Home additions in Centennial are reviewed by the city’s Building Division and carry more coordination than an interior remodel. The city addition guide ties the permit to site planning, egress protection, structural openings, smoke detector wiring, foundation design, and separate HOA or Civic Association requirements. Our crew plans the addition around those local checkpoints before excavation or wall removal begins.
The City Permit Does Not Replace HOA Review
Centennial’s addition guide states that the permitting process does not take the place of any Homeowner Association or Civic Association requirements. That is a common project trap. A homeowner can be moving through the city permit path while still needing separate approval from a private association.
We treat that as a parallel track, not an afterthought. The city reviews building requirements, while the association may review exterior appearance, placement, or neighborhood rules. We keep the construction schedule realistic by identifying that approval need before ordering materials or promising a start date.
Site Plans Must Show Where the Addition Lands
Centennial requires a site plan or survey showing the addition’s location relative to property lines. Utility locates must be requested through the Utility Notification Center of Colorado before excavation. Those two items shape the earliest field work because an addition changes the footprint of the house and disturbs the ground.
For the build, the site plan is not just paperwork. It guides layout, excavation limits, access, and how the new work relates to existing utilities and property boundaries. Our crew coordinates the permit drawings and field layout so the addition is placed as reviewed.
Structural Openings Can Trigger Engineering
Centennial’s addition guide says new openings greater than 6 feet in a bearing wall may require an engineered plan. That matters when an addition connects to the existing house through a large kitchen opening, family-room opening, or expanded doorway. The larger the connection, the more carefully the load path has to be documented.
We identify bearing-wall work early and do not wait until demolition exposes the framing. If the opening needs engineering, that design belongs in the plan set before the city review. In the field, the engineered opening then controls temporary support, beam installation, framing inspection, and how the old structure is tied to the new addition.
Egress and Smoke Detectors Affect the Existing House
Centennial does not allow additions to enclose or obstruct existing bedroom or basement egress windows. That rule can affect rear additions, side additions, and additions near window wells. We check existing bedroom and basement escape paths before drawing the new footprint because an addition that blocks them creates a permit problem and a life-safety problem.
Smoke detectors installed as part of an addition must be hardwired, not battery-powered. That means the addition may require electrical coordination beyond the new room itself. Our crew plans alarm wiring with the rough electrical work so the life-safety system is part of the build rather than a late correction.
Foundation Design Depends on What the Addition Spans
Centennial requires an engineer-designed foundation for additions built over a basement. That changes the design path for second-level or above-basement additions because the new loads do not simply land on fresh shallow work. The existing structure and foundation conditions have to be accounted for.
When the addition is over existing basement space, our crew coordinates the structural design before framing. That helps avoid field changes where new walls, posts, or beams do not match what the existing house can carry. The permit plan and the build sequence need to agree before the addition is opened up.
How We Sequence a Centennial Home Addition
Centennial reviews residential additions in 10 business days from complete submittal. We start with HOA or Civic Association coordination, site plan or survey, utility locate planning, egress review, structural-opening review, foundation design needs, and smoke detector wiring. After permit approval, the work moves through layout, excavation where needed, foundation or structural work, framing, rough trades, inspections, enclosure, interior finish, and final closeout.
The key in Centennial is that an addition touches both the existing home and the lot. Blocking an egress window, opening a bearing wall without engineering, or missing a separate association step can disrupt the job before the new space is useful. We sequence the work so the city permit, field construction, and outside approvals stay aligned.
Home Addition Near Centennial
Same crew, neighbouring jurisdictions. Permit rules differ by city — pick yours.
How long does Centennial review a home addition permit? Can a Centennial addition block an existing bedroom window? When does a bearing-wall opening need engineering in Centennial? Does Centennial’s permit approval replace HOA approval? Tell us where the addition would attach, what rooms it affects, and whether an HOA or Civic Association is involved. We handle the permit process and coordinate Centennial’s site, structural, and inspection requirements.
Common Questions
Residential additions are reviewed in 10 business days from complete submittal. We prepare the site and structural information before the city review starts.
No. Additions cannot enclose or obstruct existing bedroom or basement egress windows, so we check those escape paths before finalizing the footprint.
A new opening greater than 6 feet in a bearing wall may require an engineered plan. We identify that need before demolition so the permit and framing plan match.
No. The city guide states that its permit process does not take the place of Homeowner Association or Civic Association requirements.
Talk to Us About Your Project