Custom deck building means the design starts from your actual lot, not a stock plan pulled off a shelf. In Chattanooga that matters more than it does in a lot of cities, since a design that ignores the slope behind your house, the height of your back door off the ground, or the direction storms usually blow in from tends to need fixing within a few years instead of holding up for decades. This page covers what goes into a build here, from the first site walk to the last swept board.
A kit or a big box store package assumes a rectangle, a standard railing, and a single level, because that is what fits on a shelf and in a generic instruction booklet. Custom deck building starts with a site visit instead of a catalog page: how your house sits on the lot, where the sun lands at six in the evening in July, whether you grill three times a week or twice a year, and whether the yard behind your house is flat, gently sloped, or drops off hard enough that a single level deck was never really on the table. The result might still be a simple rectangle if that is genuinely the right answer for your lot. More often around here it is a deck that steps down in two levels, wraps a corner of the house, or leaves a cutout around a tree nobody wants to lose. Custom just means the shape follows the lot instead of the other way around.
By treating the slope as the starting point of the design, not an obstacle to work around afterward. A builder walks the yard and takes actual elevation readings from the house down to the low point of the deck footprint, then decides whether the whole structure can sit at one height with taller posts on the downhill side, or whether it makes more sense to step the deck down in stages, sometimes landing on a lower patio or a walkout basement door. Footings get set at whatever depth the local frost line and soil bearing call for at each specific post location, which on a sloped lot is rarely the same depth all the way across the structure. Railing height gets checked against the actual walking surface at every point along the perimeter too, since a deck stepping down a hill can cross the 30 inch guardrail threshold on one end while staying under it on the other. None of this is exotic engineering. It is planning that assumes your yard is not flat, because most yards around Chattanooga are not, and a design that skips this step is the one that ends up with a deck that never quite feels solid on one corner.
That depends on budget, how much upkeep you want to sign up for, and how long you plan to stay in the house. Pressure treated lumber costs the least and needs the most maintenance. Cedar splits the difference with a warmer look and similar upkeep needs. Composite and PVC cost more upfront and need essentially none of the annual staining that wood does, which matters given how much rain and heat this area gets every summer. Most custom builds mix materials anyway: pressure treated framing underneath almost regardless of what the surface decking is, with the visible boards, railing, and trim chosen based on look and budget rather than structural need. The deck cost page breaks down real pricing by tier, and the composite decking page covers brand differences in more depth.
Not sure what your yard can actually support? Call (762) 318-1611 and a local builder will walk the site with you before you commit to a design.
It runs through roughly the same stages on every custom job, even though the design underneath varies a lot from house to house. First comes a site visit and a design conversation, where the builder measures the yard, discusses layout and material, and talks through budget honestly instead of steering you toward whatever is easiest to build. Next is the written estimate and, where the project needs one, the permit application, which the builder typically handles directly with the city or county rather than leaving that paperwork to you. Once permitted, the crew sets footings first, the part of the job that takes the longest to plan and the shortest to actually see, since most of it is buried by the time the deck is finished. Framing goes up next: posts, beams, and joists, sized to carry the specific load and span the design calls for. Decking boards go down after the framing passes inspection, followed by railing, stairs, and any trim or skirting that finishes the look. A final walk-through checks that everything is level, fastened correctly, and matches what was actually agreed to at the start, not just whatever turned out to be easiest along the way.
Sometimes, and it depends on how far the deck's height and span exceed what standard prescriptive code tables cover. Most residential deck framing in Chattanooga follows prescriptive tables that spell out joist size, spacing, and footing dimensions for typical spans and heights without needing a stamped engineering drawing. A deck that gets unusually tall, spans an unusually long distance without a middle support, or cantilevers out over a steep drop can exceed those tables, and at that point the permit process requires an engineer to sign off on the design before the city or county approves it. That adds time and cost, but it is not optional, and a builder who tries to skip that step on a deck that clearly needs it is a builder worth walking away from.
A simple ground level deck can go from framing to finished boards in a matter of days once the permit is in hand and materials are on site. A multi-level deck on a sloped lot, or one that involves a screened porch or a lot of custom railing, more often runs into a couple of weeks of active work, plus whatever time the permit process and material lead times add before the crew ever shows up. Weather adds its own variable in a place that gets as much rain as Chattanooga does, since footings and framing both go faster in a dry stretch than a wet one. Your builder should give you a realistic timeline as part of the written estimate, not just a start date pulled from a general rule of thumb.
In most cases yes, using taller posts, stepped or deeper footings, and sometimes a stamped engineering drawing for the tallest sections. There are limits set by soil conditions and how far a post can safely extend unsupported, which is exactly what the site visit is for.
No. Plenty of homeowners start with a general idea, more outdoor space, somewhere to put a grill, a spot for a hot tub someday, and let the builder walk them through what actually fits the lot and the budget from there.
Yes, and both come up often on Chattanooga lots. Cutouts around a tree trunk, decks that land level with a walkout door, and stepped designs that work around an existing patio are common custom requests, not unusual ones.
It happens, usually rock close to the surface, poor drainage, or soil that needs a different footing approach than originally planned. A good builder tells you before pouring anything, explains the fix and what it changes about cost or timeline, and lets you decide how to proceed.
In many cases yes, though the attachment method differs from a standard ledger board connection, since manufactured homes are not always built to carry that same load at the rim. A site visit determines whether the deck needs to be self-supporting instead of attached directly to the house.
Ready to see what a custom deck looks like on your specific lot? Call (762) 318-1611 for a free design conversation and on-site estimate with a licensed Chattanooga builder.