An addition touches the foundation, the framing, the roofline, the envelope and every mechanical system, and it has to pass inspection at each stage. It is a genuinely different order of work from a kitchen remodel, and not every remodeling contractor does it well.
The questions below are the ones whose answers actually predict how an addition will go. They are specific on purpose, because general questions produce general answers.
The questions that matter, and what good answers sound like
How will you tie the new roof into the existing one? A good answer describes flashing, step detail and how differential movement between an old settled structure and a new one is accommodated. A vague answer here is the single biggest warning sign, because this junction is where additions leak.
Who does the structural engineering, and when? It should happen before a fixed price, not after. If the engineering is deferred, the price is provisional whether or not it is presented that way.
How will the existing foundation be tied to the new one? A century-old foundation and new footings settle differently. The answer should describe how that is handled rather than treating them as one structure.
What happens to the existing wall when the addition opens into the house? Whether it is load-bearing, what beam carries it, and where that load goes down to the foundation.
How will the mechanical systems be extended, and can they carry it? Extending ductwork into an addition frequently starves the rest of the house unless the system is assessed first.
What moves the price
- Structural capability. Whether the contractor does this regularly or occasionally.
- Permit and engineering handling. Whether they prepare and file the whole package or leave you to coordinate it.
- Crew composition. Whether framing, roofing and mechanical are in house or subcontracted.
- Weather planning. In this climate, whether the schedule gets the structure dried in before winter.
Mistakes we see most often
- Hiring on price without asking how the roof tie-in will be detailed.
- Accepting a fixed price before the engineering exists.
- Not asking whether the heating system can serve the additional volume.
- Starting late in the year and being caught with an open structure in an Upstate December.
What this means in the Capital Region
Weather sequencing is a genuine question here rather than a formality. An addition needs to be framed, roofed and dried in before winter closes, and a project that starts in September is making a bet. We plan addition schedules around that explicitly and will say so if a start date is unrealistic.
Frost depth is the other regional specific. Footings here must go well below frost, and any contractor proposing shallow footings or piers on grade for an addition in this climate is proposing something that will move.
Want this priced for your own home? Jeffrey Mason will walk the project and give you a free written estimate. No obligation, no sales rep. Call (518) 308-6427.
Frequently asked questions
What is the most important question to ask an addition contractor?
How the new roof will tie into the existing one. It is where additions leak, it requires specific detailing for differential movement, and a vague answer tells you a great deal.
Should engineering happen before the price?
Yes. Structural design determines a significant share of the cost, so a fixed price given before the engineering exists is provisional whether it is described that way or not.
Do I need a separate architect?
For most additions, stamped drawings are required for permit, which means an architect or engineer. We work alongside them regularly and handle the coordination.
When should an addition start?
Early enough in the year to be framed, roofed and dried in before winter. In this region that generally means starting no later than midsummer for a project of any size.