Home Additions in Rockville, MD

What a home addition in Rockville actually involves

Twinbrook's post-war capes and ramblers, 1960s and 1970s colonials and split-levels through the middle of the city, and 2000s neo-traditional townhomes around King Farm and Town Center.

• Feasibility and zoning before design. Pull the plat, establish the setbacks, calculate existing lot coverage, and confirm the height and bulk limits that apply. Roughly speaking, this determines the size and shape of what you can build before an architect draws a line.
• Design and engineering. Architectural drawings, a structural design for the new framing and for wherever the addition ties into the existing house, and the foundation design appropriate to the soil and grade.
• Permit submission and review. A complete package — site plan, architectural, structural, energy compliance — submitted to the reviewing jurisdiction, with responses to any comments handled by us rather than forwarded to you.
• Excavation and foundation. Footings below the local frost depth, foundation walls or piers, waterproofing and drainage, and a slab or crawlspace detail that will not become the source of a moisture problem later.

Lead paint: the rule that applies to most of Rockville

There is a federal rule most homeowners have never heard of and most bids never mention. The EPA's Renovation, Repair and Painting rule covers pre-1978 housing and requires a certified firm, contained work areas and a specific cleanup protocol any time painted surfaces are disturbed. Most of Rockville's housing stock predates 1978, so assume this applies to your house unless someone has established otherwise. We are an EPA lead-safe certified firm and we work that way as a matter of course. If you are getting bids and nobody else has raised this, that tells you something worth knowing about the bids.

What drives the cost on a Rockville home addition

You will notice we do not publish a price range. That is deliberate: the number depends on things nobody can see from the street. Here is what genuinely moves it, so you can interrogate every estimate you receive, including ours.

• How the roof ties in. A simple gable extension is straightforward; a tie-in into an existing hip or a low-slope intersection is engineering and flashing detail.
• Whether the addition includes plumbing. A bathroom or kitchen in the new space means supply, drain and vent to the addition.
• Second-story additions, which require verifying that the existing foundation and framing can carry the new load — sometimes they can, sometimes they need reinforcement.
• Modest suburban lots on public utilities, with the Twinbrook and College Gardens stock sitting on small footprints that push additions upward rather than outward. That is a Rockville-specific factor and it belongs in the conversation early.

The mistakes we get called in to fix

• Designing before checking setbacks and lot coverage. It is the single most common way people spend money on drawings that cannot be built.
• A roof tie-in that was not detailed, which is where additions leak. Flashing at the intersection of new and old roof planes is not a field decision.
• Not verifying the septic system's capacity on a septic-served property before adding bedrooms.

One licensed team, one contract, one point of contact

An addition touches excavation, foundations, framing, roofing, siding, windows, electrical, plumbing, HVAC and interior finish, and it has to marry a new structure to an old one so that the seam is invisible from both sides. There is no version of this that a homeowner can subcontract piecemeal and expect to go well. It is the definitional general contracting job.

The transparency test for any contractor is short: license number, certificate of insurance from the carrier, and a straight answer about subcontractors. Ours are MHIC #111971, general liability and workers' compensation with certificates available before signing, and yes, the specialty trades on your job are licensed subcontractors carrying their own coverage and pulling their own trade permits. One contract with us, one point of contact, and one company that owns the outcome regardless of which trade caused it.

Where we work in Rockville

• 20850
• 20851
• 20852
• 20853
• Twinbrook
• King Farm
• West End
• College Gardens
• Fallsmead
• Rockville Town Center

How a Rockville project runs

1. A free visit that produces a document, not a pitch. No presentation, no same-day discount, no financing conversation before anyone has looked at the house. We measure, we photograph, we ask what is not working, and we leave you with something written you can compare against every other bid.
2. Feasibility against Rockville rules, before design. We establish what the City of Rockville will require for home addition at your address, and what your lot, your zoning and your existing house will allow. Where historic review and association architectural approval applies, that submission is prepared and filed first, because the building permit is not useful until it clears.
3. Everything priced and agreed before a permit is filed. You see the scope broken into line items, the allowances stated as real numbers rather than vague placeholders, and the process for handling anything discovered mid-project. Only then does the permit package get assembled and submitted, with us answering the reviewer rather than forwarding comments to you.
4. One crew, one schedule, one closeout. MHIC #111971, Our own supervision on site, inspections met by us, and a documented punch walk with the permits closed out at the end.

Home Additions across Rockville and Montgomery County

Twinbrook, King Farm, West End, College Gardens, Fallsmead and Rockville Town Center are all inside our regular working area, along with 20850, 20851, 20852, 20853. Rockville's post-war stock is small by current standards, so the highest-value projects are the ones that add usable, code-legal living area rather than reconfiguring what is already there.

Homeowners here usually reach us for more than one thing at a time. Related work in Rockville: whole-home renovation in Rockville, kitchen remodeling in Rockville, basement finishing in Rockville, deck building in Rockville.

Our original trade is the building envelope, not cabinetry, and that changes what we notice. Water in a basement is usually a gutter and grading problem. A stained ceiling is usually flashing. A bouncy deck is a ledger problem. Because roofing, siding, aluminum siding, gutters and fascia and windows are work we self-perform, finding one of those mid-project is a line on a change order rather than a phone number for somebody else.

Rockville home additions questions