• 1. Building Permit Application Requirements

    Building Permits are reviewed for compliance with:

    ● Ontario Building Code
    ● Hamilton's Zoning By-law
    ● Niagara Escarpment Commission and Conservation Authorities Regulations
    ● Other applicable provincial and municipal regulations

    The purpose of a Building Permit is to ensure that zoning requirements, fire and structural safety standards and other building standards are met.

  • 2. Projects that require a building Permit


    ● guard/railing replacement or new installation
    ● fences for swimming pools (enclosures)
    ● tent(s) greater than 60 square metres
    ● any-sized deck (covered or uncovered) where it is attached to a building
    ● detached uncovered deck greater than 10 square metres and more than 200 mm above adjacent grade
    ● detached covered deck greater than 10 square metres
    ● detached deck (covered or uncovered) less than or equal to 10 square metres where it is adjacent to or associated with a door to the building and more than 600 mm above grade
    ● detached structure less than or equal to 10 square metres containing plumbing
    ● detached structure greater than 10 square metres (except where accessory to a detached house, semi-detached house or row house)
    ● detached accessory structure (shed, garage, gazebo, carport) greater than 15 square metres where accessory to a detached house, semi-detached house or row house
    ● additions (includes enclosing existing porch)
    ● waterproofing/damp proofing foundation walls
    ● replacing weeping tile
    ● repairs to structural members (i.e. subfloor, roof sheathing, beams, lintels, etc.)
    ● raising or lowering (underpinning) a house to provide a full basement
    ● replacing roofing or exterior cladding with a different material
    ● solar panels
    ● ramps or elevating devices
    ● replacing structures in same size same location


    ● interior alterations including finishing or partially finishing a basement or other spaces
    ● finishing existing non-finished space
    ● walkout basement
    ● replacement of interior railings/guards
    ● adding an accessory apartment (conversion)
    ● relocating rooms/creation of new rooms
    ● material alterations including installing or replacing drywall and insulation
    ● creating new door or window openings or increasing the size of openings
    ● relocating door or window openings
    ● adding or removing walls (non-load bearing and load bearing), beams and lintels
    ● backwater valve
    ● waterproofing/damp proofing foundation walls
    ● internal weeping tile system
    ● sump pump
    ● fire damage repair
    ● changing the use of a building (e.g. lodging house, bed and breakfast or changing any part of a building from one use to another)
    ● establishing a home occupation (please contact us for more information)


    ● new plumbing or relocating plumbing
    ● new septic systems, repair or replacement
    ● installation of water meter, water, sanitary and storm services to the property line (Single Family Dwellings only)


    ● wood stoves or fireplaces
    ● new or replacement of ductwork in an HVAC system
    ● installation of internal plumbing


    ● demolitions for structures 10 square metres or greater (except for accessory structures not more than 15 square metres, as noted)
    ● partial demolitions of buildings
    ● partial demolition of an attached structure

  • 3. Modern Design Structures

Permit Application Submission

Permit Application Submission

A Building Permit legally authorizes you to start construction of a building project in accordance with approved drawings and specifications.

Based on 13 reviews
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Adam SellorsAdam Sellors
00:54 25 Oct 23
My partner and I are converting our single family home into a duplex and we were lucky enough to come across Decc. Mike has been phenomenal throughout the permit process. We were a little stressed taking on this large project, but Mike has been amazing, guiding us through the trials and tribulations that arise when working on a home built in the 1800’s. He presented great ideas during his walk through, and designed two fabulous units, easily overcoming what we thought were going to be major permit issues. Further, Mike was able to put us in contact with a construction company (555 construction) that specialize in this type of conversion. We recommended Mike to some close friends, who also conveyed a very positive experience. Thank you Mike!!!!!!!
Vanessa MilichVanessa Milich
20:47 27 Sep 23
Very professional and knowledgeable. Work was completed on time with no surprises. I would highly recommend this company to everyone.
Chris FritchChris Fritch
14:46 11 Sep 23
I have now had the pleasure of working with Mike on a number of projects and I am absolutely thrilled to have found him. His professionalism, attention to detail and knowledge is unmatched in the industry.I have worked with many engineers in the past and Mike leagues above them. Can not recommend DECC INC. enough!
Craig BeckerCraig Becker
14:22 03 Sep 23
I have now had the pleasure of working with Mike a few times and picked his brain dozens more. Simply put there is levels to this kind of stuff and Mike is at the top of his game. His ability to adjust his message from talking to city staff to contractors to home owners is impressive and you feel like you have a true partner in your project. One of the most impressive aspects of working with DECC Inc. was their ability to deliver permit on the day of closing. There was zero downtime and the team was able to get right to work.Having worked with multiple engineers in the past, there is good and bad, Mike and DECC Inc. are the best.
Stuart FletcherStuart Fletcher
01:32 24 Aug 23
We felt Mike was very open and honest from beginning by to end. From drawings to permits, to putting together the team to help us. He came recommended from a friend and he did not disappoint. We would highly recommend!!!!
Michael MonsonMichael Monson
15:42 16 Aug 23
Mike and the team at DECC Inc. were an absolute pleasure to collaborate with. They were thorough, professional and provided the absolute highest quality of customer service from commencement to completion of the additional dwelling unit within my home. DECC Inc. essentially rescued me from a previously incompetent design firm and I cannot recommend their services highly enough. If I could rate 6 stars, I would.
fam ilyfam ily
18:58 20 Jul 23
I was referred to DECC Inc. to do drawings for my duplex conversion. Mike made the process easy and seamless with the various permit applications and submissions, along with drawings for my new property conversion. Great communication throughout the entire process, with updates along the way. We had our permits in hand the day our property closed, allowing us to start the conversion immediately with no time lost (time is money). Highly recommend Mike!