manage programmes, and protect your interests.
- Programme planning and scheduling
- Contractor procurement and management
- Cost monitoring and reporting
- Quality inspections
- Client liaison and reporting
- Handover and snagging
Joinery
Crafted to fit. Built to last.
Our skilled joiners deliver bespoke joinery for residential and commercial projects across Sunderland and the North East. From fitted kitchens and staircases to doors, windows, and custom furniture, every piece is crafted with precision and finished to the highest standard.
- Bespoke fitted kitchens and wardrobes
- Staircases and balustrades
- Internal and external doors
- Window frames and sills
- Skirting, architrave and mouldings
- Custom furniture and shelving
Plumbing
Reliable plumbing, done properly.
Our qualified plumbers handle everything from full bathroom installations and boiler connections to drainage and leak repairs across Sunderland and the North East. All work is carried out to current building regulations and signed off correctly.
- First and second fix pipework
- Bathroom and en-suite installations
- Kitchen plumbing and appliance connections
- Boiler and heating system connections
- Soil and waste drainage
- Leak detection and repairs
Floor Fitting
Every floor, fitted right.
Our experienced floor fitters install all types of flooring for residential and commercial projects across Sunderland and the North East. From hardwood and engineered timber to laminate, LVT, and ceramic tiles — every floor is prepared, laid, and finished to a professional standard.
- Hardwood and engineered timber
- Laminate and LVT / vinyl plank
- Ceramic and porcelain tiles
- Carpet fitting and underlay
- Subfloor preparation and levelling
- Skirting and threshold trims
How We Work
A clear, structured process — so you always know what's happening and what's next.
Initial Consultation
We meet to understand your project, your goals, and your budget. No obligation, no pressure.
Detailed Quote
We provide a clear, itemised quote within 5 working days. No hidden costs or vague estimates.
Planning & Design
We handle planning applications, structural drawings, and all pre-construction coordination.
Build Phase
Our team gets to work. You receive regular progress updates and have a dedicated point of contact throughout.
Handover
We complete a thorough snagging process before handing over — ensuring everything is exactly as agreed.
Ready to discuss your project?
Get in touch for a free, no-obligation consultation. We'll get back to you within 24 hours.