Home Additions
An addition is two buildings learning to behave as one. The new foundation, framing, roofline and systems all have to meet a house that is already standing, already settled, and already carrying load. That junction is where additions succeed or fail.
Most people describe an addition by the room they want. A bedroom over the garage. A bigger kitchen. A primary suite off the back. That is the outcome, and it is the easy part to agree on.
The build is a different conversation. New square footage has to be carried by new foundation, and that foundation has to sit beside one that was poured decades ago and has already done its settling. The two will never move identically. What stops that difference from showing up as a cracked seam over the doorway is how the connection is detailed — and that gets decided early, on paper, not on site.
What we look at before quoting
The first question is not design, it is whether the house and the lot permit what you have in mind. Setbacks, easements and lot coverage decide the footprint. The existing structure decides whether a second story is realistic or whether the walls below would need reinforcing first. A roofline that is straightforward to tie into on one elevation can be genuinely awkward on another.
We measure the existing structure rather than working from the original plans. Houses are rarely built exactly as drawn, and an addition detailed to the drawings instead of the building is how you end up with a threshold that is three-quarters of an inch out.
The parts you will never see
Footings go below the frost line — in this region that is not a detail to economize on, because a shallow footing in expansive soil will move with the seasons and take your drywall with it. Drainage gets tied into what the house already has, so the addition is not quietly redirecting water at your existing foundation.
At the wall, the weather-resistive barrier from the new construction laps into the existing wall assembly rather than butting against it. At the roof, the new valley is flashed and papered before any shingle goes on. These are the details that decide whether the addition is dry in ten years.
Systems are usually the surprise
Adding conditioned square footage means the electrical service and the HVAC system are both being asked to do more than they were sized for. Sometimes the existing panel has the capacity. Often it does not, and a subpanel or a service upgrade belongs in the scope from the start rather than appearing as a change order in week six. We run the load calculation early so that cost is a known number in your bid.
Matching the existing house
An addition that is obviously an addition is a resale problem. Siding profile, trim dimensions, window proportion, roof pitch and paint all get matched to what is there. Where an exact match is no longer manufactured, we will tell you that during scoping and show you the closest available option, rather than letting you discover the difference once it is installed.
What an addition actually involves.
Every line below is scoped and priced before work starts. If something isn't on your bid, it isn't in your price.
- Site review and measure-up of the existing structure before anything is drawn
- Structural engineering and stamped drawings where the span or load requires it
- Permit application and inspection scheduling with El Paso County or the City
- Excavation and new footings placed below the local frost line
- Foundation wall, damp-proofing, and drainage tied to the existing system
- Floor framing keyed into the existing rim, with a level transition at the threshold
- Wall framing, sheathing, and a weather-resistive barrier lapped into the existing wall
- Roof framing tied into the existing rafters or trusses, valleys flashed and papered
- Electrical load calculation, and a panel or subpanel upgrade if the service cannot carry it
- HVAC load review — new square footage rarely runs off the existing system unchanged
- Insulation, air sealing at the old-to-new junction, drywall, texture and paint
- Exterior siding, trim and paint matched to the existing elevation
Scope it. Bid it. Build it.
The same three stages on every project. Here's what each one means for home additions.
Scope it
We walk the house, measure what is there, and establish what the lot, setbacks and structure will actually allow. You get a scope and a number before any drawing is paid for.
Bid it
The junction between old and new — foundation, roofline, panel capacity, HVAC sizing — is priced explicitly. That junction is where additions succeed or fail, and it is where a vague bid hides its risk.
Build it
The work in the order that puts the hidden things first, because those are the ones that are expensive to revisit.
- Excavation, footings below frost line, foundation wall, and drainage. The new floor is set so the finished transition between old and new lands flush underfoot.
- Electrical load calculated and the panel upgraded if it will not carry the addition. HVAC sized for the new volume. Plumbing run before anything closes up.
- Insulation and air sealing concentrated at the old-to-new junction, then drywall, trim, flooring and paint matched to the rooms it opens onto.
- Final inspections signed off, punch list walked with you, and the exterior siding and trim closed out so the addition reads as original.
An addition is the least forgiving thing you can build.
Get the tie-in wrong and you find out through a cracked drywall seam two winters later. Get it scoped properly and it reads as though the house was always this size.
Other work we scope.
Basement Renovation
Turn unfinished square footage into living space — egress, framing, insulation, and a floor that stays dry.
Deck & Patio
Outdoor structures built for Colorado freeze-thaw — footings below frost line, flashed ledgers, joists that stay flat.
Kitchen Renovation
Layout, cabinetry, counters and lighting, with the plumbing and electrical moved to match the new plan.
Bathroom Renovation
Waterproofing first, finishes second — the order that decides whether a bathroom lasts twenty years or five.
Flooring
Hardwood, LVP, tile and carpet over a subfloor that's been flattened and checked for moisture first.
Carpentry
Trim, built-ins, doors and stairs — scribed to the walls you actually have, not the ones the plans assumed.
Interior Finishing
Drywall, texture and paint taken to a finish that survives raking light across a long wall.
Get a scoped bid for your home additions.
Tell us what you're planning and we'll come back with next steps.
Call or Text(719) 654-6663
Emailadmin@allseasonimprovements.com
Service AreaColorado Springs, CO & surrounding communities