Crownmark Construction
Grantham
Checkatrade member since January 2026
Services
- Repointing
- Brickwork
- Emergency Bricklayer Service
- Agricultural Building
- Basement / Cellar Conversions
- Brick / Concrete Structural Repairs
- Car Ports
- Cladding
- Concrete Garages
- Concreting
- Core Drilling
- Demolition
- Emergency Builder Service
- Equestrian Stable
- Extensions / Conversions
- Fire and Flood Renovation
- Foundations
- Garage Conversions
- Garden Studios
- General Building
- Loft Conversions
- Mastic Sealant
- Partition Walls
- Refurbishments
- Suspended Ceilings
- Sustainable Construction
- Wall Tie Replacements
- Warehouse Racking
- Workshop Design / Construction
- Heritage Property Specialist
- Repair and Listed Building Specialist
- Damp Investigation
- Damp Survey
- Dry Rot Treatment
- Emergency Damp Proofing Service
- Mould Control
- Penetrating Damp Treatment
- Rising Damp
- Structural Water Proofing
- Woodworm Treatment
- Timber Treatment
- Asphalt Roofing Installation
- Asphalt Roofing Repair
- Chimney Cowlings Installation
- Chimney Cowlings Repair
- Chimneys Installation
- Chimneys Repair
- Dormer / Roof Windows
- Dry Ridge Installation
- Dry Ridge Repair
- Dry Verge Installation
- Dry Verge Repair
- Emergency Roofing Service
- Felt Roofing Installation
- Felt Roofing Repair
- Fibre Glass Roofing Installation
- Fibre Glass Roofing Repair
- Flat Roofing Installation
- Flat Roofing Repair
- Green Roofing Installation
- Green Roofing Repair
- Hot Melt Roofing Installation
- Hot Melt Roofing Repair
- Leadworks Installation
- Leadworks Repair
- Liquid Plastic Roofing Installation
- Liquid Plastic Roofing Repair
- Metal Roofing Installation
- Metal Roofing Repair
- Moss Removal
- Pitched Roofing Installation
- Pitched Roofing Repair
- Polycarbonate Roofing Installation
- Polycarbonate Roofing Repair
- Ridged Tiles Installation
- Ridged Tiles Repair
- Roof Inspection Report
- Roof Lights Installation
- Roof Lights Repair
- Roof Replacement
- Roofing Repairs
- Rubber Roofing Installation
- Rubber Roofing Repair
- Sealoflex Roofing Installation
- Sealoflex Roofing Repair
- Single Ply Membrane Roofs Installation
- Single Ply Membrane Roofs Repair
- Slate Roof Installation
- Slate Roofer Repair
- Slate / Tiled Roofing Installation
- Tiled Conservatory Roof Installation
- Tiled Conservatory Roof Repair
- Warm Roof Construction
Customer Reviews
Write a review10 /10
Based on 6 reviews over the past 12 months
Quality of work
10
Reliability
10
Communication
10
Reviews (6)
10 A great bunch of guys.
Posted 6 days ago
We requested a front porch plastic pillar to be replaced by a brick one. The team came out promptly were extremely polite and did a fantastic job. Cleaned up the area and at a competitive price. There were a couple of other jobs I mentioned that needed doing and they completed those as well. An additional cost but again quality work from the team. A great bunch.Verified reviewerJob location: NG3110 Brickwork repair
Posted 19 January
The Guys responded promptly to our request to quote and then arrived a week later to complete the job. We needed a brickwork pillar repairing and they did the job efficiently and quickly, finishing in about 5 hours. They cleared up all the waste material and washed down the car park, so we were well pleased with the work they did. I would certainly recommend themVerified reviewerJob location: NG12- AAiza B
10 Cellar damp proofing, sealing holes in the wall bricks, adding lead flashings to the roof
Posted 12 January
Jordan did an excellent job in carrying out cellar damp proofing, sealing brick holes in the wall, adding lead flashings to the ceiling, cladding and sealing fireplace. He is very knowledgeable and went above and beyond in explaining the root cause of the issues and fixed them to a high quality and standard. Jordan took time to explain everything in detail and risks before carrying out the work. I would highly recommend Crownmark Construction. 10/10Verified reviewerJob location: NG7 10 Highly recommend
Posted 07 January
We chose this company from recommendation. I am so pleased we did. They were so professional , friendly and extremely knowledgeable. Great lads and a job finished to the highest standardVerified reviewerJob location: NG3110 Excellent craftsmanship and very easy to work along with
Posted 07 January
From the begging of the job I couldn't have asked for better support and communication, very punctual and always kept the working area tidy and well maintained, there was a few changes i wanted once the build had started and they was more than compliant to work with me to how I visioned. Very polite and very understanding. I couldn't have wished for a better experience and I am so very happy with my work carried out. After the job was complete they was sure to keep in contact and pop in to make sure I was completely satisfied. I couldn't thank them enough im over the moon.Verified reviewerJob location: NG3110 Outstanding
Posted 07 January
Job location: NG31We’re absolutely thrilled with our new porch. The team was professional, punctual, and communicated clearly throughout the entire process. The workmanship is excellent and the finished result looks even better than we expected. Everything was completed on time and left clean and tidy. Highly recommend this company to anyone looking for quality construction work.Response from Crownmark Construction
Hi Jemma. Thank you so much for the review, we are pleased you are still thrilled. 👑
Photos
Company Info
Owner
Mr Bernard Mcdonnell
Sole Trader
Member since 2026
VAT Registered
No
Crownmark Construction is a trusted building company specializing in high-quality home extensions, with over 15 years of hands-on experience delivering exceptional results.
We take pride in transforming homes by creating beautifully designed, practical spaces that add real value and enhance the way our clients live.
From initial consultation through to completion, we offer a fully managed service built on clear communication, skilled craftsmanship, and attention to detail. Our experienced team works closely with each client to ensure every extension is completed on time, within budget, and to the highest standards.
At Crownmark Construction, we believe your home deserves nothing less than quality you can see and reliability you can trust.
Whether you’re looking to expand your living space, add a new room, or modernize your home, we are committed to delivering results that stand the test of time.
Accreditations and awards
This trade passed up to 12 Checkatrade vetting checks
Member since January 2026
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